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Message #148279
[Bug 829086] Re: Artifacts in 3D with Sandy Bridge
Launchpad has imported 53 comments from the remote bug at
https://bugs.freedesktop.org/show_bug.cgi?id=39730.
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On 2011-08-01T22:09:35+00:00 Ben Hodgetts wrote:
Created attachment 49803
Minecraft
All the blocks in the world seem to have what look like crawling black
ants on them, specifically around the edges (this is also happening in
other games, not just Minecraft).
System environment:
-- chipset: Sandybridge (HD3000)
-- system architecture: 64-bit
-- xf86-video-intel: 2.15.0
-- xserver: 1.10.3
-- mesa: 7.11
-- libdrm: 7.11
-- kernel: 3.0
-- Linux distribution: Arch
-- Machine or mobo model: Dell XPS 15 L502X
-- Display connector: LVDS
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/0
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On 2011-08-01T22:26:13+00:00 Ben Hodgetts wrote:
Forgot to mention that the game runs unplayably slow, 2fps or so. Not
sure if it's related as the hardware is clearly enough to cope.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/1
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On 2011-08-20T04:08:46+00:00 Austin Holbrook wrote:
Bug affects me as well. Happens in other games, but seems to show up the
worst in Minecraft.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/7
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On 2011-08-20T09:44:38+00:00 Ben Hodgetts wrote:
*** Bug 39732 has been marked as a duplicate of this bug. ***
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/8
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On 2011-08-20T09:44:45+00:00 Ben Hodgetts wrote:
*** Bug 39733 has been marked as a duplicate of this bug. ***
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/9
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On 2011-08-20T09:59:14+00:00 Ben Hodgetts wrote:
Created attachment 50393
Warcraft 3
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/10
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On 2011-08-20T10:00:46+00:00 Ben Hodgetts wrote:
Created attachment 50394
SuperTuxKart
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/11
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On 2011-08-20T10:02:18+00:00 Ben Hodgetts wrote:
Created attachment 50395
Spring Engine (NOTA)
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/12
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On 2011-08-20T10:03:24+00:00 Ben Hodgetts wrote:
Created attachment 50396
Warzone 2100
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/13
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On 2011-08-20T10:04:29+00:00 Ben Hodgetts wrote:
Just adding to this list, I've found that this bug affects:
Minecraft
Stunt Racer
Spring (the 3D TA remake engine)
SuperTuxKart (specifically certain karts)
Warzone 2100
I'm sure there are many others but that should be sufficient for now.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/14
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On 2011-08-20T12:00:40+00:00 Ben Hodgetts wrote:
Also can be seen on the leaves and the back of the players head in
UT2004.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/15
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On 2011-08-23T23:11:31+00:00 Austin Holbrook wrote:
Issue is not fixed in 7.11. It also happens across all distros that I've
tried.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/16
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On 2011-08-23T23:25:13+00:00 Ben Hodgetts wrote:
This bug is logged against 7.11 ;) (it just doesn't let you select it
in the drop-down list).
It's still an issue with current GIT too.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/17
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On 2011-08-30T11:48:05+00:00 K00-fol wrote:
*** Bug 35165 has been marked as a duplicate of this bug. ***
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/18
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On 2011-08-30T12:00:41+00:00 K00-fol wrote:
I've observed that the artifacts can be temporary removed by the debugfs
API on my affected game.
mkdir /tmp/debugfs
mount -t debugfs /tmp/debugfs /tmp/debugfs
echo 1 > /tmp/debugfs/dri/0/i915_wedged
Could be a clue?
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/19
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On 2011-09-01T01:27:57+00:00 Austin Holbrook wrote:
I noticed that installing the AdventureCraft mod for Minecraft actually
prevents this from happening. Every now and then you can see the
artifacts, but they quickly disappear.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/20
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On 2011-09-02T00:59:01+00:00 K00-fol wrote:
*** Bug 40544 has been marked as a duplicate of this bug. ***
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/21
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On 2011-09-03T02:53:15+00:00 Eric Anholt wrote:
I'm deciding that this bug report is now only about SuperTuxKart, so we
can focus on that. It may all be related, but talk about the other apps
will only serve as a distraction from solving the problem.
Steps to reproduce:
1) start supertuxkart
2) choose "race"
3) mouseover the purple bird character
4) Observe flickering pixels
By forcing alphatest off (brw_draw.c: smash ctx->Color.AlphaEnabled to
false), the flickering goes away. Most of the alpha-enabled drawing in
the app uses (GL_GREATER, 0.0), while the two failing characters use
(GL_GREATER, 0.5). Switching to GL_ALWAYS doesn't workaround, nor does
disabling the alpha test bit in the CC unit. always_flush_batch=true
does not workaround, either.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/22
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On 2011-09-03T03:08:43+00:00 Eric Anholt wrote:
Smashing the fb write to have an alpha of 1.0 also doesn't affect the
problem, though it does show off the ways the app uses the alpha test.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/23
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On 2011-09-03T10:19:33+00:00 K00-fol wrote:
Some trial and error on my end revealed that it's enough to remove
ctx->Color.AlphaEnabled from the test in:
In mesa/drivers/dri/i965/gen6_wm_state.c
if (fp->program.UsesKill || ctx->Color.AlphaEnabled)
dw5 |= GEN6_WM_KILL_ENABLE;
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/24
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On 2011-09-03T10:36:43+00:00 K00-fol wrote:
((forgot to say that above is no fix as it introduce other artifacts))
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/25
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On 2011-09-08T20:50:22+00:00 Austin Holbrook wrote:
Any updates on the bug? And should a bug be filed against the Intel
drivers?
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/26
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On 2011-09-09T18:37:28+00:00 Eric Anholt wrote:
Interesting. After a fresh reboot, I wasn't able to reproduce the
problem until I ran Minecraft and looked at its artifacts for a while,
at which point supertuxkart's artifacts came back.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/27
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On 2011-09-13T02:31:02+00:00 Austin Holbrook wrote:
The flickering pixels are kind of hit and miss for me. While they almost
always appear in Minecraft, they don't always appear in the other games.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/28
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On 2011-09-28T17:27:12+00:00 Machado-prx wrote:
So there is no fix to this bug? I'm with all the git drivers and this
error don't go away.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/29
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On 2011-09-29T03:15:18+00:00 Austin Holbrook wrote:
So far, it doesn't look like we have much information as to what's
causing the problem. Might be tricky to see what's happening. I really
hope that a fix is found, as this is driving me insane.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/30
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On 2011-10-01T16:16:39+00:00 Machado-prx wrote:
I do not know much about language C but I found this in mesa git, which
seems to be related to our problem:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=367020d87ce8c27aeb58b3887fbd29d216fdc151
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/31
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On 2011-10-05T04:49:27+00:00 Austin Holbrook wrote:
I don't know much about C either, but hopefully posting another comment
will get some attention to this bug.
I'm surprised this isn't affecting more people honestly. It seems like
it would be easy to run into if you have a Sandy Bridge processor.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/32
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On 2011-10-05T23:38:14+00:00 Machado-prx wrote:
(In reply to comment #27)
> I don't know much about C either, but hopefully posting another comment will
> get some attention to this bug.
>
> I'm surprised this isn't affecting more people honestly. It seems like it would
> be easy to run into if you have a Sandy Bridge processor.
I think all people with our video card, are being affected by this
problem but seem to not realize it yet as we have seen does not affect
all programs. Frankly most people who use linux do not seek to use it
for games, for that reason I think the fix for this bug will not be
released soon by the fact that hardly anyone will notice this bug.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/33
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On 2011-10-13T07:29:24+00:00 Freedesktop-signup wrote:
Two new Thinkpad Laptops I have are affected by the same issue, in
minecraft as well as in other games. Recently I added
i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1
as kernel boot parameters to reduce the power consumption of these
laptops. Interestingly, this seemed to reduce the frequency and duration
of these artifacts. While they used to remain until I shut down the
program, they now tend to disappear again after a few seconds.
The system specs of one of the machines are:
System: Host: skadi Kernel: 3.0-ARCH x86_64 (64 bit) Desktop Xfce 4.8.3 Distro: Arch Linux
Machine: System: LENOVO product: 429136G version: ThinkPad X220
Mobo: LENOVO model: 429136G Bios: LENOVO version: 8DET41WW (1.11 ) date: 03/28/2011
CPU: Dual core Intel Core i7-2620M CPU (-HT-MCP-) clocked at 800.00 MHz
Graphics: Card: Intel 2nd Generation Core Processor Family Integrated Graphics Controller
X.Org: 1.11.1 driver: intel Resolution: 1366x768@60.1hz
GLX: Mesa DRI Intel Sandybridge Mobile GLX Version: 2.1 Mesa 7.11
If I can help with any more information or testing, please let me know.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/37
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On 2011-10-14T03:26:55+00:00 Austin Holbrook wrote:
(In reply to comment #29)
> Two new Thinkpad Laptops I have are affected by the same issue, in minecraft as
> well as in other games. Recently I added
>
> i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1
>
> as kernel boot parameters to reduce the power consumption of these laptops.
> Interestingly, this seemed to reduce the frequency and duration of these
> artifacts. While they used to remain until I shut down the program, they now
> tend to disappear again after a few seconds.
>
> The system specs of one of the machines are:
>
> System: Host: skadi Kernel: 3.0-ARCH x86_64 (64 bit) Desktop Xfce 4.8.3
> Distro: Arch Linux
> Machine: System: LENOVO product: 429136G version: ThinkPad X220
> Mobo: LENOVO model: 429136G Bios: LENOVO version: 8DET41WW (1.11 )
> date: 03/28/2011
> CPU: Dual core Intel Core i7-2620M CPU (-HT-MCP-) clocked at 800.00 MHz
> Graphics: Card: Intel 2nd Generation Core Processor Family Integrated Graphics
> Controller
> X.Org: 1.11.1 driver: intel Resolution: 1366x768@60.1hz
> GLX: Mesa DRI Intel Sandybridge Mobile GLX Version: 2.1 Mesa 7.11
>
The behavior you're describing is what I was experiencing with the 2.6.39 kernel. The artifacts got noticably worse after upgrading to 3.x.
> If I can help with any more information or testing, please let me know.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/38
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On 2011-10-16T01:06:25+00:00 Machado-prx wrote:
(In reply to comment #30)
> (In reply to comment #29)
> > Two new Thinkpad Laptops I have are affected by the same issue, in minecraft as
> > well as in other games. Recently I added
> >
> > i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1
> >
> > as kernel boot parameters to reduce the power consumption of these laptops.
> > Interestingly, this seemed to reduce the frequency and duration of these
> > artifacts. While they used to remain until I shut down the program, they now
> > tend to disappear again after a few seconds.
> >
> > The system specs of one of the machines are:
> >
> > System: Host: skadi Kernel: 3.0-ARCH x86_64 (64 bit) Desktop Xfce 4.8.3
> > Distro: Arch Linux
> > Machine: System: LENOVO product: 429136G version: ThinkPad X220
> > Mobo: LENOVO model: 429136G Bios: LENOVO version: 8DET41WW (1.11 )
> > date: 03/28/2011
> > CPU: Dual core Intel Core i7-2620M CPU (-HT-MCP-) clocked at 800.00 MHz
> > Graphics: Card: Intel 2nd Generation Core Processor Family Integrated Graphics
> > Controller
> > X.Org: 1.11.1 driver: intel Resolution: 1366x768@60.1hz
> > GLX: Mesa DRI Intel Sandybridge Mobile GLX Version: 2.1 Mesa 7.11
> >
>
> The behavior you're describing is what I was experiencing with the 2.6.39
> kernel. The artifacts got noticably worse after upgrading to 3.x.
> > If I can help with any more information or testing, please let me know.
So our problem aren't in mesa drivers? Let's try change the kernel for
old versions, or dev versions.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/40
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On 2011-10-16T20:52:21+00:00 Austin Holbrook wrote:
(In reply to comment #31)
> So our problem aren't in mesa drivers? Let's try change the kernel for old
> versions, or dev versions.
It's unlikely that it isn't a bug with mesa, but something between
kernel versions seems to have worsened the effect.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/41
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On 2011-10-25T09:07:34+00:00 K00-fol wrote:
*** Bug 41993 has been marked as a duplicate of this bug. ***
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/42
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On 2011-10-25T09:09:37+00:00 K00-fol wrote:
*** Bug 41893 has been marked as a duplicate of this bug. ***
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/43
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On 2011-11-08T02:22:32+00:00 Eric Anholt wrote:
We finally isolated the issue by cutting down the "fire" demo to a
minimal case and poking around at that. Proposed patch is at:
http://lkml.indiana.edu/hypermail/linux/kernel/1111.0/02876.html
You can apply that patch to test (and a Tested-by: would be appreciated
if it fixes it), or as a one-shot fix you can try "sudo intel_reg_write
0x9404 0x00001000" from intel-gpu-tools (in any reports on
success/failure of this test, please note which you tried. Also, the
intel_reg_write workaround doesn't appear to take effect until your GPU
has gone thoroughly idle for a while.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/46
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On 2011-11-08T09:28:52+00:00 Alejandro-aero wrote:
I have applied the proposede patch over Linux 3.1 kernel and it seems to
solve the issues i reported on flightgear (#40544)
I will test it more these days, however.
Thank you very much ! :)
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/49
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On 2011-11-08T09:47:19+00:00 Brot+bfdo wrote:
I have also applied that patch (onto the 3.1-rc6+ drm-intel-next) and it
fixes my problems with Minecraft on Sandybridge.
If you want to, you can add my tested-by:
Michael "brot" Groh <brot@xxxxxxxx>
Thanks for your help Eric!
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/50
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On 2011-11-08T16:09:32+00:00 denstark wrote:
I attempted to run the one-off fix but it came back with an error:
[tstella@elmdor ~]$ sudo intel_reg_write 0x9404 0x00001000
Couldn't map MMIO region: No such file or directory
xserver: 1.11.1.902
mesa 7.11-4
libdrm 2.4.27-1
kernel: 3.0
distro: Arch
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/51
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On 2011-11-08T18:55:35+00:00 Kenxeth wrote:
I'm pretty sure the "Couldn't map MMIO region" error from
intel_reg_write means your intel-gpu-tools is too old. We haven't done
a release of that in a while, so you might need to install it from git.
Or, just try the kernel patch (which is now upstream in Keith's drm-
intel-next tree.)
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/52
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On 2011-11-09T16:01:48+00:00 Machado-prx wrote:
Applying the patch on kernel 3.2-rc1 works for me, thanks to your help
Eric. =D
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/53
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On 2011-11-09T21:23:14+00:00 Machado-prx wrote:
Sorry for the hasty reply, but the benchmarks Unigine Tropics and
Sanctuary continue the mistakes of pixels. But Heroes Of NewerEarth
SuperTuxKart and were corrected.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/54
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On 2011-11-10T04:30:50+00:00 Austin Holbrook wrote:
It fixed the issues in Minecraft for me. And, seems to have improved the
performance slightly. I still notice weird artifacts in other
applications once Minecraft starts running, but this is far less
annoying than the other bug.
xorg-server - 1.11.2
mesa - 7.11
libdrm - 2.4.27
kernel - 3.1.0-4-ARCH
distro - Arch 64bit
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/55
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On 2011-11-10T04:41:52+00:00 Austin Holbrook wrote:
Created attachment 53359
Screencap of artifact that still exists after quick solution
Sorry about the double reply. Here is a screenshot of some of the
artifacts that still exist. I didn't apply the patch; I used the one-
line solution, if it makes any difference.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/56
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On 2011-11-10T23:34:38+00:00 B5gzilla wrote:
Running on Ubunut Ocelot (11.10) and a T420S (i5-2520M) -- I grabbed the latest intel-gpu-tools from git first to avoid the "Couldn't map MMIO region" error, then did:
sudo ./intel_reg_write 0x9404 0x00001000
This entirely fixes the transparent pixel issues for me. (The main
Minecraft guy's hand flickers briefly into a triangle now and then, but
that's nothing by comparison.)
Tons of thanks, Eric Anholt -- I'm using it for a pretty trivial
purpose, but I'm really excited to be able to play games again. :)
System information:
-- chipset: Sandybridge (HD3000)
-- system architecture: 64-bit
-- xf86-video-intel: 2.15.0
-- xserver: 1.10.4
-- kernel: 3.0
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/58
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On 2011-11-15T16:36:55+00:00 Windowsdowninthewinter wrote:
This problem persists for me.
I think the version of Mesa I have already implements the patch
mentioned. I also tried the 'one shot' solution with no luck.
ben@monitor:~$ uname -a
Linux monitor 3.1.1-030101-generic #201111111651 SMP Fri Nov 11 21:52:29 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
ben@monitor:~$ cat /proc/cpuinfo
model name : Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid
motherboard is a zotac
any more info much appreciated (want to play minecraft on my new
computer)
ben
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/62
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On 2011-11-15T17:00:52+00:00 P P wrote:
One-shot solution doesn't work for me.
Warcraft 3 is not playable :/ Still pixels flickering
I have to use Nvidia GPU (it works ok)
Linux Mint 12 RC1.
2011/11/15 <bugzilla-daemon@xxxxxxxxxxxxxxx>
> https://bugs.freedesktop.org/show_bug.cgi?id=39730
>
> --- Comment #45 from windowsdowninthewinter@xxxxxxxx 2011-11-15 08:36:55
> PST ---
> This problem persists for me.
>
> I think the version of Mesa I have already implements the patch mentioned.
> I
> also tried the 'one shot' solution with no luck.
>
>
> ben@monitor:~$ uname -a
> Linux monitor 3.1.1-030101-generic #201111111651 SMP Fri Nov 11 21:52:29
> UTC
> 2011 x86_64 x86_64 x86_64 GNU/Linux
>
>
> ben@monitor:~$ cat /proc/cpuinfo
> model name : Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
> cmov
> pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx
> rdtscp lm
> constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc
> aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr
> pdcm
> sse4_1 sse4_2 popcnt aes xsave avx lahf_lm ida arat epb xsaveopt pln pts
> dts
> tpr_shadow vnmi flexpriority ept vpid
>
> motherboard is a zotac
>
> any more info much appreciated (want to play minecraft on my new computer)
>
>
> ben
>
> --
> Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
> ------- You are receiving this mail because: -------
> You are on the CC list for the bug.
>
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/63
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On 2011-11-15T17:44:45+00:00 Machado-prx wrote:
(In reply to comment #45)
> This problem persists for me.
>
> I think the version of Mesa I have already implements the patch mentioned. I
> also tried the 'one shot' solution with no luck.
>
>
> ben@monitor:~$ uname -a
> Linux monitor 3.1.1-030101-generic #201111111651 SMP Fri Nov 11 21:52:29 UTC
> 2011 x86_64 x86_64 x86_64 GNU/Linux
>
>
> ben@monitor:~$ cat /proc/cpuinfo
> model name : Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
> pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm
> constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc
> aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm
> sse4_1 sse4_2 popcnt aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dts
> tpr_shadow vnmi flexpriority ept vpid
>
> motherboard is a zotac
>
> any more info much appreciated (want to play minecraft on my new computer)
>
>
> ben
Hello buddy, you have to apply the patch on kernel source not on mesa.
Try the patch, he works for me.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/64
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On 2011-11-16T00:06:42+00:00 Mike Gratton wrote:
Can the people reporting they still have this problem comment on the
following:
1. Did they apply the fix from just the first patch, or both?
2. If using the one-shot fix, did they execute the command before launching the app/game?
The second patch is found on the same thread as the first:
1st: http://lkml.indiana.edu/hypermail/linux/kernel/1111.0/02876.html
2nd: http://lkml.indiana.edu/hypermail/linux/kernel/1111.0/02877.html
The one-shot fix command that is equivalent to both patches is:
sudo intel_reg_write 0x9404 0x00001800
(Note that the second value is 0x1800, not 0x1000)
Also note that the one-shot fix does not survive a logout, reboot, or
resume from suspend/hibernate.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/65
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On 2011-11-18T15:43:03+00:00 K00-fol wrote:
I've successfully mitigated all flickering pixels using the one-shot fix
in all games I currently have installed. (Supertuxkart, Neverwinter
Nights and Vdrift)
I've not tested patching the kernel for it yet.
Some observations:
If the problems had already appeared, the one-shot fix would not help
the situation. It required a reboot or simulating a gpu wedging
(i915_wedged, to trigger some kind of reset) before the flickering would
disappear. Disclaimer: Observation made using the previous, /wrong/ 1000
number.
I do however get more full solid flickers now, especially on shadows in
Neverwinter Nights at certani camera angles. In supertuxkart it's much
more rare, but sometimes kart flicker there. Tire tracks flicker more
often, but I'm not sure this is a driver problem yet.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/66
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On 2011-11-20T00:08:51+00:00 Windowsdowninthewinter wrote:
(In reply to comment #47)
> (In reply to comment #45)
> > This problem persists for me.
> >
> > I think the version of Mesa I have already implements the patch mentioned. I
> > also tried the 'one shot' solution with no luck.
> >
> >
> > ben@monitor:~$ uname -a
> > Linux monitor 3.1.1-030101-generic #201111111651 SMP Fri Nov 11 21:52:29 UTC
> > 2011 x86_64 x86_64 x86_64 GNU/Linux
> >
> >
> > ben@monitor:~$ cat /proc/cpuinfo
> > model name : Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz
> > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
> > pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm
> > constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc
> > aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm
> > sse4_1 sse4_2 popcnt aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dts
> > tpr_shadow vnmi flexpriority ept vpid
> >
> > motherboard is a zotac
> >
> > any more info much appreciated (want to play minecraft on my new computer)
> >
> >
> > ben
>
> Hello buddy, you have to apply the patch on kernel source not on mesa. Try the
> patch, he works for me.
ok how does i?
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/67
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On 2011-11-21T10:07:02+00:00 Chris Lord wrote:
Just to note, the temporary fix of running 'intel_reg_write 0x9404
0x00001800' fixes the crawling transparent pixels for me, but does not
fix the various other glitches while running Minecraft (sporadic junk
textures and incorrect texture coordinates appearing everywhere
(including in applications outside of Minecraft)) - This probably ought
to be a separate bug.
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/68
------------------------------------------------------------------------
On 2011-11-21T16:33:49+00:00 P P wrote:
intel_reg_write 0x9404 0x00001800 do the job for me,
I would like to install new kernel, can anybody tell me why 32-bit
version is not avaiable http://kernel.ubuntu.com/~kernel-ppa/mainline
/drm-intel-next/current/ ?
Reply at: https://bugs.launchpad.net/mesa/+bug/829086/comments/69
** Changed in: mesa
Status: Unknown => Confirmed
** Changed in: mesa
Importance: Unknown => Medium
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https://bugs.launchpad.net/bugs/829086
Title:
Artifacts in 3D with Sandy Bridge
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