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Message #102515
[Bug 921321]
(In reply to Erik Karlsson from comment #50)
> Created attachment 113754 [details] [review]
> drm/nv50: Fix backlight not working when PWM_DIV is uninitialised (v4)
>
> I redid the patch for 3.18.6. Not sure what the use of removed nvif_rd32()
> chunk was, but it doesn't seem to be necessary anymore.
>
> Could this fix be predicated on the specific PCI ID if the effects are
> uncertain?
No, the value of NV50_PDISP_SOR_PWM_DIVis not derived from the PCI ID.
Judging by some other traces I've seen, we can't just unconditionally
set 0x5e to NV50_PDISP_SOR_PWM_DIV. Rather, someone needs to step up and
figure out how this parameter is correctly determined, which requires
some RE'ing work on a laptop that actually has it's brightness
controlled by the NVIDIA GPU rather than ACPI or some other backlight
component. Only then a patch like this can be merged.
--
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https://bugs.launchpad.net/bugs/921321
Title:
nouveau: dark screen after suspend/resume
Status in Accelerated Xorg driver for nVidia cards:
Incomplete
Status in xserver-xorg-video-nouveau package in Ubuntu:
Invalid
Bug description:
Nouveau works fine with brightness controls working fine after initial
boot, but I do S3 suspend, and then resume via power button, and
brightness controls don't work at all, and backlight is on, but set at
extremely low level.
hardware is Quadro 770M on HP 8530w laptop
/sys/.../brightness control does nothing when in this state,
suspend resume cycles after this first cycle all have the same problem.
I'll test if a full hibernate has the issue or not after this and
report back.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: xorg 1:7.6+7ubuntu7
Uname: Linux 3.3.0-rc1+ x86_64
.tmp.unity.support.test.1:
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,move,compiztoolbox,grid,vpswitch,gnomecompat,place,session,snap,mousepoll,regex,resize,imgpng,unitymtgrabhandles,wall,animation,workarounds,expo,fade,ezoom,scale,unityshell]
CompositorRunning: None
Date: Tue Jan 24 15:57:58 2012
DistUpgraded: Log time: 2011-10-20 21:20:49.957387
DistroCodename: oneiric
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard:
nVidia Corporation G96M [Quadro FX 770M] [10de:065c] (rev a1) (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company Device [103c:30e7]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MachineType: Hewlett-Packard HP EliteBook 8530w
PccardctlIdent:
Socket 0:
product info: "RICOH", "Bay8Controller", "", ""
manfid: 0x0000, 0x0000
function: 254 (unknown)
PccardctlStatus:
Socket 0:
3.3V 16-bit PC Card
Subdevice 0 (function 0) bound to driver "pata_pcmcia"
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.3.0-rc1+ root=UUID=824346e6-fd2f-4916-a2c9-e883c1fe860c ro splash quiet vga=771 crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to oneiric on 2011-10-21 (95 days ago)
Xrandr: Screen 0: minimum 0 x 0, current 3200 x 1200, maximum 4096 x 4096
dmi.bios.date: 12/13/2010
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68PDV Ver. F.13
dmi.board.name: 30E7
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 90.27
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68PDVVer.F.13:bd12/13/2010:svnHewlett-Packard:pnHPEliteBook8530w:pvrF.13:rvnHewlett-Packard:rn30E7:rvrKBCVersion90.27:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 8530w
dmi.product.version: F.13
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu6
version.ia32-libs: ia32-libs 20090808ubuntu26
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1
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