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Message #103602
[Bug 1412730] Re: DELL U2415 monitor detection issues
Christopher,
Vivid with fglrx: none off the reported issues exist. U2415 is detected every time, display resolution is right, also dpms powersaving works as expected. In ATI control Center all hardware is detected. Also no xrandr issues
Trusty with fglrx: same as with vivid, none of the issues.
The main reason I'm not using fglrx is because it's proprietary, but also because the opensource radeon gives much better perfomance.
With fglrx there is lag in windows moving and resizing, also in videos. Next to that there is a lot of tearing visible. Whem turning on tear-free in Catalyst Control Center the lag gets even worse.
So fglrx is a workaround, but not a pleasant one. The lag and tearing is visible too many times during daily work.
At the moment I prefer my own workaround as mentioned above with the radeon driver and drm helper kernel parameter.
This way the displays work great without lag, but when booting, switching users in Unity or just going in suspend/standby I have to put the screen off and on a couple of times to get it out of standby.
One thing I noticed with the radeon driver: switching back and forth
between vt7 and and another vt gets the U2415 out of standby too
(eventually).
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https://bugs.launchpad.net/bugs/1412730
Title:
DELL U2415 monitor detection issues
Status in xorg package in Ubuntu:
Incomplete
Bug description:
My Laptop HP Elitebook 8740w has two external screens connected.
1 DELL U2412M connected to vga connector
1 DELL U2415 connected to Displayport.
I worked for about a year with a single external display, just U2412M
on the displayport without the issue I decribe.
The first issue:
When booting up and with screens attatched and active, the 2415 boots in 1024x768 resolution, the 2412 boots at the same moment in 1920x1200 as it should.
At the point where the login screen appears the 2415 goes in power save mode, most of the time.
The 2412 displays just fine at the moment.
After logging in, turning the 2415 off and on, sometimes helps the get the screen active (out of power save).
When it gets active, the resoltion is 1024x768, not 1920x1200.
In unity-control-center in display settings the 2415 is displayed as "Unknown Display" and the maximum resolution I can select is 1024x768.
Second issue:
After a laptop suspend the 2415 doenst alway become active again, the 2412 always.
Turning off an on the 2415 multiple time mostly helps to get the screen active.
Current partial workaround:
xorg.conf with monitor section for 1920x1200 as in attatchment.
This doesn't solve booting in 1024x768, but solves the resolution after logging in.
unity-control-center still lists "Unknown Screen"
Another strange behavior:
when executing xrandr command, most of the time the 2415 stays in 1024, but after a number of executions the screen swithes to 1920x1200. At that moment xrandr outputs all possible resolutions as it should.
When executing xrandr another time the 2415 switches back to 1024x768
Already tried kernel v3.18.3-vivid, no change.
Also tried Utopic live cd, no change.
Tried Windows 8.1, no issues with both screens. (however my main OS is Ubuntu trusty, so..., just for testing)
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8
ProcVersionSignature: Ubuntu 3.13.0-44.73-generic 3.13.11-ckt12
Uname: Linux 3.13.0-44-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 2.14.1-0ubuntu3.6
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Tue Jan 20 10:48:24 2015
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
DkmsStatus:
vboxhost, 4.3.20, 3.13.0-40-generic, x86_64: installed
vboxhost, 4.3.20, 3.13.0-43-generic, x86_64: installed
vboxhost, 4.3.20, 3.13.0-44-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
Advanced Micro Devices, Inc. [AMD/ATI] Broadway XT [Mobility Radeon HD 5870] [1002:68a0] (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company FirePro M7820 [103c:1520]
InstallationDate: Installed on 2014-05-11 (253 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Hewlett-Packard HP EliteBook 8740w
PccardctlStatus:
Socket 0:
3.3V
16-bit
PC Card
Subdevice 0 (function 0) bound to driver "pata_pcmcia"
ProcKernelCmdLine: BOOT_IMAGE=/@trusty/boot/vmlinuz-3.13.0-44-generic root=UUID=cfafe8f3-4766-4fc7-b6f3-857eefcd2aff ro rootflags=subvol=@trusty plymouth:debug splash quiet drm.debug=0xe radeon.audio=1
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/07/2014
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68CAD Ver. F.50
dmi.board.name: 1520
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 33.31
dmi.chassis.asset.tag: CNU1152Q9W
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68CADVer.F.50:bd07/07/2014:svnHewlett-Packard:pnHPEliteBook8740w:pvr:rvnHewlett-Packard:rn1520:rvrKBCVersion33.31:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 8740w
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.11.3+14.04.20141104-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.56-1~ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.2
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1.3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Tue Jan 20 09:37:08 2015
xserver.configfile: /etc/X11/xorg.conf
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.15.1-0ubuntu2.6
xserver.video_driver: radeon
---
.tmp.unity.support.test.0:
ApportVersion: 2.16.1-0ubuntu2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
DistUpgraded: Fresh install
DistroCodename: vivid
DistroRelease: Ubuntu 15.04
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
Advanced Micro Devices, Inc. [AMD/ATI] Broadway XT [Mobility Radeon HD 5870] [1002:68a0] (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company FirePro M7820 [103c:1520]
InstallationDate: Installed on 2014-12-29 (59 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20141224)
MachineType: Hewlett-Packard HP EliteBook 8740w
Package: xorg 1:7.7+7ubuntu2
PackageArchitecture: amd64
PccardctlStatus:
Socket 0:
3.3V
16-bit
PC Card
Subdevice 0 (function 0) bound to driver "pata_pcmcia"
PlymouthDebug: Error: [Errno 13] Permission denied: u'/var/log/plymouth-debug.log'
ProcKernelCmdLine: BOOT_IMAGE=/@vividtesting/boot/vmlinuz-3.18.0-13-generic root=UUID=cfafe8f3-4766-4fc7-b6f3-857eefcd2aff ro rootflags=subvol=@vividtesting splash quiet drm.debug=0xe plymouth:debug
ProcVersionSignature: Ubuntu 3.18.0-13.14-generic 3.18.5
Tags: vivid ubuntu reproducible compiz-0.9
Uname: Linux 3.18.0-13-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 07/07/2014
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68CAD Ver. F.50
dmi.board.name: 1520
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 33.31
dmi.chassis.asset.tag: CNU1152Q9W
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68CADVer.F.50:bd07/07/2014:svnHewlett-Packard:pnHPEliteBook8740w:pvr:rvnHewlett-Packard:rn1520:rvrKBCVersion33.31:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 8740w
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.12.1+15.04.20150213-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.58-2
version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.0~rc1-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.0~rc1-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.16.2.901-1ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
xserver.bootTime: Thu Feb 26 15:44:51 2015
xserver.configfile: default
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.16.2.901-1ubuntu4
xserver.video_driver: radeon
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