This is the output of lspci -vvv for the graphics card:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV350
[Radeon 9550] (prog-if 00 [VGA controller])
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 932a
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 32 (2000ns min), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 16
Region 0: Memory at c0000000 (32-bit, prefetchable) [size=128M]
Region 1: I/O ports at b800 [size=256]
Region 2: Memory at cfef0000 (32-bit, non-prefetchable) [size=64K]
Expansion ROM at cfec0000 [disabled] [size=128K]
Capabilities: [58] AGP version 3.0
Status: RQ=256 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans-
64bit- FW+ AGP3+ Rate=x4,x8
Command: RQ=32 ArqSz=0 Cal=0 SBA+ AGP+ GART64- 64bit- FW-
Rate=x8
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Kernel driver in use: radeon
01:00.1 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] RV350
[Radeon 9550] (Secondary)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 932b
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 32 (2000ns min), Cache Line Size: 32 bytes
Region 0: Memory at b8000000 (32-bit, prefetchable) [size=128M]
Region 1: Memory at cfee0000 (32-bit, non-prefetchable) [size=64K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-ati in Ubuntu.
https://bugs.launchpad.net/bugs/1325940
Title:
Desktop sometimes comes up with undisplayable screen resolution
Status in “xserver-xorg-video-ati” package in Ubuntu:
New
Bug description:
Hello,
the PC from which I'm sending this report sometimes fails to boot into
the desktop properly (which desktop environment doesn't seem to
matter). In the failure case the following happens:
- The Plymouth Ubuntu splash gets displayed, but it looks distorted.
Flickering horizontal artifacts are shown all over the screen, it
looks a bit like a CRT Television with low signal.
- When the desktop is loaded (via autologin), one can see short
glimpses of its wallpaper, but after a few second the screen becomes
black and remains that way. The monitor _does_ seem to receive a
signal though.
- It is possible to switch to TTYs and to use them, but they show
similar artifacts like the Plymouth logo.
- If I query the display information on the monitor's OSD when the
screen is distorted, it reports a resolution of 1681x1050 or
1683x1050, which is 1-3 pixel bigger than the native horizontal
resolution of the 22" LCD screen.
Switching between different resolutions via entering 'xrandr --size
1024x768' blindly, followed by 'xrandr --size 1680x1050' brings up the
native resolution properly.
This does not happen on every boot, only in ~10-15% of the cases. I
was not able to find any pattern so far in the occurence of this bug.
The only thing I observed is that it _never_ happens when Windows XP
is started, thus my assumption is that the bug is related to the
xserver-xorg-video-radeon driver.
I tried to specify the correct resolution explicitly on the kernel
command line(adding video=DVI-I-1:1680x1050 ) but this has no positive
effect.
The monitor is connected via DVI.
Below is a video attached that tries to show how the TTYs look when
this bug occurs. Notice the abnormal blue lines, which are constantly
flickering.
Kind regards,
Jan
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xserver-xorg-video-radeon 1:7.3.0-1ubuntu3.1
ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
Uname: Linux 3.13.0-27-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: XFCE
Date: Tue Jun 3 13:23:38 2014
InstallationDate: Installed on 2014-04-22 (41 days ago)
InstallationMedia: Lubuntu 14.04 LTS "Trusty Tahr" - Release amd64
(20140416.2)
SourcePackage: xserver-xorg-video-ati
UpgradeStatus: No upgrade log present (probably fresh install)
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