Modesetting fails if large screen monitor attached at boot

Bug #570011 reported by Tim Holy on 2010-04-26
10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
xserver-xorg-video-ati (Ubuntu)
Undecided
Unassigned

Bug Description

I have a Thinkpad T60. If I boot from the RC1 live CD, graphical modesetting seems to work well if the external monitor is not connected at boot time. If I then plug in the monitor, I can then switch to a new resolution (1920x1080) from the old resolution (1400x1050). Switching back and forth multiple times seems to work well, in the 10 minutes I've been playing with the system.

However, if I boot with the monitor connected, then the resolution is set to 1024x768 on both screens, and when I try to set the resolution to something more useful, eventually the entire screen starts flickering with weird horizontal lines on the laptop's monitor, and the external monitor display wiggles around rapidly. The display is not usable under such circumstances. External monitor: Dell S2409W

Apparent workaround: boot with monitor disconnected, and then after logging in, connect the external monitor.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-21-generic 2.6.32-21.32
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ubuntu 3084 F.... knotify4
                      ubuntu 3127 F.... kmix
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xee400000 irq 17'
   Mixer name : 'Analog Devices AD1981'
   Components : 'HDA:11d41981,17aa2025,00100200'
   Controls : 20
   Simple ctrls : 11
Card29.Amixer.info:
 Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 79HT43WW-1.02'
   Mixer name : 'ThinkPad EC 79HT43WW-1.02'
   Components : ''
   Controls : 2
   Simple ctrls : 1
Card29.Amixer.values:
 Simple mixer control 'Console',0
   Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
   Playback channels: Mono
   Limits: Playback 0 - 14
   Mono: Playback 14 [100%] [on]
Date: Sun Apr 25 22:11:40 2010
HotplugNewDevices:

HotplugNewMounts:

LiveMediaBuild: Kubuntu 10.04 "Lucid Lynx" - Release Candidate i386 (20100419.1)
MachineType: LENOVO 2623D7U
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/khostname.seed boot=casper initrd=/casper/initrd.lz quiet splash --
ProcEnviron:
 LANGUAGE=
 LANG=en_US.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34
SourcePackage: linux
Symptom: storage
UdevMonitorLog:
 monitor will print the received events for:
 UDEV - the event which udev sends out after rule processing
UdisksMonitorLog: Monitoring activity from the disks daemon. Press Ctrl+C to cancel.
dmi.bios.date: 04/18/2006
dmi.bios.vendor: LENOVO
dmi.bios.version: 79ET60WW (1.05a)
dmi.board.name: 2623D7U
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr79ET60WW(1.05a):bd04/18/2006:svnLENOVO:pn2623D7U:pvrThinkPadT60:rvnLENOVO:rn2623D7U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2623D7U
dmi.product.version: ThinkPad T60
dmi.sys.vendor: LENOVO
---
Architecture: i386
DistroRelease: Ubuntu 10.04
DkmsStatus: Error: [Errno 2] No such file or directory
LiveMediaBuild: Kubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100427)
MachineType: LENOVO 2623D7U
Package: xorg 1:7.5+5ubuntu1
PackageArchitecture: i386
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/khostname.seed boot=casper initrd=/casper/initrd.lz quiet splash --
ProcEnviron:
 LANGUAGE=
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Tags: lucid lucid
Uname: Linux 2.6.32-21-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 04/18/2006
dmi.bios.vendor: LENOVO
dmi.bios.version: 79ET60WW (1.05a)
dmi.board.name: 2623D7U
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr79ET60WW(1.05a):bd04/18/2006:svnLENOVO:pn2623D7U:pvrThinkPadT60:rvnLENOVO:rn2623D7U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2623D7U
dmi.product.version: ThinkPad T60
dmi.sys.vendor: LENOVO
glxinfo: Error: [Errno 2] No such file or directory
system:
 distro: Ubuntu
 codename: lucid
 architecture: i686
 kernel: 2.6.32-21-generic

Tim Holy (holy-wustl) wrote :
David Tombs (dgtombs) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage. I have classified this bug as a bug in xorg.

When reporting bugs in the future please use apport, either via the appropriate application's "Help -> Report a Problem" menu or using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

affects: ubuntu → xorg (Ubuntu)
tags: removed: needs-upstream-testing resume suspend
David Tombs (dgtombs) wrote :

Please execute the following command in a terminal after booting with the monitor plugged in:

apport-collect 570011

This will help us to find and resolve the problem. Bear in mind that you may need to install the python-launchpadlib package from the universe repository. Additionally, when prompted to give apport-collect permissions for Launchpad you will need to give it at least the ability to "Change Non-Private" data as it will be adding information to your bug report. Thanks in advance!

Changed in xorg (Ubuntu):
status: New → Incomplete

apport information

tags: added: apport-collected
description: updated

apport information

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apport information

apport information

apport information

apport information

apport information

apport information

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apport information

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apport information

Changed in xorg (Ubuntu):
status: Incomplete → New
Bryce Harrington (bryce) on 2010-05-02
Changed in xorg (Ubuntu):
status: New → Confirmed
Bryce Harrington (bryce) on 2010-05-03
affects: xorg (Ubuntu) → xserver-xorg-video-ati (Ubuntu)
Bryce Harrington (bryce) on 2010-05-09
tags: added: kubuntu
Gary M (garym) on 2010-05-11
tags: added: regression-release
removed: regression-proposed
Tim Holy (holy-wustl) wrote :

I have now installed Lucid on a new hard drive, and with a bit more experience I can amplify this report a bit. It turns out that this largescreen monitor also fails even if the monitor is connected after the boot process, IF compositing is turned on. The only reliable way to get the monitor to work is to first turn desktop effects off. However, if I turn desktop effects off (in Kubuntu's SystemSettings->desktop) and then reboot with the monitor connected, this is not sufficient to fix the boot problem: I still get the "wiggly lines" on the kdm login screen (and thereafter).

I wonder if specific problems during booting might have something to do with compositing being on at some point during the process, before my own configuration turns it off?

I think the reason I didn't notice this extra twist when I was trying the live CD is that compositing must have been auto-disabled; I have noticed that happening frequently on its own. I now just turn off desktop effects all the time and wait to connect the monitor until after I have logged in. These steps appear to work around the problem.

Tim Holy (holy-wustl) wrote :

Yet another update. It turns out that compositing proved not to be the culprit; things got bad faster if compositing was on, but eventually it happens anyway even if compositing was off. I was teaching recently and the display on my laptop was fine, but the display that the class saw was weaving in a slow samba dance. A bit embarassing. Had to reboot to fix it.

I now think the real culprit is kernel mode setting. I added a file /etc/modprobe.d/radeon.conf with the following line:
options radeon modeset=0

Since I added this, I have not seen wiggling displays. It is back to being a bit more like my previous experiences: I frequently have to restart X if I want the monitor to be recognized at its highest resolution. However, at least the display itself works, and the machine is more stable than with KMS on.

Tim Holy (holy-wustl) wrote :

This is no longer a problem in Maverick alphas (daily build from 2010-08-26).

Tim Holy (holy-wustl) wrote :

I should have also added: it still is a problem in Lucid, if I turn KMS back on.

Tom Holy, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/570011/comments/24 regarding this being fixed with an update. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.

Changed in xserver-xorg-video-ati (Ubuntu):
status: Confirmed → Invalid
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