[REDWOOD] dell U2410 monitor repeatedly turns itself on and off when suspended

[Tim Cuthbertson]

Originally reported in fedora's bugtracker here: https://bugzilla.redhat.com/process_bug.cgi
But I've since moved to ubuntu. The bug is still present, so I thought I should report it here as well.

Description of problem:
Monitor does not standby / turn off, but instead keeps entering and leaving
standby.

How reproducible:
Always.

Steps to Reproduce:
1. xset dpms force off

Actual results:
The monitor goes dark (but not off). A few seconds later, the monitor shows me
an "entering power save mode" message and then actually turns off the
backlight. A second or so after that, the monitor backlight is turned on again,
with a DVI cable symbol in the top left corner as if a cable had just been
plugged in (my computer is connected to my monitor with DVI, and nothing else
is plugged into the monitor). Seconds later, it shows the message about
entering power save mode. This repeats indefinitely.

This also happens using the normal power saving settings, and leaving my
computer alone for 5 minutes.

Expected results:
Monitor should turn off / enter standby until I wake it

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-3.0.0-14-generic 3.0.0-14.23
ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
Uname: Linux 3.0.0-14-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: tim 1914 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xfe8f4000 irq 16'
   Mixer name : 'Realtek ALC887'
   Components : 'HDA:10ec0887,10280458,00100202'
   Controls : 36
   Simple ctrls : 21
Card1.Amixer.info:
 Card hw:1 'Generic'/'HD-Audio Generic at 0xfe9bc000 irq 43'
   Mixer name : 'ATI R6xx HDMI'
   Components : 'HDA:1002aa01,00aa0100,00100200'
   Controls : 4
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Mon Jan 2 10:20:26 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: Dell Inc. Studio XPS 7100
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-14-generic root=UUID=a60a2291-2148-457f-99c5-94c452dd9fad ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.0.0-14-generic N/A
 linux-backports-modules-3.0.0-14-generic N/A
 linux-firmware 1.60
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/10/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A06
dmi.board.name: 0GK1K2
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA06:bd09/10/2010:svnDellInc.:pnStudioXPS7100:pvr:rvnDellInc.:rn0GK1K2:rvrA00:cvnDellInc.:ct3:cvr:
dmi.product.name: Studio XPS 7100
dmi.sys.vendor: Dell Inc.

[Vlado Plaga (vlado-gmx)]

I have the same problem. I don't think it's good for the monitor, so I'll disable power saving for the time being.

My monitor is a "DELL P2411H" (from Xorg.0.log), and the X driver is Radeon. The monitor is connected via the DVI cable. I don't have the problem when I use fglrx, the proprietary AMD driver.

Searching the Redhat bugzilla I assume the equivalent bug is this: https://bugzilla.redhat.com/show_bug.cgi?id=714334 (the link in Tim Cuthbertson's bug description is missing the id)

[Vlado Plaga (vlado-gmx)]

Sorry for not having supplied a lot of detailed information on versions used last time - it was just the default Ubuntu 11.10 packages of the moment. I did have the same problem in Debian unstable though, but now it disappeared, and my monitor goes to sleep all right. Some versions:

X.Org X Server 1.11.3.901 (1.11.4 RC 1)
Release Date: 2012-01-06

Linux version 3.2.0-1-rt-amd64 (Debian 3.2.6-1)

[Austin Chu (eefi)]

This also affects me. Currently running Xubuntu Precise.

Video card: VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Juniper [Radeon HD 5700 Series]
Monitors: 2 Dell U2410s, both connected via DVI, both exhibit this symptom
Kernel: linux-image-3.2.0-26-generic 3.2.0-26.41
X driver: xserver-xorg-video-radeon 1:6.14.99~git20111219.aacbd629-0ubuntu2

[Tristan Verniquet (tris-vern)]

Broken for me with Dell U2410 and Juniper XT [AMD Radeon HD 6000 Series].

Note there was no problem when using the display-port cable. I have only noticed it since switching to hdmi. Another difference is that previously Ubuntu would detect that there was only one monitor (ie my other monitor) if the Dell U2410 was switched off, and would move any open windows onto the remaining monitor. Since switching to hdmi this does not happen.

[KennoVO (kenno-xs4all)]

Same problem with Intel HD Graphics 4000 on Xubuntu Precise

GPU: Intel Corporation Ivy Bridge Graphics Controller
Monitor: Viewsonic VX2025wm connected via HDMI
Kernel: 3.5.0-27-generic
X.Org X Server 1.11.3

[penalvch (penalvch)]

Tim Cuthbertson, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Please do not test the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.11-rc5

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding.

[Tim Cuthbertson (gfxmonk-gmail)]

Apologies for not updating this ticket. I've been running fedora for the last few releases. The fedora bug (https://bugzilla.redhat.com/show_bug.cgi?id=714334) has been fixed for a while now.

Given that it originally occurred on both, hopefully it's just an an upstream fix that ubuntu will get if you've merged xorg-x11-drv-ati, version 6.14.3. I'm afriad I can't test it out though, as I no longer run ubuntu - perhaps one of the other affected users can test?