[sna] Need tty switch after screen off to resume display

[Timo Jyrinki]

This only happens with SNA (Option "AccelMethod" "sna"). Whenever screen is turned off by idling for the set idle time, it does not resume on eg. keyboard input. I need to additionally switch for example to tty1 (ctrl-alt-f1) and back to X (alt-f7) to get display back. This happens every time on my sandy bridge machine, and I remember seeing this months ago as well so it's not a new problem.

This is not bug #966744 since nothing problematic otherwise seems to be going on. I did not yet find an upstream bug reporting this.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xserver-xorg-video-intel 2:2.20.8-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-15.22-generic 3.5.4
Uname: Linux 3.5.0-15-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.5.2-0ubuntu4
Architecture: amd64
CheckboxSubmission: 1896b893828b4203b948b1eb6546be06
CheckboxSystem: d00f84de8a555815fa1c4660280da308
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
Date: Tue Sep 25 10:01:59 2012
DistUpgraded: 2012-09-04 13:34:07,753 DEBUG enabling apt cron job
DistroCodename: quantal
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:1427]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120316)
MachineType: ASUSTeK Computer Inc. UX31E
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-15-generic root=UUID=3a913d68-5aad-4ac9-9436-4798da5b8fc2 ro crashkernel=384M-2G:64M,2G-:128M quiet splash drm.vblankoffdelay=1 i915.semaphores=1 pcie_aspm=force vt.handoff=7
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to quantal on 2012-09-04 (20 days ago)
XorgConf:
 Section "Device"
  Identifier "Configured Video Device"
  Driver "intel"
  Option "AccelMethod" "sna"
 EndSection
dmi.bios.date: 03/12/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX31E.212
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX31E
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX31E.212:bd03/12/2012:svnASUSTeKComputerInc.:pnUX31E:pvr1.0:rvnASUSTeKComputerInc.:rnUX31E:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: UX31E
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
version.compiz: compiz 1:0.9.8.2+bzr3377-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.39-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0~git20120917.7cfd42ce-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0~git20120917.7cfd42ce-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.99.99~git20120913.8637f772-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.8-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu1

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Edward Donovan (edward.donovan)]

I'm running xorg-edgers right now, on my Ivy Bridge machine, and seeing this behavior. I don't have SNA turned on in the config file (no xorg.conf), but it appears to be switched on in those builds:

  [ 18.918] (II) intel(0): SNA initialized with IvyBridge backend

Thanks.

[Edward Donovan (edward.donovan)]

Oh, BTW, I'm running edgers to see if bug 966744 still happens. So far I've only seen this more minor bug, so it might be one behavior or the other. Or it could be that it masks the 966744 problem, or something, so I probably shouldn't speculate, oops. Thanks.

[Timo Aaltonen (tjaalton)]

confirmed here

Edward: if you can reproduce the other bug without sna at will, knowing that sna fixes it is good information for the upstream bug..

[Edward Donovan (edward.donovan)]

Thanks, Timo; good to know. It hasn't seemed consistently reproducible yet, but I'll try some more.

[Timo Jyrinki (timo-jyrinki)]

Hmm, it seems that magically maybe the last 2.20.x release fixed this for me. Which is great, of course.