I have found a possible workaround.
For two days now I haven't had spontaneous monitor/resolution swithing, here's
what I have done.
Immediately after boot I launch terminal and do the following:
Vostro-3550:~$ xinput
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ Logitech USB Optical Mouse id=12 [slave pointer (2)]
⎜ ↳ DualPoint Stick id=15 [slave pointer (2)]
⎜ ↳ AlpsPS/2 ALPS DualPoint TouchPad id=16 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Power Button id=6 [slave keyboard (3)]
↳ Power Button id=9 [slave keyboard (3)]
↳ Sleep Button id=10 [slave keyboard (3)]
↳ Laptop_Integrated_Webcam_FHD id=11 [slave keyboard (3)]
↳ Dell Dell USB Entry Keyboard id=13 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=14 [slave keyboard (3)]
↳ Video Bus id=8 [slave keyboard (3)]
↳ Video Bus id=7 [slave keyboard (3)]
↳ Dell WMI hotkeys id=17 [slave keyboard (3)]
Vostro-3550:~$
Vostro-3550:~$ xinput disable 7
Vostro-3550:~$ xinput disable 8
Vostro-3550:~$ xinput disable 17
And that seems to do the trick.
I will do this every day now and will report back if it turns out that it
doesn't work.
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You received this bug notification because you are a member of Desktop
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https://bugs.launchpad.net/bugs/1293425
Title:
[Dell Vostro 3550] Display resolution keeps switching with external
monitor connected
Status in “xorg” package in Ubuntu:
New
Bug description:
If I use external monitor and extend my desktop to both the built-in
laptop display and the external LCD, the display settings are auto-
changed by the system. This may include resetting to a "mirrored"
display at 1024x768, a single display on the laptop panel, or a single
display on the external monitor.
If I use just the AMD GPU via the AMD CCC, my monitors keep switching
between resolutions, mirroring switches on and off every minute or so.
WORKAROUND: If I switch to just the Intel GPU via the AMD GPU, or
never install AMD drivers and just use the Intel GPU out-of-the-box, I
can go a day without spontaneous switching of resolutions and/or
mirroring displays, sometimes it happens like 2 or 3 times per day.
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.8.0-35.50-generic 3.8.13.13
Uname: Linux 3.8.0-35-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 2.9.2-0ubuntu8.5
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: Mon Mar 17 09:36:31 2014
DistUpgraded: Fresh install
DistroCodename: raring
DistroVariant: ubuntu
ExtraDebuggingInterest: I just need to know a workaround
GraphicsCard:
Intel Corporation 2nd Generation Core Processor Family Integrated Graphics
Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
Subsystem: Dell Device [1028:04cd]
Advanced Micro Devices [AMD] nee ATI Whistler [Radeon HD 6600M/6700M/7600M
Series] [1002:6741] (rev ff) (prog-if ff)
InstallationDate: Installed on 2014-03-17 (0 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MachineType: Dell Inc. Vostro 3550
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-35-generic
root=UUID=d9ac2de5-de02-45d6-af39-3588757a6e61 ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/03/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A11
dmi.board.vendor: Dell Inc.
dmi.board.version: A11
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias:
dmi:bvnDellInc.:bvrA11:bd08/03/2012:svnDellInc.:pnVostro3550:pvrNotSpecified:rvnDellInc.:rn:rvrA11:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Vostro 3550
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.9~daily13.06.19~13.04-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.46-1ubuntu0.1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.7-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.7-1ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu6.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.6-0ubuntu4.3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.7-0ubuntu1
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