** Description changed: - My laptop is DELL Vostro 3550. BIOS A11. - 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 "mirrored" displays at 1024x768 - - Resetting to a single display on the laptop panel - - Resetting to a single display on the external monitor + 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. - I am finding though that the issue is worse by far if I use AMD GPU than if I use Intel GPU. I switch between them with AMD CCC, however the issue is present even if I never install AMD drivers and just use Intel GPU out-of-the-box. - So, if I use AMD GPU my monitors keep switching between resolutions, mirroring switches on and off very frequently - like more times every minute. If I use Intel GPU I can go a day without spontaneous switching of resolutions and/or mirroring displays, sometimes it happens like 2 or 3 times per day. + 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) + 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
** Tags added: needs-focus -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1293425 Title: [Dell Vostro 3550] Display resolution keeps switching with external monitor connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1293425/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
