Recently I underwent a botched nvidia-prime install that left a bitter taste in my mouth: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1249067
I had to purge my system of all nvidia drivers (apt-get --purge remove nvidia\*), then reinstall them: https://wiki.ubuntu.com/Bumblebee After reinstallation, when my screen goes blank after idling, sometimes it resumes to the desktop, other times I'm left at a black screen with moving cursor that appears to indicate the screen is actually there, but just not visible. The mouse cursor will change from a pointer to a hand (if it happens to hover over a hyperlink in the browser), or a 'I' (when it hovers over a text input area). I kept searching for a solution that related to the Xorg system, but everything I threw at it (the little I know about X) didn't bear fruit. In the end, I just simply had to go to a console (CTRL+ALT+F1) to restart lightdm to get my desktop back. When working with multiple windows and having many applications open, losing the desktop can cause one to experiance weird emotions and exhibit irrational actions; and it gets really old, really fast! To cut a long story short, today I got fedup with it and started killing anything that interracts with the display system (sometimes fatally that I had to reboot by holding power button down for >5secs) to get this sorted. Interestingly, the culprit appears to be compiz. I can now duplicate this easily: 1. launch screensaver preferences (i use xscreensaver) 2. select a GL screensaver (the black screen with mouse occurs more often with such a screensaver) 3. click Preview button then hit the ESC key to return to desktop repeatedly until the black screen+mouse appears 4. CTRL+ALT+F1 to go to console window 1 and run the command: kill -9 $(pgrep compiz) 5 CTRL+ALT+F7 to return to GUI desktop - you should see your desktop minus the open windows 6 move mouse cursor to get compiz to reactivate itself and bring all your open applications into view Hopefully this workaround will keep people like me sane for a little longer... Cheers, ak. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1273832 Title: [fglrx] Lockscreen/lid-close xserver freeze if UXA accel used. Status in “xserver-xorg-video-intel” package in Ubuntu: New Bug description: On a Haswell system, if AccelMethod UXA selected in xorg.conf, xserver freezes (moveable cursor, but frozen and unresponsive desktop) each time the screen is locked (either via inactivity or lid close on laptop) . This freeze does not occur if "SNA" AccelMethod is selected. This freeze can also be avoided if vblank_mode=0 is used, even if UXA acceleration selected. 1) Ubuntu release: 13.10, but I also tested this on 12.04 LTS, in which case I got exactly the same bug, only the frozen screen was blank rather than frozen desktop image. 2) Expected result: No freeze when locking screen/closing lid. Just the login screen greeter. 3) How to reproduce: On Haswell system, in xorg.conf: Section "Device" Identifier "Intel Graphics" Driver "intel" Option "AccelMethod" "UXA" #bug occurs # Option "AccelMethod" "SNA" #(default) no bug! EndSection reboot. Try closing the lid or locking screen a number of times (normally within a few attempts you will see the freeze). 4) Resolution: Short term solution is to switch to a tty and back. Alternatively, boot with the SNA acceleration method instead. Another alternative: use a dri config file in home directory: ~/.drirc containing <device screen="0" driver="dri2"> <application name="Default"> <option name="vblank_mode" value="0"/> </application> </device> to turn off vsync. 5) Importance for fglrx driver users with AMD cards: fglrx and pxpress by default force the i915 driver to use "UXA" mode, thus when selecting the iGPU users of fglrx will experience this freezing bug. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: xserver-xorg-video-intel 2:2.99.904-0ubuntu2.1 ProcVersionSignature: Ubuntu 3.11.0-15.23-generic 3.11.10 Uname: Linux 3.11.0-15-generic x86_64 NonfreeKernelModules: fglrx .tmp.unity.support.test.0: ApportVersion: 2.12.5-0ubuntu2.2 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: Tue Jan 28 20:43:34 2014 DistUpgraded: Fresh install DistroCodename: saucy DistroVariant: ubuntu DkmsStatus: fglrx, 13.251, 3.11.0-15-generic, x86_64: installed ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:2216] Subsystem: Lenovo Device [17aa:2216] InstallationDate: Installed on 2014-01-17 (10 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MachineType: LENOVO 20B3CTO1WW MarkForUpload: True ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-15-generic.efi.signed root=UUID=8a15962e-ad4d-4eb0-96af-37d167313e92 ro SourcePackage: xserver-xorg-video-intel UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/28/2013 dmi.bios.vendor: LENOVO dmi.bios.version: GPET53WW (1.53 ) dmi.board.asset.tag: Not Available dmi.board.name: 20B3CTO1WW dmi.board.vendor: LENOVO dmi.board.version: 0B98405 Std dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrGPET53WW(1.53):bd11/28/2013:svnLENOVO:pn20B3CTO1WW:pvrThinkPadS5-S540:rvnLENOVO:rn20B3CTO1WW:rvr0B98405Std:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20B3CTO1WW dmi.product.version: ThinkPad S5-S540 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1 version.fglrx-installer: fglrx-installer N/A version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.46-1ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.1-1ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.1-1ubuntu3 version.xserver-xorg-core: xserver-xorg-core 2:1.14.5-1ubuntu2~saucy1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.904-0ubuntu2.1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1 xserver.bootTime: Tue Jan 28 19:11:22 2014 xserver.configfile: /etc/X11/xorg.conf xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.14.5-1ubuntu2~saucy1 xserver.video_driver: intel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1273832/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
