Hi Chris, I'm afraid I don't understand the protocol/library/guarantees well enough to interpret what you're saying with 100% confidence.
The behaviour that I'm seeing is not consistent with one app DOSing itself. Chromium goes black, I restart Chromium (with the same tabs open), it's still black. I kill and restart the X server, restart Chromium again (with the same tabs open), and now it works again (for ~8-24 hours until the same thing happens again). I think you're saying that individual clients are allowed to allocate pixmaps out of the (very) limited mmaped space that is video RAM for this card and shared between app apps. And it's possible for a client to leak this space (it seems that maybe AWN or some of its applets does this), which eventually results in a DoS for other X apps (gnome- terminal, chromium) and makes the desktop unusable. My view is that if clients can do this, it represents a violation of X's responsibility to maintain stability of the desktop for all clients, in a way that doesn't seem to be consistent with the behaviour of X's behaviour with any other graphics driver. If clients can quite easily exhaust that resource, I don't think they should be allowed to allocate it at all. Why does the X server allow clients to allocate direct mapping pixmaps? What if the X server managed the graphics card's mapped memory, and decided for itself which pixmaps are actually mapped into the limited space available? One of the reasons that I prefer X over for example Windows is that it has always tried to protect itself against badly behaved apps crashing the desktop. If that is no longer the case, it annoys me quite a bit. Do you think this is a deeper bug in X that needs to be fixed? Cheers, Chris. -- 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/1053959 Title: Corrupt display after a while (after resume?) on intel graphics Status in X.org xf86-video-intel: Fix Released Status in “xserver-xorg-video-intel” package in Ubuntu: New Bug description: I'm using a Thinkpad X201 with Intel graphics: chris@lap-x201:~$ lspci -vvv -s 00:02.0 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device 215a Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 42 Region 0: Memory at f2000000 (64-bit, non-prefetchable) [size=4M] Region 2: Memory at d0000000 (64-bit, prefetchable) [size=256M] Region 4: I/O ports at 1800 [size=8] Expansion ROM at <unassigned> [disabled] Capabilities: <access denied> Kernel driver in use: i915 Kernel modules: i915 chris@lap-x201:~$ lspci -vvvn -s 00:02.0 00:02.0 0300: 8086:0046 (rev 02) (prog-if 00 [VGA controller]) Subsystem: 17aa:215a Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 42 Region 0: Memory at f2000000 (64-bit, non-prefetchable) [size=4M] Region 2: Memory at d0000000 (64-bit, prefetchable) [size=256M] Region 4: I/O ports at 1800 [size=8] Expansion ROM at <unassigned> [disabled] Capabilities: <access denied> Kernel driver in use: i915 Kernel modules: i915 I usually notice this problem after several days of use, which would normally include several suspend and resume cycles and (dis)connections of an external monitor. chris@lap-x201:~$ lsb_release -rd Description: Ubuntu 12.04.1 LTS Release: 12.04 chris@lap-x201:~$ apt-cache policy xserver-xorg-video-intel xserver-xorg-video-intel: Installed: 2:2.17.0-1ubuntu4.1 Candidate: 2:2.17.0-1ubuntu4.1 Version table: *** 2:2.17.0-1ubuntu4.1 0 500 http://gb.archive.ubuntu.com/ubuntu/ precise-updates/main i386 Packages 100 /var/lib/dpkg/status 2:2.17.0-1ubuntu4 0 500 http://gb.archive.ubuntu.com/ubuntu/ precise/main i386 Packages [ 75101.039] (II) intel(0): [DRI2] Setup complete [ 75101.039] (II) intel(0): [DRI2] DRI driver: i965 [ 75101.039] (II) intel(0): Allocated new frame buffer 1280x800 stride 5120, tiled [ 75101.050] (II) UXA(0): Driver registered support for the following operations: [ 75101.050] (II) solid [ 75101.050] (II) copy [ 75101.050] (II) composite (RENDER acceleration) [ 75101.050] (II) put_image [ 75101.050] (II) get_image [ 75101.050] (==) intel(0): Backing store disabled [ 75101.050] (==) intel(0): Silken mouse enabled [ 75101.050] (II) intel(0): Initializing HW Cursor [ 75101.333] (II) intel(0): RandR 1.2 enabled, ignore the following RandR disabled message. [ 75101.336] (==) intel(0): DPMS enabled [ 75101.336] (==) intel(0): Intel XvMC decoder enabled [ 75101.336] (II) intel(0): Set up textured video [ 75101.341] (II) intel(0): [XvMC] xvmc_vld driver initialized. [ 75101.341] (II) intel(0): direct rendering: DRI2 Enabled [ 75101.341] (==) intel(0): hotplug detection: "enabled" [ 75101.363] (II) AIGLX: enabled GLX_MESA_copy_sub_buffer [ 75101.363] (II) AIGLX: enabled GLX_INTEL_swap_event [ 75101.363] (II) AIGLX: enabled GLX_SGI_swap_control and GLX_MESA_swap_control [ 75101.363] (II) AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects [ 75101.363] (II) AIGLX: Loaded and initialized i965 [ 75101.363] (II) GLX: Initialized DRI2 GL provider for screen 0 [ 75101.364] (II) intel(0): Setting screen physical size to 338 x 211 ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: xserver-xorg-video-intel 2:2.17.0-1ubuntu4.1 Uname: Linux 3.6.0-030600rc6-generic i686 .tmp.unity.support.test.0: ApportVersion: 2.0.1-0ubuntu12 Architecture: i386 CompizPlugins: [core,composite,opengl,compiztoolbox,decor,grid,clone,regex,resize,animation,gnomecompat,snap,workarounds,vpswitch,fadedesktop,imgpng,mousepoll,move,place,ezoom,session,staticswitcher,fade,cube,scale,gears] CompositorRunning: compiz Date: Fri Sep 21 11:44:24 2012 DistUpgraded: 2012-08-25 13:19:45,909 DEBUG enabling apt cron job DistroCodename: precise DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, even including gdb or git bisection work if needed GraphicsCard: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:215a] MachineType: LENOVO 3323DAG ProcEnviron: LANGUAGE=en_GB:en TERM=xterm PATH=(custom, user) LANG=en_GB.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.6.0-030600rc6-generic root=UUID=3d626876-a6a6-4378-b989-3acdf40c39c7 ro quiet splash resume=/dev/sda5 vt.handoff=7 SourcePackage: xserver-xorg-video-intel UdevDb: Error: [Errno 2] No such file or directory UpgradeStatus: Upgraded to precise on 2012-08-25 (26 days ago) dmi.bios.date: 12/17/2010 dmi.bios.vendor: LENOVO dmi.bios.version: 6QET62WW (1.32 ) dmi.board.name: 3323DAG dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr6QET62WW(1.32):bd12/17/2010:svnLENOVO:pn3323DAG:pvrThinkPadX201:rvnLENOVO:rn3323DAG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 3323DAG dmi.product.version: ThinkPad X201 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.7.8-0ubuntu1.4 version.libdrm2: libdrm2 2.4.32-1ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.3+8.0.2-0ubuntu3.2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.3+8.0.2-0ubuntu3.2 version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.7 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1.2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4.1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2 To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1053959/+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
