This seems to be fixed with the update to xorg-video-ati 7.1.0-0ubuntu1 (or the xserver). I can't trigger this crash anymore by fast-user-switching.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/1101989 Title: Xorg crashed with SIGABRT in R600UploadToScreenCS() Status in “xserver-xorg-video-ati” package in Ubuntu: New Bug description: Fast-user switching results in a black screen, X crash. #8 <signal handler called> No locals. #9 __memcpy_sse2 () at ../sysdeps/x86_64/multiarch/../memcpy.S:272 No locals. #10 0x00007f402c498737 in memcpy (__len=7680, __src=<optimized out>, __dest=0x7f402606e000) at /usr/include/x86_64-linux-gnu/bits/string3.h:51 No locals. #11 R600UploadToScreenCS (pDst=0x7f4031abfc90, x=0, y=0, w=1920, h=1080, src=<optimized out>, src_pitch=7680) at ../../src/r600_exa.c:1609 pScrn = 0x7f4031520690 info = 0x7f4031521340 accel_state = 0x7f4031abfc90 driver_priv = <optimized out> scratch = <optimized out> copy_dst = 0x7f4031ad0a90 dst = 0x7f402606e000 <Address 0x7f402606e000 out of bounds> size = 7680 dst_domain = 4 bpp = <optimized out> scratch_pitch = <optimized out> copy_pitch = 7680 dst_pitch_hw = <optimized out> ret = <optimized out> flush = <optimized out> r = 1 i = <optimized out> src_obj = {pitch = 0, width = 0, height = 0, bpp = 7680, domain = 2, bo = 0x7f402c48d5a9 <RADEONEXAPixmapIsOffscreen+9>, tiling_flags = 833354896, surface = 0x7f402b838c4b <exaPixmapHasGpuCopy_mixed+107>} dst_obj = {pitch = 732201792, width = 32576, height = 742970793, bpp = 32576, domain = 833354896, bo = 0x7f402b838c4b <exaPixmapHasGpuCopy_mixed+107>, tiling_flags = 802021200, surface = 0x7f4031abfc90} height = <optimized out> base_align = <optimized out> ProblemType: Crash DistroRelease: Ubuntu 13.04 Package: xserver-xorg-core 2:1.13.1.901-0ubuntu1 ProcVersionSignature: Ubuntu 3.8.0-1.5-generic 3.8.0-rc4 Uname: Linux 3.8.0-1-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.8-0ubuntu2 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CurrentDmesg: [ 21.194501] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 578.683634] UDF-fs: Partition marked readonly; forcing readonly mount [ 578.718337] UDF-fs: INFO Mounting volume 'BBCDVD3285', timestamp 2010/09/28 00:04 (1294) Date: Sun Jan 20 17:04:11 2013 DistUpgraded: 2012-12-06 19:10:29,781 DEBUG enabling apt cron job DistroCodename: raring DistroVariant: ubuntu ExecutablePath: /usr/bin/Xorg ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Advanced Micro Devices [AMD] nee ATI RV730XT [Radeon HD 4670] [1002:9490] (prog-if 00 [VGA controller]) Subsystem: Giga-byte Technology Device [1458:21b2] InstallationDate: Installed on 2012-09-09 (132 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120905.2) MachineType: Gigabyte Technology Co., Ltd. GA-MA780G-UD3H MarkForUpload: True ProcCmdline: /usr/bin/X :1 -core -auth /var/run/lightdm/root/:1 -nolisten tcp vt8 -novtswitch ProcEnviron: ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.8.0-1-generic root=UUID=e9e28db6-3c36-4e13-bea1-017b97bd28d8 ro quiet splash vt.handoff=7 Signal: 6 SourcePackage: xorg-server StacktraceTop: ?? () from /lib/x86_64-linux-gnu/libc.so.6 ?? () from /usr/lib/xorg/modules/drivers/radeon_drv.so ?? () from /usr/lib/xorg/modules/libexa.so ?? () ?? () Title: Xorg crashed with SIGABRT UpgradeStatus: Upgraded to raring on 2012-12-06 (44 days ago) UserGroups: dmi.bios.date: 12/30/2008 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F1 dmi.board.name: GA-MA780G-UD3H dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF1:bd12/30/2008:svnGigabyteTechnologyCo.,Ltd.:pnGA-MA780G-UD3H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-MA780G-UD3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-MA780G-UD3H dmi.sys.vendor: Gigabyte Technology Co., Ltd. version.compiz: compiz 1:0.9.9~daily13.01.17-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.41-0ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.1-0ubuntu1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.1-0ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.13.1.901-0ubuntu1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.0.0-0ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.18-0ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.6-0ubuntu1 xserver.bootTime: Sun Jan 20 17:05:39 2013 xserver.configfile: default xserver.devices: input Power Button KEYBOARD, id 6 input Power Button KEYBOARD, id 7 input USB Keyboard KEYBOARD, id 8 input USB Keyboard KEYBOARD, id 9 input USB Optical Mouse MOUSE, id 10 xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.13.1.901-0ubuntu1 xserver.video_driver: radeon To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1101989/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp