Henri Sivonen, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .
If it remains an issue, could you run the following command in the development release from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report. apport-collect -p linux <replace-with-bug-number> Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream- testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'. Please let us know your results. Thanks in advance. ** Tags removed: crash hardy ** Tags added: needs-upstream-testing regression-release ** Description changed: Binary package hint: xorg I upgraded from Karmic to Lucid (64-bit). Previously with Karmic, I have been able to disconnect and reconnect my USB input devices (Kinesis Advantage USB keyboard and Wacom Graphire 2 tablet connected to an Apple Cinema Display connected to a Belkin KVM switch) by using the KVM switch. Now with Lucid, switching the USB devices back to the Ubuntu box sometimes crashes X when the Wacom tablet is detected. Details: * The KVM switch identifies itself as No brand Combo Free KVM - 10d5:5000 Uni Class Technology Co., Ltd * The KVM switch has dedicated ports for mouse and keyboard for the purpose of faking the continuous presence of the mouse and keyboard to two computers. That function of the KVM switch doesn't work, so I have instead connected my input devices to a USB hub port of the KVM switch. Using this port is equivalent to disconnecting and reconnecting the USB devices when the KVM switch toggles between computers. * Typically, after reconnecting the Wacom tablet, it takes a couple of seconds for the LED on the tablet to light up and the tablet to become operational. This means I have a couple of seconds to see X when switching back to the Ubuntu box and X dies when the LED on the tablet lights up. * Once X dies, I see the kind of text briefly that one would sometimes see when shutting down a Ubuntu Live system. Then I'm taken back to the login screen. * If I switch back and forth quickly in order to provoke the problem, it doesn't happen. It seems to happen when the USB devices have been disconnected at least a couple of minutes before reconnecting. * If I press keys on the keyboard and/or try to tap the tablet with the tip of the stylus after connecting the devices but before the LED on the wacom tablet lights up, the crash is more probable. Backtrace from a provoked crash per the last point above: Program received signal SIGSEGV, Segmentation fault. 0x0000000000438a10 in IsMaster () (gdb) backtrace full #0 0x0000000000438a10 in IsMaster () No symbol table info available. #1 0x000000000045bbf9 in miPointerGetScreen () No symbol table info available. #2 0x00007f34ffe6bd9e in ?? () from /usr/lib/xorg/modules/input/wacom_drv.so No symbol table info available. #3 0x00007f34ffe6f72b in ?? () from /usr/lib/xorg/modules/input/wacom_drv.so No symbol table info available. #4 0x00007f34ffe68de3 in ?? () from /usr/lib/xorg/modules/input/wacom_drv.so No symbol table info available. #5 0x00007f34ffe68ead in ?? () from /usr/lib/xorg/modules/input/wacom_drv.so No symbol table info available. #6 0x000000000046fca7 in ?? () No symbol table info available. #7 0x000000000051d1c3 in ?? () No symbol table info available. #8 <signal handler called> No symbol table info available. #9 0x00007f3505cfa980 in __close_nocancel () at ../sysdeps/unix/syscall-template.S:82 No locals. #10 0x00007f34ffe6cee0 in ?? () from /usr/lib/xorg/modules/input/wacom_drv.so No symbol table info available. #11 0x000000000047d5d7 in ?? () No symbol table info available. #12 0x000000000047d9eb in ?? () No symbol table info available. #13 0x00007f34ffe71fbf in ?? () from /usr/lib/xorg/modules/input/wacom_drv.so No symbol table info available. #14 0x00007f34ffe6cf6a in ?? () from /usr/lib/xorg/modules/input/wacom_drv.so No symbol table info available. #15 0x000000000047d5d7 in ?? () No symbol table info available. #16 0x000000000047d9eb in ?? () No symbol table info available. #17 0x000000000045a702 in ?? () No symbol table info available. #18 0x000000000045a938 in ?? () No symbol table info available. #19 0x0000000000435f2b in WakeupHandler () No symbol table info available. #20 0x000000000045f997 in WaitForSomething () No symbol table info available. #21 0x0000000000430952 in ?? () No symbol table info available. #22 0x00000000004261aa in _start () No symbol table info available. + WORKAROUND: The problem is solved by applying the patch from + http://sourceforge.net/mailarchive/forum.php?thread_name=aanlktinbx2rug9n7v1ugqk4zcyylupdsne4nye5n2%2...@mail.gmail.com&forum_name + =linuxwacom-devel to the wacom driver. + + Patched xf86-input-wacom is available in my PPA: + https://launchpad.net/~hsivonen/+archive/ppa + ProblemType: Bug DistroRelease: Ubuntu 10.04 Package: xorg 1:7.5+5ubuntu1 ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2 Uname: Linux 2.6.32-22-generic x86_64 NonfreeKernelModules: nvidia Architecture: amd64 Date: Tue Jun 29 15:33:20 2010 DkmsStatus: - nvidia-current, 195.36.24, 2.6.32-22-generic, x86_64: installed - virtualbox-ose-guest, 3.1.6, 2.6.32-22-generic, x86_64: installed - virtualbox-ose, 3.1.6, 2.6.32-22-generic, x86_64: installed + nvidia-current, 195.36.24, 2.6.32-22-generic, x86_64: installed + virtualbox-ose-guest, 3.1.6, 2.6.32-22-generic, x86_64: installed + virtualbox-ose, 3.1.6, 2.6.32-22-generic, x86_64: installed EcryptfsInUse: Yes InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027) MachineType: Shuttle Inc. SX58 ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic root=UUID=3e7e293d-889e-4f5e-aac7-a0067e6f9bdb ro quiet splash ProcEnviron: - LANG=en_US.utf8 - SHELL=/bin/bash + LANG=en_US.utf8 + SHELL=/bin/bash SourcePackage: xorg dmi.bios.date: 05/21/2009 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 080016 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: SX58 dmi.board.vendor: Shuttle Inc. dmi.board.version: V10 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Intel dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr080016:bd05/21/2009:svnShuttleInc.:pnSX58:pvrV10:rvnShuttleInc.:rnSX58:rvrV10:cvnIntel:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: SX58 dmi.product.version: V10 dmi.sys.vendor: Shuttle Inc. system: - distro: Ubuntu - codename: lucid - architecture: x86_64 - kernel: 2.6.32-22-generic + distro: Ubuntu + codename: lucid + architecture: x86_64 + kernel: 2.6.32-22-generic ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/599781 Title: X crashes when reconnecting USB devices via a KVM switch To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/599781/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
