I have just started to play with Xen for the first time within the last few days, so I am open to the possibility that I have made a stupid mistake, but it looks to me that this is a very recent bug that is affecting more people than just me. For reference see: https://bugzilla.redhat.com/show_bug.cgi?id=1085074 and https://bugs.launchpad.net/ubuntu-gnome/+bug/1312484 I have added some information from my own setup to the Ubuntu bug report. Here is what I am seeing: * I have installed Ubuntu 14.04 onto a domU running under Xen 4.4 (with a Lubuntu 14.04 dom0 if it matters). * When I start up a vnc viewer to interact with the display, everything looks good. I can see the system boot up, and it comes up to the greeter (lightdm). * As long as I don't move the mouse over the VNC screen, the display seems pretty solid. I can interact with it via the keyboard to my heart's content, and it responds in every way as I would expect. * The instant the mouse enters the VNC window, Xorg crashes and goes back to the greeter screen. * I have re-tried with both lightdm and gdm on the domU, and with gvncviewer and ssvncviewer on the dom0. The behavior is very repeatable. Any recommendations? Here is the end of the Xorg.0.log file from one such crash: [ 2533.613] (EE) BUG: triggered 'if (dev->ptrfeed != ((void *)0))' [ 2533.613] (EE) BUG: ../../dix/devices.c:1476 in InitPtrFeedbackClassDeviceStruct() [ 2533.613] (EE) [ 2533.614] (EE) Backtrace: [ 2533.614] (EE) 0: /usr/bin/X (xorg_backtrace+0x48) [0x7f959a06bc78] [ 2533.614] (EE) 1: /usr/bin/X (InitPtrFeedbackClassDeviceStruct+0x50) [0x7f9599f0f240] [ 2533.614] (EE) 2: /usr/lib/xorg/modules/input/evdev_drv.so (0x7f958f02f000+0x470b) [0x7f958f03370b] [ 2533.615] (EE) 3: /usr/lib/xorg/modules/input/evdev_drv.so (0x7f958f02f000+0x66f3) [0x7f958f0356f3] [ 2533.615] (EE) 4: /usr/bin/X (ActivateDevice+0x37) [0x7f9599f0e677] [ 2533.615] (EE) 5: /usr/bin/X (0x7f9599ec3000+0xa1823) [0x7f9599f64823] [ 2533.616] (EE) 6: /usr/bin/X (0x7f9599ec3000+0xb716b) [0x7f9599f7a16b] [ 2533.616] (EE) 7: /usr/bin/X (0x7f9599ec3000+0xb76e3) [0x7f9599f7a6e3] [ 2533.616] (EE) 8: /usr/bin/X (config_init+0x9) [0x7f9599f79679] [ 2533.617] (EE) 9: /usr/bin/X (InitInput+0x9c) [0x7f9599f5853c] [ 2533.617] (EE) 10: /usr/bin/X (0x7f9599ec3000+0x59909) [0x7f9599f1c909] [ 2533.617] (EE) 11: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7f95979ffec5] [ 2533.617] (EE) 12: /usr/bin/X (0x7f9599ec3000+0x44e7e) [0x7f9599f07e7e] [ 2533.618] (EE) [ 2533.618] (EE) evdev: Xen Virtual Pointer: failed to initialize pointer feedback class device. [ 2533.619] (**) Xen Virtual Pointer: (accel) keeping acceleration scheme 1 [ 2533.619] (**) Xen Virtual Pointer: (accel) acceleration profile 0 [ 2533.619] (**) Xen Virtual Pointer: (accel) acceleration factor: 2.000 [ 2533.619] (**) Xen Virtual Pointer: (accel) acceleration threshold: 4 [ 2533.621] (II) config/udev: Adding input device Xen Virtual Pointer (/dev/input/js1) [ 2533.622] (**) Xen Virtual Pointer: Applying InputClass "Xen Virtual Pointer axis blacklist" [ 2533.622] (II) No input driver specified, ignoring this device. [ 2533.622] (II) This device may have been added with another device file. [ 2533.623] (II) config/udev: Adding input device Xen Virtual Pointer (/dev/input/mouse0) [ 2533.623] (**) Xen Virtual Pointer: Applying InputClass "Xen Virtual Pointer axis blacklist" [ 2533.623] (II) No input driver specified, ignoring this device. [ 2533.623] (II) This device may have been added with another device file. [ 2533.664] (EE) FBDEV(0): FBIOBLANK: Invalid argument [ 2538.103] (II) XKB: reuse xkmfile /var/lib/xkb/server-B20D7FC79C7F597315E3E501AEF10E0D866E8E92.xkm [ 2541.466] (EE) FBDEV(0): FBIOBLANK: Invalid argument [ 2541.475] (EE) FBDEV(0): FBIOBLANK: Invalid argument (EE) (EE) Backtrace: (EE) 0: /usr/bin/X (xorg_backtrace+0x48) [0x7f959a06bc78] (EE) 1: /usr/bin/X (0x7f9599ec3000+0x1ac969) [0x7f959a06f969] (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f9598fc0000+0x10340) [0x7f9598fd0340] (EE) 3: /usr/bin/X (valuator_mask_set_double+0x0) [0x7f9599f33060] (EE) 4: /usr/lib/xorg/modules/input/evdev_drv.so (0x7f958f02f000+0x586e) [0x7f958f03486e] (EE) 5: /usr/bin/X (0x7f9599ec3000+0x92e88) [0x7f9599f55e88] (EE) 6: /usr/bin/X (0x7f9599ec3000+0xbb530) [0x7f9599f7e530] (EE) 7: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f9598fc0000+0x10340) [0x7f9598fd0340] (EE) 8: /lib/x86_64-linux-gnu/libc.so.6 (__select+0x13) [0x7f9597ad0c13] (EE) 9: /usr/bin/X (WaitForSomething+0x1ac) [0x7f959a06921c] (EE) 10: /usr/bin/X (0x7f9599ec3000+0x55811) [0x7f9599f18811] (EE) 11: /usr/bin/X (0x7f9599ec3000+0x5994a) [0x7f9599f1c94a] (EE) 12: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7f95979ffec5] (EE) 13: /usr/bin/X (0x7f9599ec3000+0x44e7e) [0x7f9599f07e7e] (EE) (EE) Segmentation fault at address 0x0 (EE) Fatal server error: (EE) Caught signal 11 (Segmentation fault). Server aborting (EE) (EE) Please consult the The X.Org Foundation support at http://wiki.x.org for help. (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information. (EE) (EE) Server terminated with error (1). Closing log file. -- dan B hentschel dan@hentschels.com _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users