Public bug reported:
My guest machine has Xubuntu 14.04.3 LTS installed and uses autologin.
It boots successfully but if I try to log off and then log on into
another account, during loggin on some crash happens and it goes back to
lightdm. In syslog I found the following:
Sep 9 23:24:56 desktop spice-vdagentd: opening vdagent virtio channel
Sep 9 23:24:56 desktop kernel: [ 2640.545517] input: spice vdagent tablet as
/devices/virtual/input/input7
Sep 9 23:25:55 desktop kernel: [ 2700.313900] ------------[ cut here
]------------
Sep 9 23:25:55 desktop kernel: [ 2700.313923] WARNING: CPU: 0 PID: 1200 at
/build/linux-lts-vivid-BZwsXG/linux-lts-vivid-3.19.0/include/drm/ttm/ttm_bo_driver.h:855
qxl_surface_id_alloc+0x306/0x390 [qxl]()
Sep 9 23:25:55 desktop kernel: [ 2700.313925] Modules linked in: ufs qnx4
hfsplus hfs minix ntfs msdos jfs xfs libcrc32c cpuid joydev rfcomm bnep
bluetooth snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec
snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq kvm_intel
snd_seq_device kvm snd_timer serio_raw snd qxl ttm drm_kms_helper drm soundcore
i2c_piix4 8250_fintek mac_hid parport_pc ppdev lp parport btrfs xor raid6_pq
psmouse sym53c8xx scsi_transport_spi floppy pata_acpi
Sep 9 23:25:55 desktop kernel: [ 2700.317404] CPU: 0 PID: 1200 Comm: Xorg Not
tainted 3.19.0-26-generic #28~14.04.1-Ubuntu
Sep 9 23:25:55 desktop kernel: [ 2700.330373] Hardware name: QEMU Standard PC
(i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Sep 9 23:25:55 desktop kernel: [ 2700.330381] ffffffffc02c7660
ffff88006a5afb98 ffffffff817aeed7 0000000000000000
Sep 9 23:25:55 desktop kernel: [ 2700.330401] 0000000000000000
ffff88006a5afbd8 ffffffff81074d8a ffff88006051ade0
Sep 9 23:25:55 desktop kernel: [ 2700.330417] ffff880004793400
0000000000000402 ffff880004793458 ffff88007b12e000
Sep 9 23:25:55 desktop kernel: [ 2700.330422] Call Trace:
Sep 9 23:25:55 desktop kernel: [ 2700.334321] [<ffffffff817aeed7>]
dump_stack+0x45/0x57
Sep 9 23:25:55 desktop kernel: [ 2700.364142] [<ffffffff81074d8a>]
warn_slowpath_common+0x8a/0xc0
Sep 9 23:25:55 desktop kernel: [ 2700.364165] [<ffffffff81074e7a>]
warn_slowpath_null+0x1a/0x20
Sep 9 23:25:55 desktop kernel: [ 2700.364178] [<ffffffffc02c2026>]
qxl_surface_id_alloc+0x306/0x390 [qxl]
Sep 9 23:25:55 desktop kernel: [ 2700.364184] [<ffffffffc02c0732>]
qxl_bo_check_id+0x32/0x50 [qxl]
Sep 9 23:25:55 desktop kernel: [ 2700.364190] [<ffffffffc02c4afb>]
qxl_release_reserve_list+0xeb/0x110 [qxl]
Sep 9 23:25:55 desktop kernel: [ 2700.364195] [<ffffffffc02c40ab>]
qxl_process_single_command+0x48b/0x7f0 [qxl]
Sep 9 23:25:55 desktop kernel: [ 2700.364200] [<ffffffffc02c444f>]
qxl_execbuffer_ioctl+0x3f/0x90 [qxl]
Sep 9 23:25:55 desktop kernel: [ 2700.364265] [<ffffffffc01fba4c>]
drm_ioctl+0x1ec/0x660 [drm]
Sep 9 23:25:55 desktop kernel: [ 2700.368147] [<ffffffff811ac885>] ?
do_mmap_pgoff+0x2f5/0x3c0
Sep 9 23:25:55 desktop kernel: [ 2700.376225] [<ffffffff811ffbf8>]
do_vfs_ioctl+0x2f8/0x510
Sep 9 23:25:55 desktop kernel: [ 2700.377236] [<ffffffff81062335>] ?
trace_do_page_fault+0x45/0x100
Sep 9 23:25:55 desktop kernel: [ 2700.377241] [<ffffffff811ffe91>]
SyS_ioctl+0x81/0xa0
Sep 9 23:25:55 desktop kernel: [ 2700.377945] [<ffffffff817b688d>]
system_call_fastpath+0x16/0x1b
Sep 9 23:25:55 desktop kernel: [ 2700.377949] ---[ end trace 162123e0358b110a
]---
Sep 9 23:26:00 desktop kernel: [ 2704.398492] ------------[ cut here
]------------
I'm not sure wich component crashes but it seems it is QXL or QEMU, or
may be the issue is in libvirt (?) Anyway please look at logs in
attachment.
Host: Kubuntu 15.10
Linux 4.2.0-7 x86_64
Libvirt: 1.2.16-2ubuntu9
Qemu: 2.3+dfsg-5ubuntu5
Guest:
Xubuntu/Kubuntu 14.04.3
Linux 3.19.0-28 x86_64/i386
xserver-xorg-video-qxl-lts-vivid: 0.1.1-0ubuntu6~trusty1
** Affects: libvirt
Importance: Undecided
Status: New
** Affects: xserver-xorg-video-qxl-lts-vivid (Ubuntu)
Importance: Undecided
Status: New
** Summary changed:
- qemu crash while relogging in guest
+ VM: crash while relogging in guest
** Also affects: libvirt
Importance: Undecided
Status: New
** No longer affects: libvirt (Ubuntu)
** Also affects: xserver-xorg-video-qxl-lts-vivid (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1494005
Title:
VM: crash while relogging in guest
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