SEGFAULT in Xephyr

[Alistair Buxton]

Binary package hint: xserver-xephyr

Xephyr version: 2:1.6.0-0ubuntu14
Ubuntu version: 9.04

Steps to reproduce:
1. Install the Maemo 4.1.2 SDK from maemo.org
2. Launch the Maemo device emulator as instructed, including starting Xephyr:
         Xephyr :2 -host-cursor -screen 800x480x16 -dpi 96 -ac -extension Composite
3. Click on the Maemo main menu icon in the emulated device.

Xephyr output:

al@al-desktop:~$ Xephyr :2 -host-cursor -screen 800x480x16 -dpi 96 -ac -extension Composite
[dix] Could not init font path element /usr/share/fonts/X11/cyrillic, removing from list!
[config/dbus] couldn't take over org.x.config: org.freedesktop.DBus.Error.AccessDenied (Connection ":1.2872" is not allowed to own the service "org.x.config.display2" due to security policies in the configuration file)
unrecognised device identifier!
(EE) config/hal: NewInputDeviceRequest failed (2)
unrecognised device identifier!
(EE) config/hal: NewInputDeviceRequest failed (2)
unrecognised device identifier!
(EE) config/hal: NewInputDeviceRequest failed (2)

Backtrace (10 deep):
0: Xephyr(KdBacktrace+0x35) [0x80c1595]
1: /lib/tls/i686/cmov/libc.so.6 [0xb7ad6778]
2: Xephyr(DeliverDeviceEvents+0x20f) [0x808fabf]
3: Xephyr(ProcessOtherEvent+0x36c) [0x81910cc]
4: Xephyr(mieqProcessInputEvents+0x372) [0x80f0da2]
5: Xephyr(ProcessInputEvents+0xd) [0x80c620d]
6: Xephyr(Dispatch+0x6e) [0x80b329e]
7: Xephyr(main+0x3bd) [0x809869d]
8: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb7ac1775]
9: Xephyr [0x8070741]

Fatal server error:
Segmentation fault caught

Aborted

[Peter Hutterer (peter-hutterer)]

Created an attachment (id=25712)
0001-kdrive-set-Activate-Deactivate-grab-for-input-device.patch

Please give this patch a try (compile-tested only).

[Ext-istvan-visegradi (ext-istvan-visegradi)]

(In reply to comment #1)
> Created an attachment (id=25712) [details]
> 0001-kdrive-set-Activate-Deactivate-grab-for-input-device.patch
>
> Please give this patch a try (compile-tested only).
>

I have tested the patch in my environment (xorg-server-1.6.0) and it is fixing my problem. No crashes anymore and the variables, that was zero earlier, now are filled with something.

Do you know how can it be "pushed" to be in between the Ubuntu Jaunty normal fixes? They have the older 1.6.0 server still in use...

Thanks for the quick fix.

[Peter Hutterer (peter-hutterer)]

pushed as 6f9e22049862ee9ac7f604411d005d8bb1b2dd1c and b1b5ec45c1cb650ccb8c659218f9481379c777d9

[Peter Hutterer (peter-hutterer)]

*** Bug 22024 has been marked as a duplicate of this bug. ***

[Hubert Figuiere (hub)]

the patch isn't in the 1.6 branch. Can we get it there too?

(origin/server-1.6-branch)

[Peter Hutterer (peter-hutterer)]

Nominated for 1.6.3. See http://www.x.org/wiki/Server16Branch

[Alistair Buxton (a-j-buxton)]

Binary package hint: xserver-xephyr

Xephyr version: 2:1.6.0-0ubuntu14
Ubuntu version: 9.04

Steps to reproduce:
1. Install the Maemo 4.1.2 SDK from maemo.org
2. Launch the Maemo device emulator as instructed, including starting Xephyr:
         Xephyr :2 -host-cursor -screen 800x480x16 -dpi 96 -ac -extension Composite
3. Click on the Maemo main menu icon in the emulated device.

Xephyr output:

al@al-desktop:~$ Xephyr :2 -host-cursor -screen 800x480x16 -dpi 96 -ac -extension Composite
[dix] Could not init font path element /usr/share/fonts/X11/cyrillic, removing from list!
[config/dbus] couldn't take over org.x.config: org.freedesktop.DBus.Error.AccessDenied (Connection ":1.2872" is not allowed to own the service "org.x.config.display2" due to security policies in the configuration file)
unrecognised device identifier!
(EE) config/hal: NewInputDeviceRequest failed (2)
unrecognised device identifier!
(EE) config/hal: NewInputDeviceRequest failed (2)
unrecognised device identifier!
(EE) config/hal: NewInputDeviceRequest failed (2)

Backtrace (10 deep):
0: Xephyr(KdBacktrace+0x35) [0x80c1595]
1: /lib/tls/i686/cmov/libc.so.6 [0xb7ad6778]
2: Xephyr(DeliverDeviceEvents+0x20f) [0x808fabf]
3: Xephyr(ProcessOtherEvent+0x36c) [0x81910cc]
4: Xephyr(mieqProcessInputEvents+0x372) [0x80f0da2]
5: Xephyr(ProcessInputEvents+0xd) [0x80c620d]
6: Xephyr(Dispatch+0x6e) [0x80b329e]
7: Xephyr(main+0x3bd) [0x809869d]
8: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb7ac1775]
9: Xephyr [0x8070741]

Fatal server error:
Segmentation fault caught

Aborted

[Bryce Harrington (bryce)]

Hi a-j-buxton,

Please attach the output of `lspci -vvnn` and `dmesg`, and attach your /var/log/Xorg.0.log (and maybe Xorg.0.log.old) file from after reproducing this issue. If you're using a custom /etc/X11/xorg.conf please attach that as well.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Alistair Buxton (a-j-buxton)]

Are you sure? Xephyr is a nested X server. It does not touch any hardware, does not write to dmesg and does not create a log file. Attaching requested files anyway, even though they do not show anything useful.

[Bryce Harrington (bryce)]

[This is an automatic notification.]

Hi Alistair,

This bug was reported against an earlier version of Ubuntu, can you
test if it still occurs on Lucid?

Please note we also provide technical support for older versions of
Ubuntu, but not in the bug tracker. Instead, to raise the issue through
normal support channels, please see:

    http://www.ubuntu.com/support

If you are the original reporter and can still reproduce the issue on
Lucid, please run the following command to refresh the report:

  apport-collect 423188

If you are not the original reporter, please file a new bug report, so
we can work with you as the original reporter instead (you can reference
bug 423188 in your report if you think it may be related):

  ubuntu-bug xorg

If by chance you can no longer reproduce the issue on Lucid or if you
feel it is no longer relevant, please mark the bug report 'Fix Released'
or 'Invalid' as appropriate, at the following URL:

  https://bugs.launchpad.net/ubuntu/+bug/423188

[Alistair Buxton (a-j-buxton)]

This bug was fixed upstream in xserver 1.6.1.902 and the fix is in Karmi and later.