Xorg crashes on resume from suspend ending the session or other vt switches -NewInputDeviceRequest+0x22d

[Shiv V]

Upon resume from suspend, I don't get the gnome-screensaver password dialog. Instead I get the GDM login screen. After I login, the output of /usr/bin/w shows that my previous session is no longer running and that the new session is on a different vt from the one that ended. The Xorg.0.log.old has a backtrace in the end that includes "Saw signal 11. Server aborting". This has happened twice in a row with identical Xorg.0.log.old files (attached). I didn't have this issue with intrepid. Any ideas?

Setup:
* MacbookPro2,2
* Ubuntu 9.04 Alpha

* xorg.conf:
Section "Device"
        Identifier "Configured Video Device"
        Driver "radeon"
        Option "AccelMethod" "EXA"
        Option "DRI" "on"
EndSection
Section "Monitor"
        Identifier "Configured Monitor"
EndSection
Section "Screen"
        Identifier "Default Screen"
        Monitor "Configured Monitor"
        Device "Configured Video Device"
        SubSection "Display"
                Virtual 3360 2100
                ViewPort 0 0
        EndSubSection
EndSection

* Backtrace from end of /var/log/Xorg.0.log.old:
Backtrace:
0: /usr/X11R6/bin/X(xorg_backtrace+0x26) [0x4ef056]
1: /usr/X11R6/bin/X(xf86SigHandler+0x41) [0x483a51]
2: /lib/libc.so.6 [0x7f15aa070030]
3: /usr/X11R6/bin/X(CheckMotion+0x3b) [0x45708b]
4: /usr/X11R6/bin/X [0x494bdc]
5: /usr/X11R6/bin/X(NewInputDeviceRequest+0x22d) [0x494e8d]
6: /usr/X11R6/bin/X [0x46acde]
7: /usr/lib/libhal.so.1 [0x7f15ab261ed9]
8: /lib/libdbus-1.so.3(dbus_connection_dispatch+0x33b) [0x7f15ab02790b]
9: /lib/libdbus-1.so.3 [0x7f15ab027ccb]
10: /usr/X11R6/bin/X [0x46a07b]
11: /usr/X11R6/bin/X(WakeupHandler+0x4b) [0x4513db]
12: /usr/X11R6/bin/X(WaitForSomething+0x1ef) [0x4ecadf]
13: /usr/X11R6/bin/X(Dispatch+0x80) [0x44d5a0]
14: /usr/X11R6/bin/X(main+0x3bd) [0x4332bd]
15: /lib/libc.so.6(__libc_start_main+0xe6) [0x7f15aa05b586]
16: /usr/X11R6/bin/X [0x432749]
Saw signal 11. Server aborting.
(II) UnloadModule: "synaptics"
(II) Macintosh mouse button emulation: Close
(II) UnloadModule: "evdev"
(II) Mouseemu virtual mouse: Close
(II) UnloadModule: "evdev"
(II) Apple Computer Apple Internal Keyboard / Trackpad: Close
(II) UnloadModule: "evdev"
(II) Mouseemu virtual keyboard: Close
(II) UnloadModule: "evdev"
(II) HID 05ac:1000: Close
(II) UnloadModule: "evdev"
 ddxSigGiveUp: Closing log

[lspci]
00:00.0 Host bridge [0600]: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub [8086:27a0] (rev 03)
     Subsystem: Intel Corporation Device [8086:7270]
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc M56P [Radeon Mobility X1600] [1002:71c5]
     Subsystem: Apple Computer Inc. Device [106b:0080]

[Bryce Harrington (bryce)]

Hi svenkata,

Please attach the output of `lspci -vvnn` too.

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[Shiv V (svenkata)]

Here's the output of lspci -vvnn run as root. Some more things I have noticed:

(a) I do not always lose my session. Sometimes I get the gnome-screensaver password prompt
(b) I also lose my session sometimes when I switch to a text vt. AFAIK, vt switching also happens during suspend/resume by pm-suspend.

I don't know much about graphics and framebuffers and text modes, but it seems that this bug is being triggered by switching between virtual terminals, in particular from "graphics mode" to "text mode". Does that help?

[Bryce Harrington (bryce)]

Can you please collect a full backtrace? - see http://wiki.ubuntu.com/X/Backtracing for directions.

[Shiv V (svenkata)]

I'm not having this problem any more :) Here are a few things that have changed:

before -> during -> after the problem:
xserver-xorg: 1:7.4~5ubuntu3 (last intrepid) -> first jaunty version through 1:7.4~5ubuntu10 -> 1:7.4~5ubuntu12
xserver-xorg-core: 2:1.5.2-2ubuntu3 (last intrepid) -> first jaunty version through 2:1.5.99.901-1ubuntu1 -> 2:1.5.99.902-0ubuntu1

I have also rolled back xserver-xorg-input-synaptics from 0.99.3-2ubuntu2 (jaunty) to 0.15.2-0ubuntu7 (intrepid) because of the overly-sensitive / unusable trackpad issue (LP: 320639, 321128 plus many duplicates)

[Bryce Harrington (bryce)]

Thanks for letting us know the issue is resolved.