Comment 2 for bug 728923

my notebook lenovo T500, ati mobility hd 3650 with radeon os driver.
the following lines appears sometimes after login and system freezes with desktop background image. (killing x-server via sysreq is possible)
dmesg:
...
[ 40.690127] radeon 0000:01:00.0: GPU lockup CP stall for more than 10010msec
[ 40.690132] ------------[ cut here ]------------
[ 40.690160] WARNING: at /build/buildd/linux-2.6.38/drivers/gpu/drm/radeon/radeon_fence.c:248 radeon_fence_wait+0x36f/0x3e0 [radeon]()
[ 40.690164] Hardware name: 2082BSG
[ 40.690166] GPU lockup (waiting for 0x0000020C last fence id 0x00000209)
...

syslog
...
Apr 21 19:01:53 mobileibm pulseaudio[1352]: module-alsa-card.c: Failed to find a working profile.
Apr 21 19:01:53 mobileibm pulseaudio[1352]: module.c: Failed to load module "module-alsa-card" (argument: "device_id="29" name="platform-thinkpad_acpi" card_name="alsa_card.platform-thinkpad_acpi" tsched=yes ignore_dB=no card_properties="module-udev-detect.discovered=1""): initialization failed.
Ap
...
After killing x-server and switch to other tty...
...
Apr 21 19:02:43 mobileibm pulseaudio[1931]: main.c: Unable to contact D-Bus: org.freedesktop.DBus.Error.NoServer: Failed to connect to socket /tmp/dbus-4nJZ6KHt9r: Verbindungsaufbau abgelehnt
Apr 21 19:02:44 mobileibm kernel: [ 71.388521] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id
...
Apr 21 19:02:50 mobileibm pulseaudio[2090]: module-alsa-card.c: Failed to find a working profile.
Apr 21 19:02:50 mobileibm pulseaudio[2090]: module.c: Failed to load module "module-alsa-card" (argument: "device_id="29" name="platform-thinkpad_acpi" card_name="alsa_card.platform-thinkpad_acpi" tsched=yes ignore_dB=no card_properties="module-udev-detect.discovered=1""): initialization failed.
Apr 21 19:03:02 mobileibm kernel: [ 89.120180] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000msec
Apr 21 19:03:02 mobileibm kernel: [ 89.120189] ------------[ cut here ]------------
Apr 21 19:03:02 mobileibm kernel: [ 89.120239] WARNING: at /build/buildd/linux-2.6.38/drivers/gpu/drm/radeon/radeon_fence.c:248 radeon_fence_wait+0x36f/0x3e0 [radeon]()
Apr 21 19:03:02 mobileibm kernel: [ 89.120246] Hardware name: 2082BSG
Apr 21 19:03:02 mobileibm kernel: [ 89.120250] GPU lockup (waiting for 0x0000049E last fence id 0x0000049B)
...

after two restarts (sysreq) of x-server i can login and the system is running fine :-)