Comment 34 for bug 507504

Me too, ever since I installed Lucid. Hardware runs Win XP faultlessly. RAM passes Memtest 86+ OK. Relevant extract from Syslog below. I was using Firefox, iGoogle and eBay at the time. I hope this will help someone to solve this major nuisance.

Jun 18 19:17:01 henry-desktop CRON[1368]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Jun 18 20:17:01 henry-desktop CRON[1430]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Jun 18 21:17:01 henry-desktop CRON[1489]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Jun 18 21:28:34 henry-desktop kernel: [ 9396.632014] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
Jun 18 21:28:34 henry-desktop kernel: [ 9396.632030] render error detected, EIR: 0x00000000
Jun 18 21:28:34 henry-desktop kernel: [ 9396.633117] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiting 143927 at 143923)
Jun 18 21:28:36 henry-desktop kernel: [ 9398.544018] [drm:i915_gem_idle] *ERROR* hardware wedged
Jun 18 21:28:36 henry-desktop gnome-session[971]: WARNING: Detected that screensaver has left the bus
Jun 18 21:28:37 henry-desktop acpid: client 850[0:0] has disconnected
Jun 18 21:28:37 henry-desktop acpid: client connected from 1565[0:0]
Jun 18 21:28:37 henry-desktop acpid: 1 client rule loaded
Jun 18 21:28:37 henry-desktop pulseaudio[1561]: pid.c: Stale PID file, overwriting.
Jun 18 21:28:37 henry-desktop pulseaudio[1561]: main.c: Unable to contact D-Bus: org.freedesktop.DBus.Error.NoServer: Failed to connect to socket /tmp/dbus-lysrGLPuDp: Connection refused
Jun 18 21:28:38 henry-desktop kernel: [ 9400.351255] [drm:i915_gem_entervt_ioctl] *ERROR* Reenabling wedged hardware, good luck
Jun 18 21:28:38 henry-desktop kernel: [ 9400.684014] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
Jun 18 21:28:38 henry-desktop kernel: [ 9400.684022] render error detected, EIR: 0x00000000
Jun 18 21:28:38 henry-desktop kernel: [ 9400.684860] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiting 143929 at 143923)
Jun 18 21:28:41 henry-desktop kernel: [ 9402.736015] [drm:i915_gem_idle] *ERROR* hardware wedged
Jun 18 21:28:41 henry-desktop acpid: client 1565[0:0] has disconnected
Jun 18 21:28:41 henry-desktop acpid: client connected from 1575[0:0]
Jun 18 21:28:41 henry-desktop acpid: 1 client rule loaded
Jun 18 21:28:42 henry-desktop kernel: [ 9403.855450] [drm:i915_gem_entervt_ioctl] *ERROR* Reenabling wedged hardware, good luck
Jun 18 21:28:42 henry-desktop kernel: [ 9404.196022] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
Jun 18 21:28:42 henry-desktop kernel: [ 9404.196032] render error detected, EIR: 0x00000000
Jun 18 21:28:42 henry-desktop kernel: [ 9404.196885] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiting 143931 at 143923)
Jun 18 21:28:44 henry-desktop kernel: [ 9406.248016] [drm:i915_gem_idle] *ERROR* hardware wedged
Jun 18 21:28:44 henry-desktop acpid: client 1575[0:0] has disconnected
Jun 18 21:28:44 henry-desktop acpid: client connected from 1583[0:0]
Jun 18 21:28:44 henry-desktop acpid: 1 client rule loaded
Jun 18 21:28:45 henry-desktop kernel: [ 9407.365253] [drm:i915_gem_entervt_ioctl] *ERROR* Reenabling wedged hardware, good luck
Jun 18 21:28:45 henry-desktop kernel: [ 9407.696022] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
Jun 18 21:28:45 henry-desktop kernel: [ 9407.696032] render error detected, EIR: 0x00000000
Jun 18 21:28:45 henry-desktop kernel: [ 9407.696886] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiting 143933 at 143923)
Jun 18 21:28:48 henry-desktop kernel: [ 9409.748016] [drm:i915_gem_idle] *ERROR* hardware wedged
Jun 18 21:28:48 henry-desktop kernel: Kernel logging (proc) stopped.
Jun 18 21:28:48 henry-desktop rsyslogd: [origin software="rsyslogd" swVersion="4.2.0" x-pid="601" x-info="http://www.rsyslog.com"] exiting on signal 15.
Jun 18 21:29:22 henry-desktop kernel: imklog 4.2.0, log source = /proc/kmsg started.
Jun 18 21:29:22 henry-desktop rsyslogd: [origin software="rsyslogd" swVersion="4.2.0" x-pid="596" x-info="http://www.rsyslog.com"] (re)start
Jun 18 21:29:22 henry-desktop rsyslogd: rsyslogd's groupid changed to 103
Jun 18 21:29:22 henry-desktop rsyslogd: rsyslogd's userid changed to 101
Jun 18 21:29:22 henry-desktop rsyslogd-2039: Could no open output file '/dev/xconsole' [try http://www.rsyslog.com/e/2039 ]
Jun 18 21:29:22 henry-desktop kernel: [ 0.000000] Initializing cgroup subsys cpuset