xserver-xorg-driver-i810: Error in I830WaitLpRing(), now is -99922196, start is -99924197

[sardion]

Package: xserver-xorg-driver-i810
Version: 1:1.4.1.3-0ubuntu6
Severity: grave
Justification: causes non-serious data loss


Occasionally after the computer sits idle it hangs and I must reboot
by pressing power button.  This causes a shutdown cleanly.  No way to
access X or consoles after hang though.  In gdm.log is the
I830LWaitLPRing() which follows below.  No suspend/resume activity
need be involved nor anything detectable other than X running.  Happens
approx once a week, can't pin down a common circumstance.


Error in I830WaitLpRing(), now is -99922196, start is -99924197
pgetbl_ctl: 0x1ffe0001 pgetbl_err: 0x0
ipeir: 0 iphdr: 18800080
LP ring tail: c8 head: 0 len: 1f001 start 0
eir: 0 esr: 1 emr: ffff
instdone: ffc1 instpm: 0
memmode: 108 instps: 40
hwstam: ffff ier: 82 imr: 9 iir: 20
space: 130864 wanted 131064

Fatal server error:
lockup

Error in I830WaitLpRing(), now is -99920180, start is -99922181
pgetbl_ctl: 0x1ffe0001 pgetbl_err: 0x0
ipeir: 0 iphdr: 18800080
LP ring tail: d0 head: 0 len: 1f001 start 0
eir: 0 esr: 1 emr: ffff
instdone: ffc1 instpm: 0
memmode: 108 instps: 40
hwstam: ffff ier: 0 imr: ffff iir: 0
space: 130856 wanted 131064

FatalError re-entered, aborting
lockup


-- System Information:
Debian Release: testing/unstable
  APT prefers dapper-updates
  APT policy: (500, 'dapper-updates'), (500, 'dapper-security'), (500, 'dapper')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.15-26-386
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)

Versions of packages xserver-xorg-driver-i810 depends on:
ii  libc6                2.3.6-0ubuntu20     GNU C Library: Shared libraries an
ii  xserver-xorg-core    1:1.0.2-0ubuntu10.1 X.Org X server -- core server

xserver-xorg-driver-i810 recommends no packages.

-- no debconf information