Comment 72 for bug 541511

(In reply to comment #70)
> If you want to help, please test my latest patch (v6) and report how it
> fares on your machine.

I've got a Thinkpad X40 with a rev 2 855GM chipset. With stock kernels my system is mostly stable, but X crashes now and then (depending on what I do, a couple times a week). Since KMS it's just the screen that freezes, except for the mouse pointer, and I can switch to console.

With your v7 patch applied on current git I get a full system hang fairly soon and easily. Because the system is stuck I can't get any error messages, but I didn't get any in dmesg before the hang (max retries was always 0, printed twice).

I do have the debugfs output, dmesg and Xorg.log after a hang with a plain current git kernel (2.6.34-rc3, HEAD at 0fdf86). Start of i915_error_state says:

Time: 1270672918 s 546381 us
PCI ID: 0x3582
EIR: 0x00000000
  PGTBL_ER: 0x00000000
  INSTPM: 0x00000000
  IPEIR: 0x00000000
  IPEHR: 0x41100000
  INSTDONE: 0x037fefc1
  ACTHD: 0x07c2a814
seqno: 0x000298f1

xorg-server 1.7.5.902, intel driver 2.10.0,

If there's anything I can do to help, please ask.

As I'm not interested in 3D, I'm starting to wonder why I shouldn't switch to the VGA driver. Surely that one is stable and not that much slower for 2D?