Comment 42 for bug 533784

I applied the second patch against the 2.6.32.8 kernel, and the results were mixed. The good news is that the random crashes have all but disappeared, at least with Quake Live. The not so good news is that exiting the game (fullscreen or otherwise) freezes the display - although strangely not the cursor. I can still log in to the machine via ssh, and doing so scraped dmesg:

BUG: unable to handle kernel NULL pointer dereference at 00000607
IP: [<f8988385>] 0xf8988385
*pde = 00000000
Oops: 0000 [#1] PREEMPT SMP
last sysfs file: /sys/devices/pci0000:00/0000:00:12.0/net/eth0/carrier
Modules linked in: pcmcia pcmcia_core snd_seq_oss radeon snd_seq_midi_event snd_seq ttm drm_kms_helper snd_pcm_oss snd_mixer_oss drm i2c_algo_bit iptable_mangle iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 iptable_filter ip_tables x_tables nls_iso8859_1 vfat fat video output lp fuse battery ac sg usb_storage snd_cs4236 snd_mpu401 snd_ens1371 snd_wavefront snd_ac97_codec snd_wss_lib ac97_bus snd_opl3_lib snd_pcm snd_hwdep snd_mpu401_uart snd_rawmidi snd_timer snd_seq_device fan snd via_agp parport_pc soundcore ns558 floppy parport i2c_viapro evdev gameport ehci_hcd via_rhine agpgart i2c_core snd_page_alloc uhci_hcd mii processor button thermal [last unloaded: pcmcia_core]

Pid: 1506, comm: icecat-bin Not tainted (2.6.32.8 #1) KT600-8237
EIP: 0060:[<f8988385>] EFLAGS: 00010202 CPU: 0
EAX: 00000607 EBX: f5f36c00 ECX: ded2be04 EDX: 05a005a0
ESI: 00000607 EDI: f5f36f08 EBP: 00000003 ESP: ded2bd8c
 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Process icecat-bin (pid: 1506, ti=ded2b000 task=e637cdc0 task.ti=ded2b000)
Stack:
 00000000 e637cf4c c052ccf4 00000286 e637cf48 c0530590 c011725e 00000001
<0> ded2be88 00000001 00000001 e62cd520 e62cd5dc 00000286 e62cd520 00000020
<0> ded2be58 e6371c60 c03d2f61 00000000 00000246 f5ee5000 f5f36f08 00000000
Call Trace:
 [<c011725e>] ? 0xc011725e
 [<c03d2f61>] ? 0xc03d2f61
 [<f898313e>] ? 0xf898313e
 [<c03d42dc>] ? 0xc03d42dc
 [<f8698acd>] ? 0xf8698acd
 [<c0127c61>] ? 0xc0127c61
 [<f86964cc>] ? 0xf86964cc
 [<f8983002>] ? 0xf8983002
 [<c015652d>] ? 0xc015652d
 [<c01375a5>] ? 0xc01375a5
 [<c015652d>] ? 0xc015652d
 [<c01710d9>] ? 0xc01710d9
 [<c0171600>] ? 0xc0171600
 [<c0159860>] ? 0xc0159860
 [<c01598eb>] ? 0xc01598eb
 [<c015a3e9>] ? 0xc015a3e9
 [<c0171671>] ? 0xc0171671
 [<c0102895>] ? 0xc0102895
Code: 89 d8 e8 31 f9 ff ff 85 c0 89 c6 c7 44 24 4c 00 00 00 00 0f 85 8e 1d 00 00 eb c8 ba 04 00 00 00 8d 4c 24 78 e8 b9 ae d0 ff 89 c6 <8a> 00 8d 50 ff 80 fa 08 0f 87 17 1d 00 00 0f b6 d2 ff 24 95 4c
EIP: [<f8988385>] SS:ESP 0068:ded2bd8c
CR2: 0000000000000607
---[ end trace 9cffec1ef74538ac ]---