I see the similar output from Planeshift on Edgy AMD64 X2 My Planeshift do not crash is just freezes up the whole computer for long periods. Warning: Keep in mind that the both my Planeshift and the Nvidia driver below is not part of Edgy so I just post this to maybe give more clues the puzzle. Ill see if I can downgrade nvidia driver and get the problem in ppracer. I tried to fix it by switching to later NVidia driver from http://albertomilone.com/driver.html But I still have the same problem but the output below is NOT from the stock Edgy drivers I got the same problem from PPracer also, but it don't start now since my driver upgrade Ill try to downgrade NVidia drivers and see if I can compare the output. PPracer and Planeshift is the only 3d stuff I execute (well glxgears also :) And I just tried so this might have been broken in my setup for a long time. ---------------- uname -a Linux dual 2.6.17-10-generic #2 SMP Fri Oct 13 15:34:39 UTC 2006 x86_64 GNU/Linux --------------- glxgears -info (Driver and GFX Card part) GL_RENDERER = GeForce 7600 GS/PCI/SSE2 GL_VERSION = 2.1.0 NVIDIA 96.29 ----------------dmesg (after a planeshift run) [80029.615236] NVRM: Xid (0005:00): 8, Channel 00000002 [80029.615782] NVRM: Xid (0005:00): 29, L1 -> L0 [80041.610574] NVRM: Xid (0005:00): 8, Channel 00000002 [80041.611114] NVRM: Xid (0005:00): 29, L1 -> L0 [80090.323869] BUG: soft lockup detected on CPU#0! [80090.323875] [80090.323876] Call Trace: {softlockup_tick+250} [80090.323905] {update_process_times+87} {smp_local_timer_interrupt+35} [80090.323918] {smp_apic_timer_interrupt+65} {apic_timer_interrupt+98} [80090.323932] {:nvidia:_nv002718rm+15} {:nvidia:_nv005705rm+125} [80090.324202] {:nvidia:_nv001077rm+25} {:nvidia:_nv001095rm+214} [80090.324417] {:nvidia:_nv006026rm+132} {:nvidia:_nv007709rm+288} [80090.324662] {:nvidia:_nv006668rm+231} {:nvidia:_nv006381rm+322} [80090.324901] {:nvidia:_nv002451rm+0} {:nvidia:_nv001071rm+319} [80090.325117] {:nvidia:_nv002451rm+0} {:nvidia:_nv001063rm+175} [80090.325326] {:nvidia:_nv002933rm+39} {:nvidia:_nv005705rm+125} [80090.325526] {:nvidia:_nv001078rm+58} {:nvidia:_nv002933rm+39} [80090.325713] {:nvidia:_nv005905rm+38} {:nvidia:_nv003994rm+710} [80090.325956] {:nvidia:_nv004002rm+139} {:nvidia:_nv001993rm+153} [80090.326157] {:nvidia:rm_isr_bh+83} {:nvidia:nv_kern_isr_bh+22} [80090.326332] {tasklet_action+102} {__do_softirq+95} [80090.326347] {call_softirq+30} {do_softirq+44} [80090.326358] {do_IRQ+71} {ret_from_intr+0} [80090.326376] {do_ioctl+54} {do_ioctl+47} [80090.326389] {vfs_ioctl+659} {sys_rt_sigreturn+691} [80090.326401] {sys_ioctl+108} {system_call+126} [80102.301369] NVRM: Xid (0005:00): 8, Channel 00000020 [80102.301903] NVRM: Xid (0005:00): 29, L1 -> L0 [80106.301109] NVRM: Xid (0005:00): 9, Channel 00000020 Instance 00000000 Intr 00100000 [80106.301643] NVRM: Xid (0005:00): 29, L0 -> L0 [80114.302737] NVRM: Xid (0005:00): 8, Channel 00000002 [80114.303281] NVRM: Xid (0005:00): 29, L1 -> L0 -------------------------------------------------------------------