My daughter was running ppracer in a KDE3.5 session when the system stopped cold. At least, the UI, Xorg was frozen, no escape ctrl/alt/F1 to console. After reboot, had a slew of these in the logs: Nov 11 20:55:15 d_baron kernel: [drm:drm_lock_take] ERROR 1 holds heavyweight lock Running 2.6.31 kernel. TKO :-) -- What happened?