Setup
- Lubuntu 12.04, XP dual boot
- ATI RS480 graphics
Problem I get random lockups about once every 3 hours or so.
Symptoms
- PC hangs with (typically) a small bar-code style square in top left quadrant of the screen or else a totally white screen.
- nothing entered at the keyboard causes any response (ALT SYSREQ b etc)
- power off/on is necessary to get going again
- has happened with both Firefox and Chromium, so can't blame the browser
- cannot ping or ssh to the PC from another device on the same LAN when it happens
- nothing is output on Netconsole (on the same LAN) at the moment of the lockup
- XP never locks up so it can't be bad memory
