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Never freezes? Also not true, although it seldom happens - and can almost always be unfrozen without the need to resort to a hard reboot.
Still happens to me. About once a month, I come home and the screensaver is frozen. No mouse response, no Ctrl-Alt-F1, no nothin'. I suspect it may be the DMA errors my hard drive was throwing my way about 6 months ago, causing random slowdown->window freeze->total lockup glitches. I have a script that I ran at the first sign of trouble which would write dmesg|tail to another disk every 5 seconds until it came down, and that's how I learned it was DMA errors. Been keeping Unison backups ever since just in case. Windows no matter what hardware I was on would do strange things and freeze up every once in a while, but I had no idea how to go about pinning down the issue.















