I have a desktop with Ubuntu 12.04 with Unity, fresh install about a year ago. Details:
Intel Core i5-3570K CPU @ 3.40GHz × 4, 4Gb RAM, 2 Tb HD, 64-bit
Ubuntu 12.04.5 LTS
~$ lspci | grep VGA:
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller (rev 09)
Since about 2 weeks ago my desktop freezes a lot during internet browsing -randomly at any website. It happens on Chromium, Chrome and Firefox, so probably not the browser issue. Everything freezes, mouse does not work, keyboard does not work ALT+SYSRQ+REISUB doesn't work, hard restart is the only option.
I am also getting crashes (not freezes) - kernel panic, spontaneous reboots, browser crashes. Occasionally I get a crash report indicating problem with Xorg. Today's crash listed: "Xorg crashed with SIGABRT in CloseWellKnownConnections()".
Any ideas? Thanks!