I have the same problem with 2.6.28. The old 2.6.27 kernels work well. I only use kernels shipped by Ubuntu.
With 2.6.28 the display hangs at about 10 minutes after startup (+-5). The mouse pointer moves, but the mouse buttons and the keyboard do not work. The display is freezed, clock does not work, etc. I used to hit Alt-SysRq K several times, and Ctrl-Alt-Del then. Sometimes I managed to get a console after some SysRq-K and Ctrl-Alt-F1, tried to run X, but I had to kill it again by SysRq-K.
I have ThinkPad R61 with an integrated Intel chipset:
I have the same problem with 2.6.28. The old 2.6.27 kernels work well. I only use kernels shipped by Ubuntu.
With 2.6.28 the display hangs at about 10 minutes after startup (+-5). The mouse pointer moves, but the mouse buttons and the keyboard do not work. The display is freezed, clock does not work, etc. I used to hit Alt-SysRq K several times, and Ctrl-Alt-Del then. Sometimes I managed to get a console after some SysRq-K and Ctrl-Alt-F1, tried to run X, but I had to kill it again by SysRq-K.
I have ThinkPad R61 with an integrated Intel chipset:
00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c)
00:02.1 Display controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c)