Notebook: X51R-AP009A Graphics: ATI X1100 KUbuntu: 10.04 Scenario 1: System boot without AC, freeze after X server is loaded and screen weird fade. Scenario 2: AC is unpluged when is system run under X. System freeze in few seconds. Scenario 3: System is only in fb console, AC is unpluged. Nothing change until X is loaded.
Created attachment 37170 [details] dmesg
Can you test 2.6.34 and 2.6.35?
2.6.34 same. With 2.6.35-rc4 I was able quick use SYSRQ-RKV but then it freezed too.
Was there a previous kernel where this was not an issue?
no, even previous version of ubuntu had same problem
This sounds like a apci bug.
It's possible. That machine have perfectly fucked BIOS which refuse finish bios checks after reboot... And Ubuntu say something about supported but in BIOS blocked NX :-/
looks like busted acpi.
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