Bug 7468

Summary: acpi makes x server start hang
Product: ACPI Reporter: Oswald Buddenhagen (ossi)
Component: Power-VideoAssignee: acpi_power-video
Status: CLOSED CODE_FIX    
Severity: normal    
Priority: P2    
Hardware: i386   
OS: Linux   
Kernel Version: 2.6.18.2 Subsystem:
Regression: --- Bisected commit-id:

Description Oswald Buddenhagen 2006-11-07 23:26:47 UTC 
Most recent kernel where this bug did not occur: 2.6.17.<last>
Distribution: debian unstable
Hardware Environment: ASUS P4GE-V board (i845G), p4 2.4GHz, 1G RAM
Software Environment: xorg 7.1.1, xserver-xorg-video-i810 1.7.2
Problem Description:

now this is really a weird one. the X server hangs (with ca. 50% CPU) during 
the initial mode switch. but this happens *only* when the computer powered on 
itself via rtc alarm - using the power switch or power-on via keyboard does 
not trigger it. after recovery via hitting the reset switch it doesn't happen, 
either. booting with acpi=off makes the problem go away. it is 100% 
reproducible.

Steps to reproduce:

nvram-wakeup --settime `date +%s -d +1min`
halt

i assume one can simply boot into the bios, configure an alarm wakeup, reboot 
and hit the power switch ...
Comment 1 Oswald Buddenhagen 2006-11-30 22:27:06 UTC 
problem disappeared in 2.6.19.