Bug 16689

Summary:	radeon driver: conflict between manual backlight switch off and auto
Product:	xorg	Reporter:	heavytull <heavytull>
Component:	Driver/Radeon	Assignee:	xf86-video-ati maintainers <xorg-driver-ati>
Status:	RESOLVED NOTOURBUG	QA Contact:	Xorg Project Team <xorg-team>
Severity:	major
Priority:	high	CC:	lafeuil
Version:	unspecified
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description heavytull 2008-07-12 14:47:44 UTC

when i intend to leave my laptop for a while I manually switch OFF the backlight of the screen by pressing Fn+F4 keys, otherwise i just leave it ON and after 10min (ACPI settings) it gets OFF automatically. It appears that if I manually switch OFF the backlight and leave it OFF for the time of ACPI auto OFF, then I can switch back ON the backlight by just moving the mouse or pressing any key on the keyboard once. But if I press a second time any key, then i get a blank screen (backlight ON) and the computer is in a "hung" mode, then I have to switch manually OFF the backlight again and switch it ON again by pressing any key on the keyboard.

I say it is in a "hung" mode because If all happens while the computer plays music, then the music stops when the screen is blank.

I'm using the default slackware 12.1 with its generic kernel (2.6.24.5-smp)

Comment 1 Alex Deucher 2010-10-19 16:35:39 UTC

sounds like an acpi issue.

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