[Bug 16086] New: radeon: blank screen and crash after switch on backlight

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=16086

           Summary: radeon: blank screen and crash after switch on backlight
           Product: xorg
           Version: 7.3
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: critical
          Priority: high
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: heavytull at hotmail.com
         QAContact: xorg-team at lists.x.org


I've been running slackware with the generic kernel provided since slack12.0.
my computer is a Fujitsu Siemens V2045 PRO, with the ATI radeom mobility X300
as Gcard.

I updated my system some days ago to the 12.1, i'm using radeon driver
Module radeon: vendor="X.Org Foundation"
        compiled for 1.4.0.90, module version = 4.3.0

I can switch off the screen backlight by pressing Fn+F4, I usually do that when
i'm off for some time and don't want to switch off the pc. I can do that only
since i recently updated to slack12.1.

The computer crashes when I press the Fn key for some purpose (for exemple to
switch on wifi) just after switching back on the backlight. The computer
crashes at the time i press Fn without any other key.
The crash is as follows: the screen gets blank but with backlight on. I cannot
do anything, even Ctrl+Alt+Del doesn't help. So I cannot have a backtrace of
the bug. I just press the ON/OFF button for some seconds to then start again
the computer.


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