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From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 40622] New: [radeon] - kms wrong resolution mode used after
backlight on/off switch
Date: Fri, 5 Aug 2011 20:10:30 GMT
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https://bugzilla.kernel.org/show_bug.cgi?id=40622
Summary: [radeon] - kms wrong resolution mode used after
backlight on/off switch
Product: Drivers
Version: 2.5
Kernel Version: 3.0
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: Video(DRI - non Intel)
AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
ReportedBy: tkrah@fachschaft.imn.htwk-leipzig.de
Regression: Yes
Hi,
updated to recent 3.0 kernel (oneiric ubuntu build package) and got some
behaviour i would not expect.
Got a Samsung P35 Notebook - pressing my "backlight" Key does give this in
dmesg:
keyboard: can't emulate rawmode for keycode 240
On and Off, both a mesage.
The native resolution is 1400x1050 of my LVDS Panel.
[ 23.577259] [drm] Panel ID String: Samsung LTN150P1-L02
[ 23.577264] [drm] Panel Size 1400x1050
But after pressing backlight twice (off+on) my screen resolution does change to
1600x1024 - afaik not supported, at least it is not mentioned in Xorg.0.log for
detected valid panel Modelines.
But it does use this mode after backlight switch:
(II) RADEON(0): Allocate new frame buffer 1600x1024 stride 1600
I wonder why?
However i am forced to switch my resolution back everytime - don't know if its
good for the panel to use this resolution (because i don't know if it will
blast my panel away i'll set prio to high - if this won't going to happen
please set it back to normal ;-) ).
Bug or Feature? Both (message and resolution change) did not happen with
2.6.32.x before, so i guess its a regression, is it?
Tell me if you need more input or kernel testing.
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