https://bugzilla.kernel.org/show_bug.cgi?id=16389
Summary: New PM-Code produces white screen on laptop display on
startup on an radeon x700
Product: Drivers
Version: 2.5
Kernel Version: 2.6.35-rc4
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Video(DRI - non Intel)
AssignedTo: drivers_video-...@kernel-bugs.osdl.org
ReportedBy: kontrolla...@gmx.de
Regression: Yes
After the merge of the new-pm code for radeon it get an all white screen on my
laptop display as soon as kms gets activated. Before the merge it worked as
long as i used radeon.dynpm=1 as boot parameter (without this parameter i also
get an all white screen with earlier kernels).
I can work around it with an vbetool dpms off / on cycle (which uses bios
routines i think), i tried all options / combinations of radeon.hw_i2c and
radeon.new_pll without success. I also get an all white laptop-screen as soon
as i change resolutions on my display, this also can be workaround with an
vbetool dpms off / on cycle.
This also happens in the non-kms-case with the xorg-driver whenever i change
resolutions, in the old days i could workaround it with the MonitorLayout
"LVDS, none" option, however this option is long gone.
Chipset is an mobility radeon x700 pcie, pci-id is: 1002:5653
Please tell me what more information is needed.
Thank you
Jan Kreuzer
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