https://bugs.freedesktop.org/show_bug.cgi?id=66799
Priority: medium
Bug ID: 66799
Assignee: [email protected]
Summary: 1920x1080 height too large for virtual size (dual
radeon)
QA Contact: [email protected]
Severity: normal
Classification: Unclassified
OS: Linux (All)
Reporter: [email protected]
Hardware: x86-64 (AMD64)
Status: NEW
Version: unspecified
Component: Driver/Radeon
Product: xorg
Created attachment 82302
--> https://bugs.freedesktop.org/attachment.cgi?id=82302&action=edit
Xorg.0.log
Xorg exhibits several problems possibly because of Dual 4550 Radeon cards.
1) 66796 - radeon dual card configure segmentation fault
2) (this bug) - 1920x1080 height too large for virtual size (dual radeon)
3) (after #2 is fixed) xrandr -q lists only one screen for 2 cards, 2 monitors
Much time spent looking for cause why second monitor of a dual radeon (2 cards,
1 monitor each) remained blank when Xorg reported both cards and monitors
detected. Monitor on card1 is 1680x1050, monitor on card two is 1920x1080.
With no xorg.conf (default config) the 1680x1050 monitor would light up and the
1920x1080 would stay blank. Note the *informatory* message "[585135.723] (II)
RADEON(G0): Not using mode "1920x1080" (height too large for virtual size)" in
the Xorg.0.log file (in my opinion, if a significant bit of hardware is
disabled due to a resource problem, it should be a warning).
A workaround for this problem appears to be to create an xorg.conf file that
defines the virtual display size as large or larger than the physical screen
size.
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
SubSection "Display"
Virtual 1920 1088
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Card1"
Monitor "Monitor1"
SubSection "Display"
Virtual 1920 1088
EndSubSection
EndSection
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