Red Hat Bugzilla – Bug 448945
[intel] [broken DDC CRT] auto-switches from PreferredMode to 2048x1536 after desktop initialization
Last modified: 2009-07-14 13:42:25 EDT
i845G system on '19"' Dell P991 CRT display with dysfunctional DDC.
I installed F9 a few days after release announcement, and just Yum updated this
AM. I run system-config-display and choose either generic 1600x1200 display or
the Dell P991 display with 24bit 1600x1200 mode. system-config-display fails to
include any DisplaySize line. KDE via startx starts in 1600x1200, but before
desktop completes initialization, screen blanks, then repaints the current
1600x1200 view into the upper left corner, then repaints everything into
2048x1536 mode. When I go to log out without first switching from 2048x1536 to
1600x1200, the logout confirmation window opens centered in the 1600x1200 area
in the upper left corner instead of the usual center of entire screen. A check
of krandrtray shows nothing selected, with 2048x1536 at top of list. I can
choose 1600x1200, which it will switch to, but the DPI is wrong. Before using
krandrtray to switch from 2048x1536, DPI is a mere 96. After the switch to
1600x1200, Kinfocenter reports 75 DPI, a tiny fraction of what it should be. I
can improve the DPI by setting a DisplaySize in xorg.conf, but am unable to find
a way to keep in 1600x1200 mode.
I never tried previous Fedora releases on this system, but it totally behaves as
expected if I run the KDE's under Mandriva 2008.1, Mandriva Cooker and OpenSUSE
Factory and 10.3. In all of them, NoDDC, PreferredMode and DisplaySize all
produce expected results.
Created attachment 307103 [details]
xorg.conf made by system-config-display for generic 1600x1200 display
Created attachment 307104 [details]
Xorg.0.log from using attachment 307103 [details]
Created attachment 307105 [details]
xorg.conf made by system-config-display for Dell P991 display
Created attachment 307106 [details]
Xorg.0.log from using attachment 307105 [details]
Created attachment 307107 [details]
lspci -v output
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