https://bugzilla.novell.com/show_bug.cgi?id=706024
https://bugzilla.novell.com/show_bug.cgi?id=706024#c12
Felix Miata changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEEDINFO |ASSIGNED
InfoProvider|mrmazda@earthlink.net |
--- Comment #12 from Felix Miata 2011-07-21 05:35:46 UTC ---
I thought so for a long time, but apparently it's video chip and/or driver
dependent. It turns out copy & paste from old working xorg.conf files is an
Intel booby trap: using 'Identifier "Monitor[0]"' instead of 'Identifier
"Default Monitor"' is a cause of unexpected results. It took a while to respond
because I was vexed by the differences between DVI NVidia behavior & those of
Intel & ATI, plus TargetRefreshRate, PreferredMode & DisplaySize not always
obeyed or not uniformly as a group.
To reproduce:
1-Connect KMS-supported Intel or ATI video 12.1M3 system to a CRT supporting
1600x1200, 1792x1536, 1856x1392, 1920x1440 & 2048x1536 at up to at least 85
refresh
2-Start X with no xorg.conf, and no regular files in xorg.conf.d/ except a
valid 50-monitor.conf containing:
Section "Monitor"
Identifier "Monitor[0]"
# Identifier "Default Monitor"
HorizSync 30-120
VertRefresh 56-86
Option "TargetRefreshRate" "60"
Option "DDC" "off"
Option "DefaultModes" "on"
DisplaySize 378 284 # 120 DPI @ 1792x1344
Option "PreferredMode" "1792x1344"
EndSection
Actual results:
1-96 DPI (intel, radeon)
2-1600x1200 resolution (intel, radeon)
3-85 refresh (intel, radeon)
4-black screen (nv/nouveau)
Expected results:
1-120 DPI
2-1792x1344 resolution
3-60 refresh
Comments:
1-exiting X, moving the comment from the Default Monitor line to the Monitor[0]
line, then startx produces expected results with intel, but not with radeon or
nouveau.
2-exiting X, leaving the comment at the Default Monitor line or moving it to
the Monitor[0] line, placing in xorg.conf.d/ the 1 July 50-device.conf &
50-screen.conf files from M3 rpms, then startx produces unexpected results with
radeon.
3-exiting X, moving the comment from the Default Monitor line to the Monitor[0]
line, placing in xorg.conf.d/ the 22 April 2010 50-device.conf & 50-screen.conf
files from M0 rpms (identical to 11.3's), then startx produces expected results
with radeon.
4-As long as there is no more than one 'Section "Monitor"' anywhere in
xorg.conf or /xorg.conf.d/, it ought not matter the identifier used in that one
and only non-default section, regardless of driver.
5-I still don't know why DVI 8600GT works in WinXP, 11.4 and Fedora 15 but not
12.1.
6-for purposes of this comment not taking any further time to formulate, I used
only 3 systems, i865G for intel (gx27b), rv200 for radeon (m7ncd), DVI 8600GT
for nouveau (gx28b). i915G, i845G, i945G, i810, iG31, nv11 & rv380 remain
available to further test if necessary.
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