hi, i'm trying to get 2560x1600 on second monitor (dell 3007WFP-HC).
i can't get over 1280x800.
even when i use the "Supported additional Video Mode" modeline from Xorg.0.log,
it says "mode clock too high", and no modes except 1280x800 show in xrandr.
i am able to work around the "mode clock too high" problem by commenting out a
check in rhd_tmds.c in the git source. for good measure i error and/or ignore
on all the other places that MODE_CLOCK_HIGH might happen, but those parts of
the code don't seem to ever be hit for me. the modification is attached as
git.diff.
the git.diff patch makes both the "additional" video mode i have specified, and
another (apparently default) 2560x1600 mode show up in xrandr. however, when i
switch into these modes the 3007WFP-HC just goes blank. also, even though i
have:
Option "PreferredMode" "2560x1600add"
in my xorg.conf (also attached), the 2nd monitor still starts in 1280x800.
my Xorg.0.log and startx.log are attached from:
- starting xorg via:
~ startx -- -logverbose 7 > startx.log 2>&1
- in xorg, running:
~ xrandr
Screen 0: minimum 320 x 200, current 2680 x 1050, maximum 4000 x 1600
VGA_1 disconnected
PANEL connected 1400x1050+0+0 287mm x 215mm
1400x1050 60.0*+
DVI-D_1 connected 1280x800+1400+0 646mm x 406mm
2560x1600add 59.9 +
2560x1600 59.9
1280x800 59.9*
~ xrandr --output DVI-D_1 --mode 2560x1600add # screen goes blank
~ xrandr --output DVI-D_1 --mode 2560x1600 # screen stays blank
~ xrandr --output DVI-D_1 --mode 1280x800 # low-res screen returns
- killing xorg via ctrl+alt+bksp
i'm working with
- thinkpad T60
- Linux pima 2.6.24 #1 PREEMPT Tue Jan 29 00:34:39 PST 2008 i686 Genuine
Intel(R) CPU T2500 @ 2.00GHz GenuineIntel GNU/Linux
- gentoo
- x11-apps/xrandr-1.2.2
- x11-libs/libXrandr-1.2.1
- the latest commit on my xf86-video-radeonhd git checkout before my
changes is
commit bc8851304a71e612b2dafaacc965858e3f197654
Author: Hans Ulrich Niedermann