Red Hat Bugzilla – Bug 445048
All resolutions are two lines too low.
Last modified: 2008-07-25 14:56:07 EDT
Description of problem:
My graphics controller is the X3500 inside Intel's G35 chip on an Asus P5E-V
HDMI motherboard. X uses the driver "intel". The monitor is connected by DVI
through an HDMI-to-DVI adapter. The monitor always reports that the signal is
two pixels smaller vertically than it's supposed to be, regardless of which
resolution I choose in system-config-display. If I set the resolution to
1920×1200 the monitor reports 1920×1198, if I set 1680×1050 I get 1680×1048, and
so on all the way down to 640×480 which becomes 640×478.
Judging by what the Gnome panels look like and how far up and down the mouse
cursor will go, it looks like the logical size of the desktop is what it's
supposed to be, but the uppermost and the lowest line of pixels aren't displayed.
The problem occurs only in graphical mode on the DVI channel. In text mode I get
640×480 pixels, and with an analog connection instead of DVI I get the
resolution I set.
I have attached the monitor to another computer (with a graphics controller from
Nvidia), and got 1920×1200 pixels displayed. I have also attached another
monitor to the G35, and that monitor reported "resolution: new mode", indicating
that it too got some unusual resolution. These tests show that the problem is
with the G35 or the driver for it.
Two missing lines of pixels wouldn't be a big problem in itself, but the odd
resolution of 1920×1198 happens to trigger a bug in my monitor and as a result
the highest resolution I can use is 1600×1200 (which becomes 1600×1198). If I
could get the resolution I specify I'd be able to make use of the full width of
1920 pixels of my monitor.
Version-Release number of selected component (if applicable):
Thanks for the bug report. We have reviewed the information you have provided
above, and there is some additional information we require that will be helpful
in our diagnosis of this issue.
Please attach your X server config file (/etc/X11/xorg.conf) and X server log
file (/var/log/Xorg.*.log) to the bug report as individual uncompressed file
attachments using the bugzilla file attachment link below.
Could you please also try to run without any /etc/X11/xorg.conf whatsoever and
let X11 autodetect your display and video card? Attach to this bug
/var/log/Xorg.0.log from this attempt as well, please.
We will review this issue again once you've had a chance to attach this information.
Thanks in advance.
Created attachment 304463 [details]
configuration after selecting 1600×1200 in system-config-display
Created attachment 304464 [details]
log with the attached xorg.conf
Created attachment 304466 [details]
log with no xorg.conf
Restarting X without an xorg.conf gave me 1920×1198 pixels.
Am I supposed to change the status to something other than NEEDINFO when I've
provided the requested information? I've never found any instructions on how to
interact with developers through Bugzilla, so I don't know if reporters are
allowed to change the status of bugs as they see fit or if that should be left
to the developers. I'm changing the status to ASSIGNED now. I hope that's the
When you post any comment to the bug NEEDINFO is released? Unfortunately there
is a bug in bugzilla, that mere posting an attachment doesn't count.
I see. Apparently posting an attachment and a comment together, like I did in
comment 4, doesn't count either.
(In reply to comment #7)
> I see. Apparently posting an attachment and a comment together, like I did in
> comment 4, doesn't count either.
Yes, unfortunately so -- your comment is considered a description of the
attachment not a separate item. See bug 213941.
This problem is present in Fedora 9 too, with these package versions:
This problem seems to be fixed with the recent X updates.
CURRENTRELEASE looks like the most appropriate resolution.