** Description changed:
I'm upgrade my system to ubuntu 5.10, after that, xorg can't load the
correct resolution of the monitor ( 1024 x 768 ). I'ts only load
640x480. I've used dpkg-recunfigure xserver-xorg, and insert the correct
values, but don't work. The system is a Samsung 753dfx and a gforce mx
200 32mb.
[Update]
A lot of people have reported this same bug. Symptoms include:
* Your hardware supports a variety of resolutions, but Ubuntu only runs in
640x480, 800x600, and/or 1024x768
* In the "Monitor" section of /etc/X11/xorg.conf, your monitor is listed as
"Generic Monitor", with HorizSync and VertRefresh rates that do not match your
monitor
* `xresprobe <driver>` fails to work, or does not return accurate
information for your hardware. (You can find your driver by looking in
/etc/X11/xorg.conf for the line "Driver ..." It will be something like 'ati',
'nv', 'nvidia', etc. If you are using this on a laptop, run `xresprobe
<driver> laptop`.
The work-around for this bug is to edit /etc/X11/xorg.conf and replace
the rates with ones that match your monitor. The section should look
something like this:
Section "Monitor"
Identifier "Generic Monitor"
VendorName "SNY"
ModelName "SDM-S91"
Option "DPMS"
HorizSync 28-80 # Important: Use horizontal frequency for
your monitor
VertRefresh 48-75 # Important: Use vertical frequency for
your monitor
EndSection
Your monitor's documentation will tell you what the frequencies are.
It's typically on a data sheet in the back of the book titled "Input
Signal" or similar. If you don't have the printed manual, you can
usually also find it on the manufacturer's website.
+ Alternatively, you can try running `sudo dpkg-reconfigure xserver-xorg`
+ and specifying the refresh rates through that interface, if you wish to
+ avoid hand editing config files. Note that this will replace your
+ xorg.conf file entirely.
+
The proper fix for this bug is to identify WHY xresprobe isn't working,
and for this we will need everyone's help. Here are some ideas on why
it may or may not work, that need testing:
* Does it work with DVI monitors?
* Does it work with KVM switches?
* Does it work with DVI-to-VGA adapters?
* Does it work with HD monitors?
* Does it work with multi-headed systems?
* Does it work on non-x86 systems (AMD64, PPC64, et al)?
If you are having resolution problems, you can help by running xresprobe
(see above) and if it fails, then try to think of anything a-typical
about your system, and report your findings in the comments of this bug.
--
Xorg resolution falling back to 640x480 and/or 800x600 when h/v freqs incorrect
https://bugs.launchpad.net/bugs/3731
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