Incorrect Refresh Rate For Mitsubishi Diamond Pro 2045u

Bug #20006 reported by Alex
8
Affects Status Importance Assigned to Milestone
xorg (Ubuntu)
Medium
Daniel Stone

Bug Description

Ubuntu Linux 5.10 Colony 3 detects the correct resolution for my monitor, but
oddly only allows for a 60 Hz refresh rate on any given resolution. My monitor
however is capable of doing 1600x1200 @ 85 Hz with no problem.

Furhtermore, Vida Linux 1.2 has my monitor in the install and shows the right
frequency ranges and works well.

Revision history for this message
Daniel Stone (daniels) wrote :

you're on amd64, right?

Revision history for this message
Alex (exigentsky) wrote :

NO, I have an Athlon XP 2400. (yeah, I know it sucks :( )

Here's everything for the Mitsubishi Diamond Pro 2045u (NSH1157):

Horizontal sync: 30.0-121.0 kHz
Vertical sync: 50.0-160.0 Hz

It's also easily capable of high resolutions, though I usually don't go higher
than 1600x1200.

Revision history for this message
Matt Zimmerman (mdz) wrote :

Please attach /var/log/Xorg.0.log and /etc/X11/xorg.conf from up-do-date Breezy.
 If you aren't continuing to track Breezy on this machine, you can try the
Preview live CD:

http://releases.ubuntu.com/5.10/

Revision history for this message
Alex (exigentsky) wrote :

OK, now I'm running Colony 5 and this problem persists. I have the resolution I want and everything is fine except that I am stuck at 60 Hz
which is basically unusable for real work (extended time) because it makes my eyes hurt.

I can't figure out why I cannot change the resolution; 60 Hz is the only option. I would be happy to provide more information though so
perhaps it can work like in SUSE 10, Linspire and Windows.

I will attach the file you requested in a minute.

Revision history for this message
Matt Zimmerman (mdz) wrote :

We are still waiting for the files requested on 2005-09-21 before this bug can
be analyzed

Revision history for this message
Alex (exigentsky) wrote :

Created an attachment (id=4265)
My xorg.conf file

The Xorg file shows that my monitor is not detected properly as a Mitsubishi
Diamond Pro 2045u and is instead labeled "Generic Monitor".

Revision history for this message
Alex (exigentsky) wrote :

Created an attachment (id=4266)
Xorg.0.log

Xorg.0.log from up to date Colony 5.

Revision history for this message
Alex (exigentsky) wrote :

I actually looked at the xorg.conf file myself a little more and fixed my
problem. All I did was replace the horizontal sync with 30.0-121.0 and the
vertical sync with 50.0-160.0 and upon restart Ubuntu automatically selected 85
Hz as default. All is well now, on my desktop.

Though I wouldn't expect most people new to Linux to know their
horizontal/vertical sync ranges and then modify their xorg.conf file in the
right place to fix the system.

Revision history for this message
Daniel Stone (daniels) wrote :

the problem is that the monitor itself is reporting the wrong ranges

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