[Xorg-driver-geode] [Bug 433142] Re: geode driver do not display 1024x600 on (K)UNR Karmic

[Cui, Hunk]

Hi, Rigo,
	Got your explanation. So I think the cvt and gtf can generate
similar effect.
	In Xorg.0.log file, you can find one message about "Printing
probed modes for output default", list some Modeline, I think it need
modify the driver file (cim_modes.c).
	I hope it can help you. :)

Thanks,
Hunk Cui

-----Original Message-----
From: bounces at canonical.com [mailto:bounces at canonical.com] On Behalf Of
Rigoberto Torres
Sent: Saturday, July 10, 2010 7:41 AM
To: Cui, Hunk
Subject: [Bug 433142] Re: geode driver do not display 1024x600 on (K)UNR
Karmic

Hi Frank,
The cvt is a linux utility for calculating VESA Coordinated Video Timing
modes, given the desired horizontal, vertical resolutions and refresh
rate. Gtf is a similar unix utility that basically does the same thing.
I have seen other display timing generating utilities including one
developed by one of our engineers called "lx_gtf.exe", which is
distributed with our LX product on our AMD embedded developers website.
All these display timing generating utilities seem to give a slightly
different horizontal timing, vertical timing or refresh rate, but they
are all with in range and for the most part work well. By looking at
display panel timing specs you can see that panels a range of tolerable
timings, as long as you stay within the specified range the display
works good. If you go ousstide their specified range you can see side
effects including artifacts on the display screen, the screen shifted to
the right to the left, up or down, or part of the display off the
screen.
So, cvt and gtf are similar utilities that generate display timings.

Rigo

-- 
geode driver do not display 1024x600 on (K)UNR Karmic
https://bugs.launchpad.net/bugs/433142
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Status in "xserver-xorg-video-geode" package in Ubuntu: Confirmed

Bug description:
Geode driver do not display 1024x600 resolution in (K)UNR Karmic.
Actually, the bug also affects Jaunty, but doesnt affect Intrepid.

I used to use a custom xorg.conf in intrepid, but it doesnt work on
Jaunty or Karmic. In Jaunty and karmic, I could only use 1024x768 whick
makes the screen bigger than the real display and is impossible to open
new programs, specially in the menus (they simply disapear in the bottom
of the screen).

Further investigations on other distros made me think this is a
regression from the xserver-xorg-video-geode 2.10.1-2. This bug affects
all drivers from 2.10.1 (which is in Intrepid). In fact, Debian Lenny
(that uses geode 2.10.1-2) works perfectly, VectorLinux 6.0 lite (that
uses geode 2.9 - i think), also works. Jaunty (geode 2.11.1-1) and
Karmic (2.11.4.1-1) dont work, they only display 1024x768...

Actually, when I use the automatic configuration in Jaunty and Karmic
(with no xorg.conf), the screen really seems to be 1024x768, but when I
use the custom xorg.conf (the same I use in Intrepid), the screen seems
different... like it was 800x768 (I know it's wierd, but it doesnt seem
to be 1024x768 at all - everything is really ugly).

Hope it will work in Karmic in time.
Thanks in advance.

[lspci]
00:01.1 VGA compatible controller [0300]: Advanced Micro Devices [AMD]
Geode LX Video [1022:2081]
    	Subsystem: Advanced Micro Devices [AMD] Geode LX Video
[1022:2081]


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