kms howto - is there one?

Felix Miata mrmazda at earthlink.net
Thu Mar 18 08:46:18 UTC 2010


On 2010/03/17 19:45 (GMT-0700) Adam Williamson composed:

> On Wed, 2010-03-17 at 18:48 -0400, Felix Miata wrote:

>> This is what happens in F13:
>> # xrandr --output VGA1 --mode 1600x1200
>> xrandr: cannot find mode 1600x1200
>> # xrandr --addmode UXGA 1600x1200
>> xrandr: cannot find output "UXGA"
>> # xrandr --addmode VGA1 1600x1200
>> xrandr: cannot find mode "1600x1200"

> Well, of course. If the driver doesn't believe your monitor / card
> combination is capable of that mode, xrandr won't be able to set it.
> That's normal. You need to set up xorg.conf so that the mode is
> available.

Actually there's apparently not much "set up" I can do with F13 ATM. It's
obvious F13's Intel driver is the biggest problem here, maybe generally,
maybe the 845G gfxchip.....

> What monitor *is* this, anyway?

3 different Trinitron CRTs. All old. All work fine @ 2048x1536 with any
Kubuntu, SUSE or Mandriva I throw at them, radeon, intel or mga. They also
work fine @ 2048x1536 using F13 with mga. I don't have F13 on radeon or Intel
(other than 845G) to try.

>> On Factory, Cooker and Lucid, I can accomplish what I want. This is from
>> working Lucid on the same box just a few days ago (but it's using 2.6.32):
>> http://fm.no-ip.com/tmp/Linux/Buntu/ has xorg.conf and data files, with
>> xorg.conf.02-1600x1200x120x16bpp-buntu910-intel being the xorg.conf that
>> works fine in Lucid but not when used in F13.

> They are likely using older X server, kernel and intel driver, so

Those are also devel distros targeted for release relatively close to the
same time as F13, so "older" one wouldn't expect to be by very much. Kubuntu
Lucid seems stuck on 2.6.32 kernel, but Factory & Cooker are using 2.6.33.
OTOH, all but F13 are on X 1.7.5, while F13 is showing 1.8.0rc1.

> they're not very comparable. Ubuntu's results seem nuts - it claims
> 2048x1536 as a 'probed' mode. Very few monitors are capable of that.

I have 7 under this roof that can do 2048x1536, only one of which had a
non-zero acquisition cost, and one real oldie that only can do up to
1920x1440 (NEC P1150). The NEC is the only one I can get F13 to do better
than 1024x768 on using i845G. I only tried 1600x1200 on it, but got 1920x1440
on it from SUSE 10.2.

The Xorg.0.logs and xorg.confs for the 4 displays and bunches of F13s, SUSEs,
Kubuntus & Cookers are in http://fm.no-ip.com/tmp/Linux/Xorg/ . 31 files
created in past 50 or so hours. Some of the logs from the newest X versions
do not include customary probed mode info, so I've included several older to
prove modes above 1024x768 up through 2048x1536 can get found via probing.
I've appended xrandr output to several too.
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409

Felix Miata  ***  http://fm.no-ip.com/


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