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  #1  
Old 18th December 2009, 11:10 PM
tuxtard Offline
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linuxfedorafirefox
Dell latitude C600 resolution problem

Hi there. I've recently installed F12 on my old Dell Latitude C600 laptop, and as usual, I am experiancing display resolution problem. On other distros (open suse, ubuntu, arch, mint...) I was able to set native display resolution (1024x768) by entering correct horizsync and vertrefresh values in the monitor section of the xorg.conf, but in F12 that trick does not work. When I looked through Xorg log, I've noticed that it is some kind of r128 module problem. The only way I can get 1024x768 resolution to work in F12 is by setting vesa device module in xorg.conf, but in that case laptop is very slow. Here's my xorg log output:


http://pastebin.com/f7930fe27


Is there a way to fix this problem or to somehow force 1024x768 resolution with r128 module?
Thanks in advance
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  #2  
Old 19th December 2009, 07:14 AM
CSchwangler Offline
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linuxfedorafirefox
Did you try to run without xorg.conf? Another thing you might want to check out is

https://fedoraproject.org/wiki/Commo...phics_adapters

There seem to be some issues with kernel mode setting on certain ATI graphics cards.
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  #3  
Old 19th December 2009, 09:59 AM
tuxtard Offline
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linuxfedorafirefox
Thank you for your reply. I've already tried booting with nomodeset and without xorg.conf and the result is the same. Here is my xorg.conf file:

http://pastebin.com/f31e0da7e

I've also noticed this spamed through the xorg log:

Quote:
(II) R128(0): Not using default mode "1024x768" (bad mode clock/interlace/doublescan)
(II) R128(0): Not using mode "1024x768" (no mode of this name)
(II) R128(0): Modifying mode according to VBIOS: 800x600 [pclk 36.0 MHz] for FP to: 800x600 [pclk 65.0 MHz]
(--) R128(0): Virtual size is 800x600 (pitch 800)
(**) R128(0): *Default mode "800x600": 65.0 MHz (scaled from 40.0 MHz), 37.9 kHz, 60.3 Hz
(II) R128(0): Modeline "800x600"x60.3 65.00 800 824 841 1120 600 602 608 638 +hsync +vsync (37.9 kHz)
but I know that this card supports 1024x768 resolution and that horizsync and vertrefresh values are correct, I used them in other distros. Also when I switch to vesa 1024x768 resolution works.
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  #4  
Old 19th December 2009, 05:39 PM
famewolf Offline
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linuxsusefirefox
Quote:
Originally Posted by tuxtard View Post
Thank you for your reply. I've already tried booting with nomodeset and without xorg.conf and the result is the same. Here is my xorg.conf file:

http://pastebin.com/f31e0da7e

I've also noticed this spamed through the xorg log:



but I know that this card supports 1024x768 resolution and that horizsync and vertrefresh values are correct, I used them in other distros. Also when I switch to vesa 1024x768 resolution works.
Not that it helps but I'm having the exact same issue...I switched to vesa to get the 1024x768 but the video is so slow it can't play any sort of movie which it was able to do before....I may have to step down to the r128's 800x600 so I can still watch a movie on it.


Seem's it's been an issue for a while based on this: https://bugzilla.redhat.com/show_bug.cgi?id=473365

Last edited by famewolf; 19th December 2009 at 06:44 PM.
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  #5  
Old 19th December 2009, 05:44 PM
tuxtard Offline
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linuxfedorafirefox
Ok guys, I've managed to fix the problem. I used an online modeline calculator and generated modeline for 1024x768 resolution:

Quote:
Modeline "1024x768_60.00" 64.11 1024 1080 1184 1344 768 769 772 795 -HSync +Vsync
Here is the complete xorg.conf file for those brave enough to use F12 on Dell Latitude C600 laptop:

http://pastebin.com/f6c1ace56

Also you can add vga=792 at the end of the kernel boot line in grub, and you will have that fancy Fedora logo upon boot and 1024x768 as console resolution
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  #6  
Old 19th December 2009, 07:39 PM
famewolf Offline
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linuxsusefirefox
Talking

Quote:
Originally Posted by tuxtard View Post
Ok guys, I've managed to fix the problem. I used an online modeline calculator and generated modeline for 1024x768 resolution:



Here is the complete xorg.conf file for those brave enough to use F12 on Dell Latitude C600 laptop:

http://pastebin.com/f6c1ace56

Also you can add vga=792 at the end of the kernel boot line in grub, and you will have that fancy Fedora logo upon boot and 1024x768 as console resolution
Thanks so much for posting this. My Latitude C510 (same laptop but with the celeron 700) worked perfectly with your provided xorg.conf and the divx movies played fine in mplayer too. I'm about to take a trip and you made my day as now I can load up some tv eps to watch.
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  #7  
Old 19th December 2009, 09:01 PM
tuxtard Offline
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linuxopera
You are welcome
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  #8  
Old 20th December 2009, 05:11 AM
famewolf Offline
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linuxsusefirefox
Just a quick followup...for anyone using the posted xorg.conf, if you want suspend to ram or suspend to disk to work again, you need to change the line that says 'Load "dri"' to 'Disable "dri"', save and then reboot.
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