How to enable lower display modes?

boh · #1 14th June 2009, 07:31 PM

I have notebook with 1280x800 default resolution. F11 detected this resolution only. I need lower modes like 1024x768 or 800x600 to play games. How to add such modes to the GUI tool for resolution selection?

SlowJet · #2 14th June 2009, 08:14 PM

In Gnome Menu - System, Perfs, Display - no Display Menu item then
yum install system-config-display

SJ

You may need to edit the /etc/X11/xorg.conf and complete it for monitor, screen, resolutions sections to make it work (if your monitor is not recognized by Fedora. i.e. generic vs. specifics)

Robert2 · #3 14th June 2009, 09:14 PM

This is a known problem with Intel graphics on F11 with KMS.

Basically it only gives you one mode unless you either
1) disable KMS by booting with nomodeset
2) add them manually with xrandr

https://bugzilla.redhat.com/show_bug.cgi?id=496813

SlowJet · #4 14th June 2009, 09:47 PM

Quote:

Originally Posted by Robert2

This is a known problem with Intel graphics on F11 with KMS.

Basically it only gives you one mode unless you either
1) disable KMS by booting with nomodeset
2) add them manually with xrandr

https://bugzilla.redhat.com/show_bug.cgi?id=496813

My intel graphic 865bgf works fine, I have multiple modes (without a xorg.conf), I don't use nomodeset and I have never used xrandr.
Maybe the bug was fixed or only applies to certain chips sets?

SJ

Robert2 · #5 15th June 2009, 08:54 AM

Interesting. So it might be that the issue is either limited to certain Intel chips or certain Laptops EDID data.

The latest driver xorg-x11-drv-intel-2.7.0-7.fc11 still has the issue here with 945GM graphics on a ThinkPad T60.

SlowJet · #6 15th June 2009, 12:07 PM

Quote:

Originally Posted by Robert2

Interesting. So it might be that the issue is either limited to certain Intel chips or certain Laptops EDID data.

The latest driver xorg-x11-drv-intel-2.7.0-7.fc11 still has the issue here with 945GM graphics on a ThinkPad T60.

Now that I see the intel 945 .. I think they made a 915 to cover like 845, 855, 865 .. 915 all in one?
So that's why mine works.

SJ

ygordev · #7 18th June 2009, 05:53 AM

Lower resolutions don't work here: Intel 965 Chipset.
I can't use S-Video or VGA out because of this.
I'm gonna test the nomodeset boot.

cnateb · #8 18th June 2009, 07:23 AM

I had a similar problem with F10 and am now having it with 11. It was resolved by installing system-display-config, but when I try to install the package it says says the package isn't found. Maybe I'm remembering the package incorrectly. Any help would be appreciated.

JEO · #9 18th June 2009, 08:39 AM

The package name is system-config-display.

This package allows you to go to System, Administration, Display, and set a default resolution. Also it creates an /etc/X11/xorg.conf file for you.

My reason for reading this thread is that I noticed few display resolution settings available on the F11 radeon driver and no S-video out also. Adding the 'nomodeset' kernel parameter fixed these two issues for me.

ygordev · #10 18th June 2009, 06:26 PM

Problem solved here:
Added these kernel parameters:
nomodeset and vga=791.
Now I have nice S-Video out with correct resolution, graphical boot and shutdown and FPS in glxgears increased from ~400 to ~900.
Thanks for the nomodeset tip!

I have lower resolutions enabled too.

Robert2 · #11 18th June 2009, 06:41 PM

no svideo with KMS is a known issue with the ATI driver
https://bugzilla.redhat.com/show_bug.cgi?id=497055

Regarding the lack of extra modes. This issue is for the most part resolved by upgrading to the latest ati driver (already in F11). If you still miss some modes add them with something like the following that I use with an Intel chipset which has only one mode

#!/bin/bash
#
# modelines created with "gtf 640 480 60"
#
xrandr --newmode "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
xrandr --newmode "1024x768_60.00" 64.11 1024 1080 1184 1344 768 769 772 795 -HSync +Vsync
xrandr --newmode "800x600_60.00" 38.22 800 832 912 1024 600 601 604 622 -HSync +Vsync
xrandr --newmode "640x480_60.00" 23.86 640 656 720 800 480 481 484 497 -HSync +Vsync
xrandr --addmode LVDS1 "1280x1024_60.00"
xrandr --addmode LVDS1 "1024x768_60.00"
xrandr --addmode LVDS1 "800x600_60.00"
xrandr --addmode LVDS1 "640x480_60.00"

ygordev · #12 18th June 2009, 07:24 PM

Quote:

Originally Posted by Robert2

no svideo with KMS is a known issue with the ATI driver
https://bugzilla.redhat.com/show_bug.cgi?id=497055

Regarding the lack of extra modes. This issue is for the most part resolved by upgrading to the latest ati driver (already in F11). If you still miss some modes add them with something like the following that I use with an Intel chipset which has only one mode

(...)

Well, now it's a known issue with Intel drivers too..