Not getting full monitor resolution

English Multimedia
1

Got a system that I’ve been using for a long time now without any problems. Now suddenly it won’t use a higher resolution than 1024x768.

Found these in /var/log/messages

May 27 07:20:31 linux-6kbj kernel:  1566.737619] [drm:drm_edid_is_valid] *ERROR* EDID checksum is invalid, remainder is 54
May 27 07:20:31 linux-6kbj kernel:  1566.737621] [drm:drm_edid_is_valid] *ERROR* Raw EDID:
May 27 21:54:51 linux-6kbj kernel:   139.449064] radeon 0000:03:00.0: VGA-1: EDID invalid.

Xorg.0.log lists available modes up to 1024x768 and no higher. Monitor should do 1600 x …something and was working fine till just lately. I never added any mods to the configuration and have not added any software other than recommended updates it quite a while.

Any ideas what happened or how to fix it? I checked and the monitor/graphics card will still do upper resolutions with windoze so I’m guessing the hardware is alright.

Using OpenSuse 11.3, 64bit, on a dual core athalon with a Sapphire ATI x1600 graphics card and a 22 inch flat screen that is supposed to go 1600 x 1050. Any suggestions appreciated.

Thanks
Greyangel

2

You could upload your Xorg.0.log contents to SUSE Paste (or similar), then post the link to it here. Looks like it doesn’t like the checksum; maybe it tolerated this previously.

It might be possible to coax the radeon driver to ignore any problematic EDID if necessary, by creating a minimal xorg.conf file. (I can try to guide you through this if necessary).

Now, one thought I had: Did you possibly change cable connection recently, or have a KVM between the display and your computer perhaps? If not, maybe a recent update caused this (updated radeon driver).

3

I’ve made no changes to the cable or anything else for that matter. There was an automatic update notification the other night and I went through the usual routine. The more I think about it the more I think that’s what went wrong. I’ve done nothing else. I’d rather not start doing “workarounds” when something is so obviously broken. Is there a standard method for rolling back the updates? An update history log? I notice now that VO (Game) won’t run full screen anymore either so a change in the graphic driver would probably cause that.

Thanks

4

Another note: Looking at my var/log/warn file, it appears the EDID message has been logging since I installed the system, so that would not appear to be part of the new behavior. Been looking for a log to list what changed. Anybody know where the updates get logged?

5

if you wish to see a chronological list of installed rpms, simply type:


rpm -qa --last

and if that scrolls by your screen too fast:


rpm -qa --last | less
6

Can you remember what update you installed before the issue occured. Sometimes some updates can cause some issues.

7

Further to what captain1988 noted, if you wish to pursue that line of investigation, you can obtain a chronological list of your updated rpms by typing:


rpm -qa --last

and if that scrolls by too fast, then re-direct the output to a text file, and examine the text file in a text editor … ie


rpm -qa --last > myrpms.txt

and open up the new file ‘myrpms.txt’ with a text editor and look to see what rpms were installed immediately prior to the problem occurring.