After successful thaw video screen is unreadable

[Jay Ridgley]

Folks,

I have a Dell Latitude C610 running 10.04 LTS. It has an ATI Radeon video 
device, as shown by lspci.

When I hibernate my system, it completes successfully (per pm-suspend.log).

Then when I restart the system thaw reports Finished (per pm-suspend.log).

There are no errors of any kind!

Yet my video screen looks like an old fashioned movie screen when the film got 
messed up (yeah I been around a while!) and is totally unusable!

I have been searching and have seen that some others have had similar problems 
(not exactly,(Hertz add, remember)). I have been unable to get the fixes applied 
and/or working, however.

One was to add nomodeset as a kernel boot parameter, I tried that by adding a 
line in /boot/grub/menu.lst that read:

nomodeset

That did not seem to make any difference.

There was also a post at: http://ubuntuforums.org/showthread.php?t=1508904

that stated that they were able to get it fixed by:


If I ran "sudo s2ram -n" I saw that I could not suspend when using a framebuffer 
(NOFB). lsmod showed 2 framebuffer drivers - vga16fb and fbcon.
I disabled the first by adding it to /etc/modprobe.d/blacklist-framebuffer.conf
I could then suspend if I booted in recovery mode (no X, and hence no radeon or 
fbcon drivers).
Whenever the radeon driver loaded, it also loaded fbcon. To prevent this I had 
to disable KMS, which I did by:
echo options radeon modeset=0 > /etc/modprobe.d/radeon-kms.conf
After this I can now suspend and resume because fbcon is not loaded when the 
radeon driver loads.

You could check if your machine is listed in /usr/lib/pm-utils/video-quirks, and 
see what the problem may be.

--- end of post

I added vga16fb to /etc/modprobe.d/blacklist-framebuffer.conf, however, upon 
reboot it was still there. I then did a sudo rmmod vga16fb and tried to do a 
hibernate and thaw. The module was NOT present in the list produced by 
hibernate. Still no joy...

I hvae not tried to do:
  echo options radeon modeset=0 > /etc/modprobe.d/radeon-kms.conf
since I do not have a radeon-kms.conf file and I am not sure that would help 
anyway. I did try to do an sudo rmmod fbcon but that reported fbcon was in use.

I am hesitant to continue to try things that are NOT exactly describing my 
problem since I have had no success.

I did check the video-quirks and found C600 listed but NOT C610 the entry reads:
addquirk --quirk-radeon-off

How do I do that? Would it help??? Any other ideas?

Thanks,
Jay
-- 


Jay Ridgley
jridgley2 at austin.rr.com
Registered Linux User ID - 9115
Registered Ubuntu User ID - 23320