First: I've upgraded from 9.10 to 10.04 beta. My system updates are current.
I have a radeon rs690m (x1200)
This is the problem I ran into:
* Small, horizontal white lines that appear a bit like static. Not very
noticeable, and not present currently.
* Medium and large horizontal lines / areas of corruption.
* Stripes are often screen-wide
* Stripes can be scrolled, e.g., in Firefox or Nautilus.
* Refresh of graphical object clears up corruption -- E.g., a mouseover of
a link or highlighting an icon
* Mouse Pointer gets corrupted at some points, until refreshed (e.g., when
the cursor changes from pointer to question mark, or to a hand, or from hand to
arrow, etc.).
* Corruption occurs regardless of whether or not Desktop Effects are
enabled (important later)
* Corruption might only occur after desktop effects *have* been enabled
during this run.
* Some fonts become corrupted. If they do, the letters corrupted stay
corrupt. I.e., if "k" gets corrupted, and I type "k" elsewhere in the same
font, that too will be corrupted.
It would be really nice to fix this before the release of Lucid -- I
can't imagine what would happen with all the rs690 users out there. Not
that there are a lot, but, there are enough.
Workaround (sort of):
In /etc/modprobe.d/radeon-kms.conf, I set:
options radeon modeset=0
Why just "sort of"?
* Logging into the (only) account created when the system was 9.10 fails, at
best booting me back to the login screen.
* Logging into an account created since the system has been upgraded to 10.04
works fine, desktop effects and all, no graphics glitches.
* Logging into the 9.10-made account with desktop effects disabled works fine.
* Enabling desktop effects once logged in makes the system visually unusable
-- cannot switch to console, graphical screen black except for mouse, but the
system is still running. I can ctrl-alt-delete from a 'text' console, although
there is no text -- it just shows what was last in the graphics buffer (a black
screen with the mouse pointer present).
Note that although there were glitches graphically, desktop effects or
not, the system worked with desktop effects enabled when kms was
enabled.
I think there are probably two problems here:
1) KMS causing or making visible some kind of horrible memory badness that I
don't understand
2) Desktop Effects config in 9.10 can be set to a state that doesn't play
nicely in 10.04 with KMS disabled.
Any further information I will be happy to provide. I have a workable
system, I can just transfer everything over to a new account on my
system, but I want to make sure others aren't affected problematically
-- and it would be nice just to use my old account.
-Brian
Note: Included screenshots are *screenshots*, not photos. The actual
images in memory are corrupt.
--
Graphics corruption with ati x1200 (rs690m)
https://bugs.launchpad.net/bugs/556782
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