Bug 452755

Created attachment 310181 [details]
xorg.conf file that uses radeonhd driver

Thanks for the bug report.  We have reviewed the information you have provided
above, and there is some additional information we require that will be helpful
in our diagnosis of this issue.

Please attach your X server log file (/var/log/Xorg.*.log) to the bug report as
individual uncompressed file attachment using the bugzilla file attachment link
below.

Could you please also try to run without any /etc/X11/xorg.conf whatsoever and
let X11 autodetect your display and video card? Attach to this bug
/var/log/Xorg.0.log from this attempt as well, please.

We will review this issue again once you've had a chance to attach this information.

Thanks in advance.

Thanks for the report.

The last stable radeonhd version which appears to work for just about anyone
with a supported card is xorg-x11-drv-radeonhd-1.2.1-1.1.20080429git.fc9 which
is in the F9 updates.

All later xorg-x11-drv-radeonhd snapshots have had regressions, and I fear you
have run into one again.

If you want a quick workaround, I'd suggest you either
  * revert to xorg-x11-drv-radeonhd-1.2.1-1.1.20080429git.fc9
    (if you need fast user switching)
  * switch to xorg-x11-drv-ati's "radeon" driver
    (if you do not need fast user switching)

Of course, we appreciate your help in testing xorg-x11-drv-radeonhd. I will take
this up with upstream when we have the /var/log/Xorg.*.log file here, preferably
when Xorg has been started with '-logverbose 7'.

Created attachment 310293 [details]
log file when using radeon driver and computer locks up

I did some more testing of the computer locking up when using the radeonhd
driver.  First, however, I updated the radeonhd driver to the 20080429 release.

What I found is that when using either the radeonhd or radeon drivers, there is
a problem.  The first time that I start the X server, it runs OK.  However, the
second time that I start the X server, the screen becomes corrupted and the
computer locks up.  This problem does not occur with the vesa driver.

The first time that I start the X server, first I see a grey background and a
mouse pointer that looks like an X.  Then, the mouse pointer changes to an arrow
and the GNOME desktop appears.

The second time that I start the X server,  the GNOME desktop background appears
right away.  The grey background doesn't come up first.  When using the radeon
or radeonhd drivers, the screen becomes corrupted and computer locks up.  When
using the vesa driver, the GNOME desktop comes up and works properly.

When using the radeon driver and starting the X server for the second time, I
log file was generated.  I have already uploaded that log file as an attachment.

When using the radeonhd driver and starting the X server for the second time, no
log file was generated.

To be specific, my testing procedure was:

1) boot to runlevel 3
3) run the command "startx -- -logverbose 7"" as non-root
3) delete the log file
4) run the command "startx -- -logverbose 7" again as non-root
5) turn off computer with the power button
6) reboot to runlevel 3
7) look for new log file

I just tested running Xorg with no configuration file.  I found that Xorg
behaved similarly to when there was a minimal configuration file and the driver
was specified as radeonhd or radeon.

One thing that I noticed is that, again, no log file remained after the computer
locked up and was power cycled.  It seems as though the presence (or absence) of
the log file on reboot may not be related to the driver (radeon or radeonhd).

OK, so we have a problem with both the radeonhd and the radeon driver.

Would you mind attaching the Xorg.N.log files from both test runs with radeonhd
as well?

BTW, if you 'startx -- :2 -logverbose 7' it should end up in Xorg.2.log, which
is not overwritten by Xorg.0.log later.

Created attachment 310347 [details]
Xorg log file from PC with Radeon HD 2400 XT hardware using radeonhd driver.  This was the first run and there was no crash.

As previously mentioned, the first run is OK but the second run hangs the
computer.  I am able to get a log file from the first (which is this
attachment) but not the second run.

Created attachment 310348 [details]
Xorg log file from PC with Radeon HD 2400 XT hardware using radeon driver.  This was the first run and there was no crash.

As previously mentioned, the first run is OK but the second run hangs the
computer.  I am able to get a log file from the first run (which is this
attachment) but not the second run.

Since I am unable to generate a log file from a hung computer, I believe that
the log file that I attached yesterday was from a first run (not a second run).

I have consulted with radeonhd's Luc Verhaegen. He says

   "[I]t's consistent between radeonhd and radeon, first X
    server run, libpciaccess provides correct data, second
    X server run, libpciaccess provides us with wrong data"

and

   "[I]t's a general issue with at least the xserver
    [or drm/kernel]".

Given that the default driver for the card in Fedora is radeon from
xorg-x11-drv-ati, I am assigning this bug over to -ati and hope the more
knowledgeable people over there can figure out where the actual issue is.

I am guessing here, but this might fix it:

   http://koji.fedoraproject.org/koji/buildinfo?buildID=56358

Could you try that, please?

I installed xorg-x11-drv-radeonhd-1.2.1-3.4.20080716git.fc9.x86_64.rpm and tried
to use the radeonhd driver.  The lock up problem persisted for the second time
that X is run.

The latest kernel (the first 2.6.26 release) fixes this problem.