https://bugs.freedesktop.org/show_bug.cgi?id=35095

--- Comment #2 from Chris Rankin rankincj@googlemail.com 2011-03-07 14:19:24 PST --- That tiny pencil-line of corruption in 33648 looks nothing like what I'm seeing.

WoW is looking more like someone has wiped away most of the tiles with a large paint brush. (Think: the width of the entire screen and one third of its height.)

https://bugs.freedesktop.org/show_bug.cgi?id=35095

--- Comment #4 from Chris Rankin rankincj@googlemail.com 2011-03-08 13:15:50 PST --- Created an attachment (id=44249) --> (https://bugs.freedesktop.org/attachment.cgi?id=44249) Screenshot showing HyperZ corruption.

This corruption only seems to happen when playing full-screen, which (unfortunately) means 1920x1200.

https://bugs.freedesktop.org/show_bug.cgi?id=35095

Chris Rankin rankincj@googlemail.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Attachment #44249|Warcraft.jpeg | filename| |

https://bugs.freedesktop.org/show_bug.cgi?id=35095

--- Comment #7 from Chris Rankin rankincj@googlemail.com 2011-03-08 15:13:22 PST --- The git commit that does this to WoW is:

d99ec708afbb785ce05031661222b38c9447059f is the first bad commit commit d99ec708afbb785ce05031661222b38c9447059f Author: Marek Olšák maraeo@gmail.com Date: Mon Feb 28 13:38:01 2011 +0100

r300g: fix HiZ memory size computation and deciding when to use HiZ

I removed the HiZ memory management, because the HiZ RAM is too small and I also did it in hope that HiZ will be enabled more often.

This also sets aligned strides to HIZ_PITCH and ZMASK_PITCH.

:040000 040000 06b80f252cf7a052ef8be4dd098fd90de5d4a4e7 9dea1e6fda15ca3704c9324157a6e43c15140396 M src

https://bugs.freedesktop.org/show_bug.cgi?id=35095

--- Comment #8 from Chris Rankin rankincj@googlemail.com 2011-03-08 15:24:28 PST --- (In reply to comment #6)

Please enable HyperZ and try either of these:

RADEON_DEBUG=nozmask

This makes no difference.

RADEON_DEBUG=nohiz

And this removes the corruption.

https://bugs.freedesktop.org/show_bug.cgi?id=35095

--- Comment #10 from Chris Rankin rankincj@googlemail.com 2011-05-15 05:06:36 PDT --- (In reply to comment #9)

Could you test the latest Mesa master branch? There are some new HiZ fixes.

At best, those HiZ fixes didn't help. But I suspect the corrupt area on the login screen may actually be larger now.

https://bugs.freedesktop.org/show_bug.cgi?id=35095

--- Comment #12 from Chris Rankin rankincj@googlemail.com 2011-06-25 07:18:01 PDT --- (In reply to comment #11)

I've just retested WoW with HiZ enabled on my M66GL and the 2.6.39.1 kernel, and my dmesg log now fills up with these messages:

[drm:r100_cs_track_check] *ERROR* [drm] No buffer for z buffer ! [drm:radeon_cs_ioctl] *ERROR* Invalid command stream !

This is no longer happening with 2.6.39.2 kernel and latest Mesa from git. Original corruption has been restored.

https://bugs.freedesktop.org/show_bug.cgi?id=35095

--- Comment #14 from Chris Rankin rankincj@googlemail.com --- (In reply to comment #13)

Is this still an issue with current Mesa git?

That's tricky: WoW has changed its login screen since I first reported this bug. And I'm going to need to upgrade to libdrm-2.4.40 in order to compile the latest Mesa anyway. (Fedora 17 only has 2.4.39).

https://bugs.freedesktop.org/show_bug.cgi?id=35095

Marek Olšák maraeo@gmail.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Status|REOPENED |RESOLVED Resolution|--- |WORKSFORME

--- Comment #16 from Marek Olšák maraeo@gmail.com --- Ok. I guess you can't try the old login screen anymore, so I'll just close this bug. You can re-opened it if you encounter the same issue.