[Bug 64323] New: Severe misrendering in Left 4 Dead 2 - bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ

From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: [Bug 64323] New: Severe misrendering in Left 4 Dead 2
Date: Tue, 07 May 2013 15:52:49 +0000	[thread overview]
Message-ID: <bug-64323-8800@http.bugs.freedesktop.org/> (raw)

[-- Attachment #1.1: Type: text/plain, Size: 1714 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=64323

          Priority: medium
            Bug ID: 64323
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
           Summary: Severe misrendering in Left 4 Dead 2
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: bryancain3+fdo-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
          Hardware: x86 (IA32)
            Status: NEW
           Version: git
         Component: Drivers/DRI/nouveau
           Product: Mesa

This should be filed under component "Drivers/Gallium/nouveau", but that
doesn't exist for some reason.

In the nv50 driver, after loading a map in the Left 4 Dead 2 beta,  there are
major rendering artifacts that make the game unplayable.  Portal shows a
similar problem.

Noticing that stable versions before Mesa 9.1 don't have this problem, I
bisected the regression to this commit:

http://cgit.freedesktop.org/mesa/mesa/commit/?h=48a45ec24ae74c0

commit 48a45ec24ae74c00d1487552e94d9f824a428f58
Author: Christoph Bumiller <e0425955-oe7qfRrRQffzPE21tAIdciO7C/xPubJB@public.gmane.org>
Date:   Tue Jan 8 16:13:11 2013 +0100

    nouveau: improve buffer transfers

    Save double memcpy on uploads to VRAM in most cases.
    Properly handle FLUSH_EXPLICIT.
    Reallocate on DISCARD_WHOLE_RESOURCE to avoid sync.

I don't understand the changes made by this commit well enough to fix the
regression myself.  I have an apitrace that can be used to reproduce the issue,
and will comment on this bug with a link to it as soon as I find a good way to
share large (~512 MB) files online.

-- 
You are receiving this mail because:
You are the assignee for the bug.

[-- Attachment #1.2: Type: text/html, Size: 3072 bytes --]

[-- Attachment #2: Type: text/plain, Size: 181 bytes --]

_______________________________________________
Nouveau mailing list
Nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
http://lists.freedesktop.org/mailman/listinfo/nouveau