| Bug ID | 96239 |
|---|---|
| Summary | Random "texture flickering" in Shadow of Mordor |
| Product | Mesa |
| Version | git |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | Drivers/Gallium/radeonsi |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | 0xe2.0x9a.0x9b@gmail.com |
| QA Contact | dri-devel@lists.freedesktop.org |
Created attachment 124124 [det=
ails]
Screenshot
See the screenshot attached to this bug.
GPU: R9 390
OpenGL version string: 4.3 (Core Profile) Mesa 11.3.0-devel (git-8314dd7)
$ export MESA_GLSL_VERSION_OVERRIDE=3D430
This may be related to the off-chip tessellation patches, but the issue doe=
sn't
depend on whether tessellation is enabled or disabled.
Created attachment=
124125 [details]
Tomb Raider with tessellation
Tomb Raider without tessellation: OK
Tomb Raider with tessellation: random flickering
| What | Removed | Added |
|---|---|---|
| Summary | Random "texture flickering" in Shadow of Mordor | [radeonsi tessellation] Random "texture flickering"= ; (Shadow of Mordor, Tomb Raider) |
| What | Removed | Added |
|---|---|---|
| Attachment #124124 description | Screenshot | Shadow of Mordor screenshot |
I confirm the bug. It affects tessellation on heaven benchmark= 4.0. r9 390.
| What | Removed | Added |
|---|---|---|
| Summary | [radeonsi tessellation] Random "texture flickering"= ; (Shadow of Mordor, Tomb Raider) | [radeonsi tessellation] Random "texture flickering"= ; (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0) |
This affect me too, in a R9 290, radeonsi driver, using padoka= PPA with Kubuntu 16.04. When you disable tesselation in those games the problem goes away.
Created attachment 12415= 1 [details] [review] ci-64-tess-blocks.patch Does the attached patch help? If not I would appreciate it if someone could find the first commit that fails (using e.g. bisect). Also, I noticed all reporters use hawaii/grenada pro chips. If anyone with a different chip also has this issue, please let me know.
i can confirm this patches generates 0 issues on TAHITI R9-280= and CAPE VERDE HD7700, so it seems it is specific to hawaii/grenada pro
(In reply to Bas Nieuwenhuizen from comment #4) > Created at= tachment 124151 [details] [review] = [review] > ci-64-tess-blocks.patch >=20 > Does the attached patch help? If not I would appreciate it if someone = could > find the first commit that fails (using e.g. bisect). >=20 > Also, I noticed all reporters use hawaii/grenada pro chips. If anyone = with a > different chip also has this issue, please let me know. Unfortunately, ci-64-tess-blocks.patch is making the issue more severe. The frequency of "black triangles on screen" in Tomb Raider is higher= .
Created attachment 124154 [details]
Tomb Raider ci-64-tess-blocks screenshot
| What | Removed | Added |
|---|---|---|
| Summary | [radeonsi tessellation] Random "texture flickering"= ; (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0) | [radeonsi tessellation] [R9 290/390] Random "texture fl= ickering" (Shadow of Mordor, Tomb Raider, Unigine Heaven 4.0) |
(In reply to Bas Nieuwenhuizen from comment #4) > Does the attached patch help? If not I would app= reciate it if someone could > find the first commit that fails (using e.g. bisect). Checking out for example f91c85b29b8261ab3f44d292ed2130d4f577d976 and start= ing Tomb Raider restarts the X server on my machine.
Created attachment 124155 [details] [review] S_03093C_OFFCHIP_BUFFERING(offchip_blocks) if >=3D CIK This patch fixes the issue on my R9 390. The code is just a guesswork. Maybe it should be (2*offchip_blocks-1) inste= ad?
Passing +1 to S_03093C_OFFCHIP_BUFFERING() explains why changi= ng offchip_blocks from 256 to 64 increases the severity of the issue.
Thanks a lot for finding the cause of the issue. I pushed e9d3246a7a74282fbbf95ed077e3c3b7750c8ddd to git, that patch should= fix the issue.
| What | Removed | Added |
|---|---|---|
| Status | NEW | RESOLVED |
| Resolution | --- | FIXED |