Bug 103150

Summary: SecondLife / Advanced Lighting Model / destroys world
Product: xorg Reporter: arne_woerner
Component: Driver/AMDgpuAssignee: xf86-video-ati maintainers <xorg-driver-ati>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
my SecondLife viewer's "About" page...
none
glxinfo's output
none
Xorg.0.log
none
example scene with ALM off
none
example scene with ALM on none

Description arne_woerner 2017-10-08 18:00:29 UTC 
Created attachment 134752 [details]
my SecondLife viewer's "About" page...

Hi!

When I play SecondLife I get a quite good frame rate out of my RX550...
... until I enable "Advanced Lighting Model" (ALM)
(because i hoped 2 c shadows at a decent frame rate with that new GPU (b4 i used the APU's HD7660D and fglrx, which produced about 5fps when ALM was enabled, but they looked good))...

Somehow a lot of things just disappear now until i move the camera really close to them (and then it looks like ALM works fine, but it is a ridiculously small area... about as big as a chest...)...
Sometimes I c the things flickering, when i move the camera back&forth in a distance, that is "too" high, but then they disappear again, when the camera stands still again (in a "too" high distance)...
Furthermore my viewer seems to think, that my RX550 can only handle "low-mid" graphics quality, so that i have to override that manually to "mid-high"...

Videobenchmark.net lists the RX550 as "high end"...
https://www.videocardbenchmark.net/video_lookup.php?gpu=Radeon+RX+550&id=3761
so it should be able to present all the shadows (Firestorm only needs less than 1GiB of GPU memory, if i understand the "Preferences" dialog correctly)...
in fact it should even b able to present them at a good frame rate...
Is it possible to fix that?

Thx.

Bye
Arne
Comment 1 arne_woerner 2017-10-08 18:01:12 UTC 
Created attachment 134753 [details]
glxinfo's output
Comment 2 arne_woerner 2017-10-08 18:01:47 UTC 
Created attachment 134754 [details]
Xorg.0.log
Comment 3 arne_woerner 2017-10-08 18:02:22 UTC 
Created attachment 134755 [details]
example scene with ALM off
Comment 4 arne_woerner 2017-10-08 18:02:40 UTC 
Created attachment 134756 [details]
example scene with ALM on
Comment 5 arne_woerner 2017-10-08 19:55:43 UTC 
in the output of glxinfo:
what does
OpenGL core profile version string: 4.5 (Core Profile) Mesa 17.2.1
OpenGL version string: 3.0 Mesa 17.2.1
mean?

does it mean, that my box does not support OpenGL 4.5?

-arne
Comment 6 Clemens Eisserer 2017-10-09 19:08:21 UTC 
your box supports 4.5 in core profile, and 3.0 in compat profile - this is to be expected, as mesa does not implement compat-profile for > 3.0
Comment 7 arne_woerner 2017-10-11 17:09:06 UTC 
on Phoronix someone said, he/she was able to use that ALM on Mesa without any big render errors...

can it be, that Mesa does not play nicely with the RX550?

-arne
Comment 8 arne_woerner 2017-10-18 10:54:24 UTC 
mesa 17.3 on Mint 18.2 (from some so called PPA) works great on that same RX550... :) so i just have to wait, that it comes to Archlinux/Manjaro... :) *w00t* -arne
Comment 9 Michel Dänzer 2017-10-18 13:42:43 UTC 
Resolving per comment 8, thanks for the update.

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