Bug 103495

Summary: WebGL artifacts running doarama on Ironlake
Product: Mesa Reporter: Clemens Eisserer <linuxhippy>
Component: Drivers/DRI/i965Assignee: Intel 3D Bugs Mailing List <intel-3d-bugs>
Status: RESOLVED FIXED QA Contact: Intel 3D Bugs Mailing List <intel-3d-bugs>
Severity: normal    
Priority: medium    
Version: 17.2   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments: screenshot scene
not properly blended text of loading screen

Description Clemens Eisserer 2017-10-28 07:33:30 UTC 
Created attachment 135139 [details]
screenshot scene

When running the WebGL content Doarama in Firefox https://doarama.com/view/853747 I get various artifacts with firefox:

1. Not properly blended text at the loading screen (alpha=0 results in black)
2. Various artifacts in the animated scene

This happens with Ironlake - all other driver/hw combinations I tested worked well (Radeon, R600, intel-gen7).
Comment 1 Clemens Eisserer 2017-10-28 07:34:13 UTC 
Created attachment 135140 [details]
not properly blended text of loading screen
Comment 2 Clemens Eisserer 2017-10-28 07:37:35 UTC 
Forgot to mention, this happens with Mesa-17.2.2
Comment 3 Kenneth Graunke 2018-10-11 17:02:53 UTC 
I don't have an Ironlake handy to test this, but those kinds of artifacts may have been fixed or at least partially fixed by:

commit 08a5c395abdafd0d7556060596f78c238b4a989f
Author: Kenneth Graunke <kenneth@whitecape.org>
Date:   Thu Aug 2 15:02:18 2018 -0700

    intel: Fix SIMD16 unaligned payload GRF reads on Gen4-5.

which shipped in Mesa 18.1.6 and Mesa 18.2.0.  Can you try a newer Mesa?
Comment 4 Clemens Eisserer 2018-11-21 16:43:42 UTC 
Awesome, it works perfectly fine on Ironlake Mobile with Mesa 18.2.4 :)

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