863186 - WebGL crashes Windows nightly with Optimus, NV GPU, and Layers accel

Status: RESOLVED WONTFIX

(Core :: Graphics: CanvasWebGL, defect, P3)

Description

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Using a 20130417 nightly, any WebGL context creation causes an instant crash with no crash reporter.

Lenovo W520, Optimus, with firefox told to use the nvidia GPU.  I believe this worked fine pre-layers-refactor, but I'd have to pull that and verify.

Comment 1

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

I lied about no crash reporter: https://crash-stats.mozilla.com/report/index/bp-2e9833d4-7eed-47e3-8fa8-82ab42130418

Comment 2

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Setting prefer-native-gl to true avoids the crash (and with force-enabling webgl in that config, renders fine).

Comment 3

[Kelsey Gilbert [:jgilbert]]

Works with on Win7 on nightly from a few days ago, at least. (But still post-refactor) We do appear to be running M1 and Ru tests on Win8 builds on trunk, but not R (accelerated). Does disabling layers accel eliminate the crash?

Comment 4

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Indeed.  Only seems to happen if I run Firefox with the discrete GPU and with acceleration enabled.  Either disabling acceleration or running with the Intel GPU doesn't cause a crash.

Comment 5

[u279076]

I'm still seeing this get reported on average once per week but it seems to be isolated to two users, both with dual NVIDIA/Intel GPUs, both with NVIDIA driver 9.18.13.1100. I suspect the venn diagram of dual GPU nvidia/intel users testing WebGL is pretty minimal so it's hard to know how critical this is without a larger sample size. 

That said, I'm not sure this bug should be kept open unless it's something we're going to work on sometime soon. My recommendation is to close this as INCOMPLETE and reopen it if/when it becomes a higher priority.

Comment 6

[Sylvestre Ledru [:Sylvestre]]

Closing because no crash reported since 12 weeks.