[TURKS] GPU lockup and then hard lockup on shadertoy

System information

OS: Ubuntu 20.10
GPU: Radeon HD 6650M
Kernel version: Linux 5.8.13
Mesa version: 20.2.2
Desktop manager and compositor: Mutter 3.38.1

Describe the issue

Due to bug #3805 I tried to open this page https://www.shadertoy.com/view/4tByz3 on Radeon HD 6650M instead of 6620G, just to see if system will behave differently. It is behave differently indeed, as I was getting complete hard lockup instead of just GPU lockup.

Regression

No.

Log files as attachment

lagybug_turks.log

Any extra information would be greatly appreciated

Related issue: #3805

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information