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Subjecti915 GPU-hang regression in v5.6-rcx
In v5.6-rcx I sporadically see a hanging GPU.

[ 640.919302] i915 0000:00:02.0: Resetting chip for stopped heartbeat on rcs0
[ 641.021808] i915 0000:00:02.0: Xorg[722] context reset due to GPU hang

[ 2229.764709] i915 0000:00:02.0: Resetting chip for stopped heartbeat on rcs0
[ 2229.867534] i915 0000:00:02.0: kwin_x11[1005] context reset due to GPU hang

To recover Xorg must be killed and restarted or reboot is required.
I've never seen this before v5.6-rcx.

Best way to reproduce seem to be "heavily scrolling with the mouse wheel"
in graphic applications. I also saw this once while video streaming in
a browser.


System: Host: fichte Kernel: 5.6.0-rc1 x86_64 bits: 64 Console: tty 3
Distro: Ubuntu 18.04.3 LTS
Machine: Device: Notebook System: FUJITSU product: LIFEBOOK A544
serial: <filter>
Mobo: FUJITSU model: FJNBB35 serial: <filter>
BIOS: FUJITSU // Phoenix v: Version 1.17 rv 1.17 date: 05/09/2014
CPU: Dual core Intel Core i5-4200M (-MT-MCP-) cache: 3072 KB
clock speeds: max: 3100 MHz 1: 1127 MHz 2: 964 MHz 3: 1034
MHz 4: 984 MHz
Graphics:Card: Intel 4th Gen Core Processor Integrated Graphics Controller
Display Server: X.Org 1.19.6 drivers: modesetting (unloaded:
fbdev,vesa) Resolution: 1366x768@60.00hz
OpenGL: renderer: Mesa DRI Intel Haswell Mobile version: 4.5
Mesa 19.2.8


Thanks, Jörg

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