[Bug 107420] [hsw] GPU HANG: ecode 7:0:0x86dffffd in Xorg

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107420

--- Comment #8 from Georg <gchomse at chomse.de> ---
In the meantime I did this:
- Update of the boards firmware (BIOS)
Concentrating on Ubuntu:
- Install 16.04, upgrading to 18.04
- Install kernel (linux-kernel-amdgpu-binaries-master) from 4.15 to 4.18.0-rc8
including firmware-radeon-ucode_2.10_all

Perhaps it is interesting that things seem to be a little better: I always
reach the login in gdm3 or lightdm after the kernel and firmware upgrade. This
was not the case before. There I ended up in a screen without user name and
scaling was wrong. 

"dpkg-query -l | grep mesa" shows mesa version 18.0.5.

Beside this I played with boot parameters: "intel_iommu=igfx_off",
"i915.enable_rc6=0".

I can't believe that I'm the only one in the world with this problem. I use an
Intel board (DZ87KLT-75K) with no additional boards in it. And I'm not even
able to boot the installation of Ubuntu 18.04. This reproduces 100%.

Btw: just for testing I added an external graphic board. In this configuration
it works without any problem. If I switch back to the internal graphic unit
problems are back.

Any further hint more than apprechiated.

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