[Bug 218525] Thunderbolt eGPU bad performance

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218525

--- Comment #2 from Mika Westerberg (mika.westerberg@linux.intel.com) ---
I'm not a graphics expert but I wonder if you have tried to run some benchmark
that works the same on both Windows and Linux? I understand that most of the
games you play in Linux are using some sort of "emulation" and that might have
some affect here (which is then issue that you need to take with the folks who
develop that part if it turns out to be the problem).

I did some testing back then with Unigine Heaven: 

https://benchmark.unigine.com/heaven 

Can you perhaps run that (or anything similar) and see what's the difference
between the two OSSes on that same hardware?

Then we would need to understand the hardware configuration, can you add the
full dmesg and output of 'sudo lspci -vv' when you have the eGPU plugged in?

The third thing that comes to mind is that do you have any PCIe ASPM states
enabled? That can be seen in the dmesg too I think and also in the lspci dump.

Also do you have the monitor connected directly to the eGPU outputs or the
host?

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