[Bug 107784] [AMD tahiti XT] displayport broken

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Comment # 21 on bug 107784 from
(In reply to Sylvain BERTRAND from comment #20)
> Roughly, if you have a cpu with a frequency above 4.2GHz (max unsigned
> 32bits),
> linux time subsystem gets broken leading to the timeouts in displayport
> programming. Ofc, my cpu runs at 4.7GHz.

I hit the bug on AMD FX-9590 machine with RX 580 and 2 displayport monitors. As
for you bisect wasn't successful for me and led me to network merge commit. 

Looks like you're right! If I downclock the CPU to 4.2 GHz then current
mainline master (f8f65382c98a28e3c2b20) boots fine.


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