[Bug 70254] [snb dp hotplug] Pipe B, PCH transcoder B FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70254

--- Comment #17 from Robert N <crshman at gmail.com> ---
Replies inline:

> Does the problem occur with just one of the displays plugged in?
I've never had this happen with only a single display.

> Or with two displays and lower resolution on both. 1920x1080 at 60 should be OK.
With both monitors 1920x1080 at 60 it doesn't happen

> Can you take some register dumps (for the original dual 2560x1440 case)? I'd
> like to check it things look OK. As root run this:
> 
> intel_reg_read 0xc6014 0xc6040 0xc6044 0xc6018 0xc6048 0xc604c 0x45100
> 0x45104 
> 0x45108 0x4510c 0x45110 0x45120 0x145d10 0x42000 0x42004 0x42020 0x70180
> 0x71180
> 
> intel_reg_read is part of intel-gpu-tools.
Do I run the intel_reg_read right after the problem has occurred, or when?
(Never used that tool)

Thanks for looking into this guys, I'll do my best to get you all and any
information you need to debug this!

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