[Bug 107543] Video cutout on Kaby Lake U processors.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107543

--- Comment #28 from Mahesh Kumar <mahesh1.kumar at intel.com> ---
Hi,

If issue is observed in specific processor, then I have few more questions.
What is the memory configuration used in KBL & SKL boards.

There were few known WA to solve potential fifo underrun issues,
Patches got merged for same recently.
Can you please make sure that following series is present, and tryout if issue
is still reproducible.
https://patchwork.freedesktop.org/series/46481/

one of the major different between SKL and KBL is IPC, I would also like to
check if issue is reproducible after disabling IPC. which can be done by
writing 

#echo 0 > /sys/kernel/debug/dri/0/i915_ipc_status

In parallel I'll try to check if there is any known KBL specific WA missing.

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