[Bug 111726] [WHL] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111726

--- Comment #6 from Jason Le <jason.v.le at intel.com> ---
The flickers issue was first introduced in driver with OS build version 12370
when the code added to support Render Compression in i915 driver.  The code has
been reversed starting OS build 12449 due to multiple issues reported with the
original patch.

Therefore, this should be no longer an issue since 12449 build.  I have
verified both bad (buid 12443) and good (build 12450) OS images.  I verified
with 2 external 4K panels Dell and Samsung.  For FIFO watermark related issues,
panel models should not make a difference as long the same resolution and
refresh rates are consistent.

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