[Bug 81647] i915 flickering or blury screen, linux-3.16.0-rc5, linux kernel bisect trakced f2c234571d3329204bea7b917cba7004d753c0fc commit

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81647

Adam Jirasek <libm3l at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=75378

--- Comment #2 from Adam Jirasek <libm3l at gmail.com> ---
I found the problem on my computer Toshipa S70 
with VGA compatible controller: Intel Corporation 4th Gen Core Processor
Integrated Graphics Controller (rev 06) was caused by commit
c6930992948adf0f8fc1f6ff1da51c5002a2cf95

file drivers/gpu/drm/i915/intel_dp.c

sequence around loop 

for (clock = min_clock; clock <= max_clock; clock++) {
for (lane_count = min_lane_count; lane_count <= max_lane_count; lane_count <<=
1) {

Reversing this commit solved the problem, I recompiled the 
the drim-intel-nightly (8734408c113bb38234ed03ec51c723b3deff579b)
and it works fine. 

The error is reproducible, ie. by swithcing the sequence of the loops I can
reproduce the blury screen or flicker

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