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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [i7-4600U i915]: constant screen flickering after KMS which correlates with CPU load"
href="https://bugs.freedesktop.org/show_bug.cgi?id=78162#c17">Comment # 17</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [i7-4600U i915]: constant screen flickering after KMS which correlates with CPU load"
href="https://bugs.freedesktop.org/show_bug.cgi?id=78162">bug 78162</a>
from <span class="vcard"><a class="email" href="mailto:konush@cern.ch" title="Maxim Konyushikhin <konush@cern.ch>"> <span class="fn">Maxim Konyushikhin</span></a>
</span></b>
<pre>The following temporary workaround prevents screen flickering:
--- intel_dp.c.orig 2014-05-06 16:36:52.969995358 +0200
+++ intel_dp.c 2014-05-06 16:45:11.209995061 +0200
@@ -749,7 +749,7 @@
}
for (; bpp >= 6*3; bpp -= 2*3) {
- mode_rate = intel_dp_link_required(adjusted_mode->clock, bpp);
+ mode_rate = intel_dp_link_required(adjusted_mode->clock, bpp +6);
for (clock = 0; clock <= max_clock; clock++) {
for (lane_count = 1; lane_count <= max_lane_count; lane_count <<=
1) {
but now I get the following messages when running an OpenGL application:
[drm:intel_pipe_config_compare] *ERROR* mismatch in
adjusted_mode.flags(DRM_MODE_FLAG_PHSYNC) (expected 0, found 1)
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3663 at drivers/gpu/drm/i915/intel_display.c:8853
check_crtc_state+0x65f/0xb50()
pipe state doesn't match!</pre>
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