<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [drm/i915] Displayport connected screen reports Signal Error after update to 5.1 kernel" href="https://bugs.freedesktop.org/show_bug.cgi?id=110782#c14">Comment # 14</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [drm/i915] Displayport connected screen reports Signal Error after update to 5.1 kernel" href="https://bugs.freedesktop.org/show_bug.cgi?id=110782">bug 110782</a> from <a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> Ville Syrjala</a> <pre>This is another case where something totally crazy is going on with the M/N values: [ 6.179040] [drm:intel_dump_pipe_config [i915]] dp m_n: lanes: 4; gmch_m: 1703936, gmch_n: 8388608, link_m: 283989, link_n: 1048576, tu: 14 [ 6.179501] [drm:intel_dump_pipe_config [i915]] adjusted mode: [ 6.179549] [drm:drm_mode_debug_printmodeline [drm]] Modeline "": 60 154000 1920 1968 2000 2080 1200 1203 1209 1235 0x0 0x9 [ 6.179654] [drm:intel_dump_pipe_config [i915]] crtc timings: 154000 1920 1968 2000 2080 1200 1203 1209 1235, type: 0x0 flags: 0x9 [ 6.179755] [drm:intel_dump_pipe_config [i915]] port clock: 540000, pipe src size: 1920x1200, pixel rate 154000 Based on all those other parameters the m/n values should be like they are in the good log: dmesg_good_lts_4.19.46-1.txt:[ 7.986521] [drm:intel_dump_pipe_config [i915]] dp m_n: lanes: 4; gmch_m: 1794230, gmch_n: 8388608, link_m: 299038, link_n: 1048576, tu: 14 but the values used in the bad log are the values for the previous 1680x1050 modeset. So far I can't see any way that could happen unless we somehow skipped the encoder .compute_config() entirely.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>