<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#c17">Comment # 17</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>(In reply to Blubberbub from <a href="show_bug.cgi?id=110782#c16">comment #16</a>) > Created <a href="attachment.cgi?id=144499" name="attach_144499" title="bad dmesg drm.debug=0xe log_buf_len=4M on drm-tip f384132bcdd867 with "[PATCH] mst m/n debugs"">attachment 144499</a> <a href="attachment.cgi?id=144499&action=edit" title="bad dmesg drm.debug=0xe log_buf_len=4M on drm-tip f384132bcdd867 with "[PATCH] mst m/n debugs"">[details]</a> > bad dmesg drm.debug=0xe log_buf_len=4M on drm-tip f384132bcdd867 with > "[PATCH] mst m/n debugs" > > I patched the <a href="attachment.cgi?id=144494" name="attach_144494" title="[PATCH] mst m/n debugs">attachment 144494</a> <a href="attachment.cgi?id=144494&action=edit" title="[PATCH] mst m/n debugs">[details]</a> <a href='page.cgi?id=splinter.html&bug=110782&attachment=144494'>[review]</a> [review] on top of the bad drm-tip > f384132bcdd8670478b99a2a71753e1595305dce (resulting in > 6c16031c189b5fcb9eaf0ee5ac6a9e72a8d0cda7) and created a dmesg log with > "drm.debug=0xe log_buf_len=4M". > > Do you also need the dmesg for a good kernel that is patched with that patch? No, I don't think that would provide us anything we don't already know. In this case we get: [ 6.158894] [drm:intel_dp_mst_compute_config [i915]] bpp 24, lanes 4, dotclock 154000, port clock 540000 [ 6.158951] [drm:intel_dp_mst_compute_config [i915]] gmch m 1794230, gmch n 8388608, link m 299038, link n 1048576 ... [ 6.160712] [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 The m numbers do not match, which should be impossible.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>