<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - LCD flickering on Thinkpad T440p (Haswell) with kernel 4.6-rc4 (PSR enabled)" href="https://bugs.freedesktop.org/show_bug.cgi?id=95176#c1">Comment # 1</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - LCD flickering on Thinkpad T440p (Haswell) with kernel 4.6-rc4 (PSR enabled)" href="https://bugs.freedesktop.org/show_bug.cgi?id=95176">bug 95176</a> from <a class="email" href="mailto:calvin.walton@kepstin.ca" title="Calvin Walton <calvin.walton@kepstin.ca>"> Calvin Walton</a> <pre>Created <a href="attachment.cgi?id=123311" name="attach_123311" title="kernel-drm-debug-log">attachment 123311</a> <a href="attachment.cgi?id=123311&action=edit" title="kernel-drm-debug-log">[details]</a> kernel-drm-debug-log Here's a log with drm.debug=0xe During this log, i set drm.debug to 0xe, then set i915.enable_psr to -1 (was 0). I then use the screen locker in GNOME to blank the screen; this causes the display to turn off, and when I turn the display back on psr is enabled (I checked i915_edp_psr_status before and after to verify this). The display then blinks several times, while the log prints repeated lines like [20345.092329] sasami kernel: [drm:drm_mode_addfb2] [FB:59] [20345.203191] sasami kernel: [drm:drm_mode_addfb2] [FB:61] >From watching the log live, I believe the blinks occurred between the line that said '59' and the line that said '61', but it's hard to tell due to possible buffering in systemd-journald. Afterwards, I reset i915.enable_psr to 0 and set drm.debug back to 0. If you want a complete log from boot with drm.debug enabled, let me know.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>