<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [regression, bisected] [i915] setting initial watermarks on gen 7 IVYBRIDGE causes blank lines on monitor" href="https://bugs.freedesktop.org/show_bug.cgi?id=109477#c10">Comment # 10</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [regression, bisected] [i915] setting initial watermarks on gen 7 IVYBRIDGE causes blank lines on monitor" href="https://bugs.freedesktop.org/show_bug.cgi?id=109477">bug 109477</a> from <a class="email" href="mailto:andreatclist@gmail.com" title="Andrea <andreatclist@gmail.com>"> Andrea</a> <pre>(In reply to Andrea from <a href="show_bug.cgi?id=109477#c9">comment #9</a>) > (In reply to Ville Syrjala from <a href="show_bug.cgi?id=109477#c8">comment #8</a>) > > (In reply to Andrea from <a href="show_bug.cgi?id=109477#c7">comment #7</a>) > > > (In reply to Ville Syrjala from <a href="show_bug.cgi?id=109477#c6">comment #6</a>) > > > > All the numbers look very much correct :/ ... > > > > And finally LP1: > > > > # echo '12 0 0 0' > /sys/kernel/debug/dri/0/i915_pri_wm_latency > > > > # echo '12 0 0 0' > /sys/kernel/debug/dri/0/i915_cur_wm_latency > > > > $ xset dpms force off ; xset dpms force on > > > > Still corrupted? > > > > > > No, the corruption is gone. Switching windows, desktops, focus etc seems to > > > work fine. And it doesn't re-appear after > 10 mins. > > > > Hmm. That machine seems very broken when even LP1 doesn't work. > > Umm, I guess there might be a misunderstanding: after setting LP1 with the > values you suggested, the corruption is gone and everything seems to be OK > as before the regression. > > Anyway, I'll also try the BIOS update and post the results (thanks for the > pointer, I'll check). JFTR, I've updated to "DMI: LENOVO 20AA0016GE/20AA0016GE, BIOS GHET41WW (1.26 ) 11/21/2018", same results: - the monitor starts corrupted - setting echo '12 0 0 0' > /sys/kernel/debug/dri/0/i915_pri_wm_latency ... "fixes" the issue.</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>