<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [BDW] kms_flip / vblank-vs-suspend-interruptible is failing" href="https://bugs.freedesktop.org/show_bug.cgi?id=98289#c9">Comment # 9</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [BDW] kms_flip / vblank-vs-suspend-interruptible is failing" href="https://bugs.freedesktop.org/show_bug.cgi?id=98289">bug 98289</a> from <a class="email" href="mailto:tomeu@tomeuvizoso.net" title="Tomeu Vizoso <tomeu@tomeuvizoso.net>"> Tomeu Vizoso</a> <pre>(In reply to Tomeu Vizoso from <a href="show_bug.cgi?id=98289#c7">comment #7</a>) > Running this test on an APL machine here, I see this in dmesg: > > [10968.960490] [drm:drm_handle_vblank] vblank event on 58648, current 58648 > [10968.960502] [drm:vblank_disable_fn] disabling vblank on crtc 0 > [10971.312512] [drm:edp_panel_vdd_off_sync] Turning eDP port A VDD off > [10971.312529] [drm:edp_panel_vdd_off_sync] PP_STATUS: 0x80000008 > PP_CONTROL: 0x00000067 > [11031.602616] perf: interrupt took too long (3200 > 3178), lowering > kernel.perf_event_max_sample_rate to 62000 > [11121.589837] perf: interrupt took too long (4038 > 4000), lowering > kernel.perf_event_max_sample_rate to 49000 > [11211.908147] PM: Syncing filesystems ... done. > ... > [11212.918426] [drm:drm_handle_vblank] vblank event on 73245, current 73246 > > > So after getting the vblank 58648 and right before suspending there's a big > delay of 244 seconds (11212 − 10968) that is accompanied of complaints by > perf. > > After resuming, we get a vblank of 73245 which roughly matches the previous > vblank count plus 244 * 60. The delay seems to be caused by receiving RTC interrupts at a rate of 8kHz from the moment the alarm is programmed.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>