Public bug reported: eventstat showing two unity8 threads on an idle desktop:
Event/s PID Task Init Function Callback 62.00 12359 QSGRenderThread do_nanosleep hrtimer_wakeup 62.00 11858 unity8 schedule_hrtimeout_range_ hrtimer_wakeup Although it's not calling swap buffers or rendering anything (confirmed by MIR_CLIENT_PERF_REPORT=log). Just waking up at around the same frequency as the screen (although 62Hz is more like every 16.0ms, unlike the screen's 16.68ms/59.95Hz) ** Affects: canonical-devices-system-image Importance: Undecided Status: New ** Affects: ubuntu-power-consumption Importance: Undecided Status: New ** Affects: qtmir (Ubuntu) Importance: Undecided Status: New ** Affects: unity8 (Ubuntu) Importance: Medium Status: New ** Tags: performance power-management regression unity8-desktop ** Also affects: qtmir (Ubuntu) Importance: Undecided Status: New ** Also affects: canonical-devices-system-image Importance: Undecided Status: New ** Description changed: eventstat showing two unity8 threads on an idle desktop: - Event/s PID Task Init Function Callback - 62.00 12359 QSGRenderThread do_nanosleep hrtimer_wakeup - 62.00 11858 unity8 schedule_hrtimeout_range_ hrtimer_wakeup + Event/s PID Task Init Function Callback + 62.00 12359 QSGRenderThread do_nanosleep hrtimer_wakeup + 62.00 11858 unity8 schedule_hrtimeout_range_ hrtimer_wakeup + + Although it's not calling swap buffers or rendering anything (confirmed + by MIR_CLIENT_PERF_REPORT=log). Just waking up at around the same + frequency as the screen. ** Also affects: ubuntu-power-consumption Importance: Undecided Status: New ** Description changed: eventstat showing two unity8 threads on an idle desktop: Event/s PID Task Init Function Callback 62.00 12359 QSGRenderThread do_nanosleep hrtimer_wakeup 62.00 11858 unity8 schedule_hrtimeout_range_ hrtimer_wakeup Although it's not calling swap buffers or rendering anything (confirmed by MIR_CLIENT_PERF_REPORT=log). Just waking up at around the same - frequency as the screen. + frequency as the screen (although 62Hz is more like every 16ms, unlike + the screen's 16.68ms/59.95Hz) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1664828 Title: Unity8 wakes up continuously at around 62Hz on an idle desktop To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1664828/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs