We experienced this on a HP-Probook 6450B with kernel 4.4 running the provided tests:
echo platform > /sys/power/disk [ 533.556002] perf interrupt took too long (2507 > 2500), lowering kernel.perf_event_max_sample_rate to 50000 [ 1830.133850] perf interrupt took too long (5002 > 5000), lowering kernel.perf_event_max_sample_rate to 25000 [ 2537.897989] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun [ 2537.898048] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun [ 3313.942173] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun [ 3313.942273] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun [ 3313.977472] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder B FIFO underrun echo disk > /sys/power/state [18786.704686] sd 0:0:0:0: [sda] Starting disk [18786.708197] ERROR @wl_wowl_ind_wake_reason : Unable to get wake reason, err = -95 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1566302 Title: Ubuntu 16.04: Suspend freezes the system after upgrade to linux image 4.4.0-16 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1566302/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
