After upgrading to 4.4.0-45 from 4.4.0-21 the issue seems to have gone
away.
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https://bugs.launchpad.net/bugs/1518457
Title:
kswapd0 100% CPU usage
Status in Linux:
Unkn
I haven't noticed any issues in my day-to-day work with RC6. Can't say
all issues are completely resolved since I haven't done any exhaustive
testing but it's a major improvement over RC5.
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Downgrading to 3.19.0-28 seems to fix the issues for me but that kernel
has no support for my WiFi card so I'm stuck with using a kernel with a
wonky graphics driver.
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The error messages have gone away with 4.5-RC1 but the issues remain
(i.e. display flicker, display won't turn on again after computer has
gone to sleep.
I've currently only got this error message in my DMESG:
[ 21.277697] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR*
CPU pipe B FIFO
Happening here as well with 4.4.0 RC7
$ uname -r v
4.4.0-040400rc7-generic #201512272230 SMP Mon Dec 28 03:32:16 UTC 2015
$ dmesg | egrep '(intel|i915)'
[0.149154] pci :00:14.0: reg 0x10: [mem 0xe122-0xe122 64bit]
[0.649005] [] intel_uncore_init+0xe2/0x2e1
[0.649435] aud
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