Further information, it turns out that pm-suspend is no longer used, and
systemd-sleep is the new system. The scripts section of pm-suspend is
still there, but it is broken as per
https://launchpad.net/ubuntu/+source/pm-utils/+bug/1455097 (why does
everything I look into seem to be broken????).
To fix the problem, I created the script (make it executable)
/lib/systemd/system-sleep/broadcom_wl_suspend
with the contents
[code]
#! /bin/sh
#mp035: unload buggy broadcom sta driver during suspend.
case $1 in
pre)
modprobe -r wl
;;
post)
modprobe wl
;;
esac
[/code]
This has fixed the problem. I'm not sure where to push this from here,
either the 1) the broadcom package should add ths script, or 2) or the
broadcom sta driver needs fixing. Perhaps (1) immediately while we are
waiting for broadcom to fix (2)?
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https://bugs.launchpad.net/bugs/1495043
Title:
Suspend/Resume Regression 3.19.0-28-generic Dell xps15
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