On Mon, 20 Feb 2017, Miloslav HÅla wrote:
Dne 17.02.2017 v 11:47 Thomas Gleixner napsal(a):
What's really confusing is this information from the bug report:
" When I changed:
- from Energy Efficient
- to Custom
Energy Performance BIAS Setting:
- from Balanced Performance
- to Performance
problem disappeared. systemd-udevd starts normally, module can be
normally rmmod/insmod'ed now, load is 0.07."
Miloslav: Is there any chance you can try a 4.10-rc8 kernel on that
I compiled 4.10-rc8 kernel with a stock '/boot/config-4.9.0-0.bpo.1-amd64'
config from Debian Jessie backports. Then I reverted BIOS settings to previous
state and rebooted the server. Kernel and all modules loaded normally,
rmmod/insmod intel_rapl_perf passed normally.
Then, without any BIOS change, I rebooted with stock 4.9.0-0.bpo.1-amd64 and
suprisingly, everything works, I cannot reproduce it.
My knowledge on the field of BIOS are shallow. I don't know what I can do to
reproduce the bug now.
Did you just reboot or go through a cold start? That might make a difference.