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: Power technology: - 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 machine?
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.
King redards, Miloslav