I have the same problem. My cpu Intel(R) Core(TM) i7-2620M CPU @
2.70GHz. When on battery max_freq is locked down to min_freq, which is
800MHz. I'm using a fully updated Ubuntu 13.04. The problem was not
there right after a fresh installation and appeared after some upgrade
during the previous days
I have an HP notebook. For me the problem arises precisely when on
battery. When on AC the system scales correctly, both with battery in or
off its location; just pull off the AC charger and the max frequency
locks down to 800MHz per preocessor, which actually is the minimum
possible. So the issue
Today I've just noticed that on my laptop the issue is gone: I removed
'processor.ignore_ppc=1' from the default grub command line and the
hardware limits are set up correctly in the range 800 MHz - 2.70 GHz.
Using latest kernel 3.8.0-26-generic. Anyway for me the problem showed
on battery, so it w
On my affected machine I tested a live iso of EndeavourOS (latest
release) with kernel 5.13+ and I observed no freezes. So the problem
looks specific to Ubuntu on my laptop (Dell Latitude 7390).
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Hello Kleber,
I tried kernels 5.11.0-40 and 5.13.0-21. My machine freezes with both.
Freezes happen randomly, maybe a few seconds after ubuntu boots, maybe
after few minutes. Kernel 5.4.0-90 works.
My version is Ubuntu 20.04.3 LTS. Machine is a Dell Latitude 7390 with
Intel i7-8650U, Intel UHD Gr
I have been affected by the same bug after upgrading ubuntu 20.04 LTS
from kernel 5.8 to 5.11. I have a Dell Latitude 7390. Random freezes
when plugged in initially, but worked on battery. After changing
motherboard, random freezes even on battery... I have downgraded to
kernel 5.4.0-88-generic and
