Anyone here an HP dev? Need help contacting ProBook BIOS devs due to some severe linux bugs

[antintin]

Have a probook x360 435 g7 with a 4700u, and CPPC for the new amd-pstate is just not supported by the firmware, and the touchpad randomly stops working

For the touchpad issue I filed these kernel bug reports (both inactive):

https://bugzilla.kernel.org/show_bug.cgi?id=215253
https://bugzilla.kernel.org/show_bug.cgi?id=215345

 

[Brickwizard]

Welcome

the new amd-pstate is just not supported by the firmware

amd-pstate CPU Performance Scaling Driver — The Linux Kernel documentation

touchpad randomly stops working

9. Elantech Touchpad Driver — The Linux Kernel documentation

 

[auyer]

Hi
I own a similar model (x360 435 G7), and I believe it uses the same bios family (s80 bios).
I found this release notes that states that it supports amd CPPC. This should mean they should support the amd_pstate driver.

https://ftp.hp.com/pub/softpaq/sp112501-113000/sp112515.html

However, I cant find how to enable it, and the cpu is not exposing cppc functionalities.

➜   ls /sys/devices/system/cpu/cpu0 | grep cppc
... empty

 

[osprey]

Hi
I own a similar model (x360 435 G7), and I believe it uses the same bios family (s80 bios).
I found this release notes that states that it supports amd CPPC. This should mean they should support the amd_pstate driver.

https://ftp.hp.com/pub/softpaq/sp112501-113000/sp112515.html

However, I cant find how to enable it, and the cpu is not exposing cppc functionalities.

➜   ls /sys/devices/system/cpu/cpu0 | grep cppc
... empty

Evidently CPPC is enabled in the BIOS/UEFI. Maybe useful info here:

https://www.reddit.com/r/linux/comments/15p4bfs