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#1 2021-09-06 13:04:15

audiores
Member
Registered: 2021-09-06
Posts: 7

Lenovo Thinkpad L14 Gen2 AMD Linux incompatibilities

I wrote a longer post on reddit, which is suming up the issues of a Lenovo L14 Gen2 AMD (more specifically: Gen2A).
https://www.reddit.com/r/AMDLaptops/com … amd_linux/


https://i.ibb.co/tX0g2wC/Screenshot-fro … -55-19.png

Here is an overview of the issues:
1) Sleep not working, machine only booting with acpi=noirq and no wake from standby (also on mainline 5.14)
2) Random Kernel panics and reboots (and linux-hardened does not boot)
3) Webcam not working
4) High CPU Usage IRQ 86

Would love to hear if others got it working


Mod Edit - Replaced oversized image with link.
CoC - Pasting pictures and code

Last edited by Slithery (2021-09-11 12:32:10)

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#2 2021-09-06 13:49:44

audiores
Member
Registered: 2021-09-06
Posts: 7

Re: Lenovo Thinkpad L14 Gen2 AMD Linux incompatibilities

The problems have been already confirmed by another user with the same model on reddit. https://www.reddit.com/r/AMDLaptops/com … &context=3

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#3 2021-09-06 13:56:17

loqs
Member
Registered: 2014-03-06
Posts: 13,968

Re: Lenovo Thinkpad L14 Gen2 AMD Linux incompatibilities

audiores wrote:

2) Random Kernel panics and reboots (and linux-hardened does not boot)

https://bbs.archlinux.org/viewtopic.php?id=269155

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#4 2021-09-11 12:29:42

audiores
Member
Registered: 2021-09-06
Posts: 7

Re: Lenovo Thinkpad L14 Gen2 AMD Linux incompatibilities

Two new relevant things that happened recently:

1) AMD-PSTATE CPUFreq Driver patches have been provided by AMD to the Linux Kernels. https://www.tomshardware.com/news/zen-r … nux-driver

2) AMD has a suspend/resume fix for Linux 5.15 (s2idle / suspend-to-idle S0ix sleep state code). https://www.phoronix.com/scan.php?page= … Linux-5.15

I do hope that these two Kernel developments improve the Linux Zen3 experience for Lenovo users.

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#5 2021-10-12 04:45:03

audiores
Member
Registered: 2021-09-06
Posts: 7

Re: Lenovo Thinkpad L14 Gen2 AMD Linux incompatibilities

For everyone's information: this still is an issue and sleep/resume with ZEN3 notebooks on archlinux does not work. The machines don't wake up from sleep again. Confirmed with Kernel 5.15-rc5

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