Lenovo ThinkPad T14 (AMD) Gen 1

Secure boot

As of January 2021 deleting Secure Boot keys and installing your own keys (for example by using KeyTool) will brick the device. This is a problem that is similar to one which has been reported on some other Lenovo laptops and is likely due to a faulty firmware. If the device is stuck in a boot loop after replacing the Secure Boot keys, the only way to repair it is by replacing the mainboard of the device. Hopefully, the issue will get fixed with a firmware update in the future.

Battery issues

In an ongoing Lenovo forums thread, there has been a discussion regarding battery drain issues in suspend/powered-off states. Presumably, laptops with AMD Renoir CPUs and relevant hardware are affected. As of now, BIOS firmware version 1.29 is suggested for use, as version 1.30 introduced significant battery drain; the battery loses up to 50% in 2-3 days while the laptop is in suspend mode.

There is also a suggestion that kernel updates could fix this behavior and that Lenovo and Canonical are working on it.

Keyboard

As of BIOS 1.35, keyboard event processing does not work correctly and can cause input problems with shortcuts involving the function key. Moreover, typing fast can lead to scrambled or missing keys which is caused by polling issues with the firmware.

Trackpad

As of BIOS 1.35, disabling the trackpad has no effect in Linux. In the graphical BIOS and in Windows, this function works as intended.

Since kernel 5.18, there are some issue with the track pad after resume (left button not working anymore). A workaround is to set parameter synaptics_intertouch=0 to the module psmouse.

In a Lenovo forums thread, there has been a discussion regarding touchpad issue with Synaptics firmware PR3584089. Downgrading the version to PR2909640 solves this.

Time stamp counter

As of BIOS 1.35, the time stamp counter (TSC) can be unusable on a cold boot, as indicated by the following log output:

$ dmesg | grep -i tsc

[    0.000000] tsc: Fast TSC calibration using PIT
[    0.000000] tsc: Detected 1696.748 MHz processor
[    0.160394] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x18752743c99, max_idle_ns: 440795215663 ns
[    0.367627] clocksource: Switched to clocksource tsc-early
[    1.393773] tsc: Refined TSC clocksource calibration: 1699.720 MHz
[    1.393785] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x18801ecedab, max_idle_ns: 440795234673 ns
[    1.394099] clocksource: Switched to clocksource tsc
[    2.167096] clocksource: timekeeping watchdog on CPU3: Marking clocksource 'tsc' as unstable because the skew is too large:
[    2.167106] clocksource:                       'tsc' cs_nsec: 506681426 cs_now: 78dfa3a69 cs_last: 75aa51b22 mask: ffffffffffffffff
[    2.167109] clocksource:                       'tsc' is current clocksource.
[    2.167119] tsc: Marking TSC unstable due to clocksource watchdog
[    2.167132] TSC found unstable after boot, most likely due to broken BIOS. Use 'tsc=unstable'.
[    2.167653] clocksource: Checking clocksource tsc synchronization from CPU 13 to CPUs 0,2,8-9,11-12,14-15.

Renesas USB controller

As of BIOS 1.35, toggling the state of USB devices in the BIOS can cause the Renesas controller to fail. This will prevent the webcam from being initialized.

Docking stations

As of BIOS 1.35, video output is unrealiable on both USB3 and mechanical docking stations.

Webcam

Image quality can be improved by updating the webcam firmware. Unfortunately, webcam firmware updates are not shipped via LVFS. Some cameras firmwares can be possibly updated in Linux following steps.