Good morning Lluís,

Flickering happening in the browser, assuming because you said Github pages, might be due to Hardware Acceleration being activated in the browser, you could try and disable it and see if those flickers go away, each browser might have the option to disable it in different places 

As for the first issue, it could be, indeed, the AMDGPU driver, I suggest trying another kernel if you're in 6.14 (eg, 6.17)
6.17 can be installed with the `linux-oem-24.04d` package 

If these do not fix the issue, it might be worth to contact our Support Team for them to help you with this issue

Waiting for your reply,
Regards,

I will test if the hardware acceleration fix the issue with the browser.

I have kernel (uname -r) 6.17.0-1009-oem already. Not sure if moving to 6.18 directly from source would help much or how compatible it would be with the programs I already have installed.

If I have problems with this again I'll contact the Support Team. Many thanks for the quick reply

The flickering on the built-in screen has happened on other programs not just web browsers (disabling Hardware Acceleration resulted in a bad performances on multiple websites).

I'll be moving the /home directory to a new partition on the same disk and try a new OS system. 

Installing another OS probably won't help - we don't have the same chassis, but we have the same CPU (Ryzen AI 9 365), same GPU (Radeon 880M), and likely the same broken ACPI firmware. The PSR bug exists at the kernel driver level and affects all distributions equally.

A workaround is adding amdgpu.dcdebugmask=0x10 (or 0x610 like Slimbook support told me) to disable Panel Self Refresh. For Ubuntu/Slimbook OS: edit /etc/default/grub, add it to GRUB_CMDLINE_LINUX, then run sudo update-grub and reboot.

If you run dmesg on your system, does it also show an error message like this?

Jan 11 22:03:39 archlinux kernel: ACPI BIOS Error (bug): Could not resolve symbol [^^PCI0.GP17.VGA.AFN4], AE_NOT_FOUND (20250807/psargs-332)
Jan 11 22:03:39 archlinux kernel: ACPI Error: Aborting method \_SB.ADP1._PSR due to previous error (AE_NOT_FOUND) (20250807/psparse-529)

Many thanks @maeschba for chiming in. 

I got several ACPI errors, none are exactly the same ( I didn't find any SB.ADP1._PSR): 

```

2026-02-02T22:50:17,741078+01:00 ACPI BIOS Error (bug): Could not resolve symbol [\_SB.ACDC.RTAC], AE_NOT_FOUND (20250404/psargs-332)

2026-02-02T22:50:17,741114+01:00 ACPI Error: Aborting method \_SB.PEP._DSM due to previous error (AE_NOT_FOUND) (20250404/psparse-529)
2026-02-02T22:50:17,741594+01:00 ACPI: EC: interrupt unblocked
2026-02-02T22:50:17,902621+01:00 [drm] PCIE GART of 512M enabled (table at 0x000000801FB00000).
2026-02-02T22:50:17,902727+01:00 amdgpu 0000:66:00.0: amdgpu: SMU is resuming...

```

I will check if this is the way forward, I see some other people using that and other strategies for related bugs, like using mesa or:

> This (or a similar) issue occurred on my TUXEDO Sirius 16 (Gen 2) laptop and, rather than downgrading the kernel, my solution was to enter the BIOS settings and change the Smart Mux Support from Hybrid Graphics Mode to SAG 1.5 (under Advanced > OEM Advance function > AMD PBS).

But I might still pursue splitting the system from the home directory as it might help in other projects

Good morning, Lluis

With the current trend, several applications are just Chromium inside (eg Electron), so the flickering issues could also happen as much as a normal browser, and hardware acceleration within Electron apps are enabled at compile time, so unsure if its possible to disable in those without building from source for all of the applications that use Electron.

Regards,

Lluis,

The TUXEDO laptop probably suffers from similar problems. Tongfang (or Clevo) needs to fix their ACPI tables and EC firmware. These systems do not seem to be tested for Linux, but for Windows only.

Regards, Michael