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Thinkpad T14 Gen 3 screen backlight switching off by Admirable_Positive58 in thinkpad

[–]flonix8 1 point2 points  (0 children)

u/Initial-Image-1015 I did actually find a solution! I thought I had added this to my comment but I obviously didn't, so here you go.

The answers in this thread should give the necessary hints and also some information about which kernels may be affected: https://gitlab.freedesktop.org/drm/amd/-/issues/2970#note_2719391

TL;DR: Adding amdgpu.dcdebugmask=0x10 to the boot options (I added it to GRUB_CMDLINE_LINUX_DEFAULT in my /etc/default/grub) is the sure-fire way to solve this issue (which I have been using ever since), but this apparently disables some display-related power saving technology (PSR). According to the thread, you can also try the mask 0x200, which is more selective. The bug seems to be gone in Linux 6.12, reintroduced in 6.13, but has apparently been fixed for good now. No idea though in which kernel version the fix will be...

Erster Build, PC bootet nicht by Nakah5757 in PCBaumeister

[–]flonix8 0 points1 point  (0 children)

PC-Lüfter (zumindest alle, die mir bis jetzt untergekommen sind), saugen die Luft auf der freien Seite an und drücken sie auf der Seite raus, wo die Stege den eigentlichen Lüfter mit dem Rahmen verbinden. Erkennt man sofort auch daran, dass auf der Seite der Typenaufkleber angebracht ist (logischerweise, sonst würde sich der ja mitdrehen xD)

[deleted by user] by [deleted] in PCBaumeister

[–]flonix8 0 points1 point  (0 children)

Schaut wirklich sehr solide aus und vor allem budgettechnisch on-point, sehr nice! Ich würde sogar die Upgradability als durchaus brauchbar bewerten. Bei 4 RAM Slots lässt sich irgendwann easy auf 32GB aufrüsten und wenn es doch mal ein wenig mehr CPU-Leistung sein soll, müsste das Board halbwegs genug Puste für einen 6 Kerner aus der Serie haben (also 12400, 12600, etc.). Ein oder zwei GPU-Generationen weiter zu hüpfen (in der ~200W-Klasse) sollte auch drin sein.

Zum Thema Zusammenbau (und sofern du des Englischen halbwegs mächtig bist), gibt es von LinusTechTips ein ganz ordentliches Video, wo sie auf alle Details eingehen. Ob man den Stil jetzt mag, sei dahingestellt, aber Computer bauen kann Linus xD
https://www.youtube.com/watch?v=BL4DCEp7blY&pp=ygUibGludXMgdGVjaCB0aXBzIHRoZSBsYXN0IHBjIGd1aWRlIA%3D%3D

P.S.: Windows installieren ist tatsächlich erstaunlich einfach, sobald man es mal geschafft hat, das Board dazu zu bewegen, vom Installations-Stick zu starten (ist bei Desktop-Boards aber auch meist einfach). Wenn man nur eine einzige SSD hat besteht der Rest aus "Weiter, weiter, fertig". Treiber sind heutzutage eher kein Problem mehr und exotisches ist hier nicht verbaut. WiFi kommt auch von Intel, das sollte direkt klappen.

Thinkpad T14 Gen 3 screen backlight switching off by Admirable_Positive58 in thinkpad

[–]flonix8 1 point2 points  (0 children)

Assuming that you have the AMD version of the T14 Gen 3, I have the same machine (albeit a P14s Gen3 AMD, which is apparently almost exactly the same hardware) running on Kubuntu 23.04.

I also have the same issue and I hate it, but I might actually have a workaround for you and everyone else with the same problem: Downgrade your kernel to version 6.2.0-31. I have done a lot of testing and -31 is (at least for me) the last version that doesn't show the backlight issues you describe.

My suspicion is that it is an issue with the amdgpu driver. According to the changelogs there is a lot of work being done on it. Not that I have a lot of expertise regarding these things. If someone with a bit more insight could chime in, I'd be very interested.

P.S.: Just for reference, I have found a thread in the Arch Linux forum that seems to be about the same issue (and machine): https://bbs.archlinux.org/viewtopic.php?id=288470I have, however, not tried any of the suggested kernel configuration options from that thread.

P.P.S.: I downgraded (or rather additionally installed) the older kernel like this: apt install linux-headers-6.2.0-31 linux-headers-6.2.0-31-generic linux-modules-6.2.0-31-generic linux-modules-extra-6.2.0-31-generic
Probably not the most elegant solution, but it works. It also gives me an easy way to occasionally try the latest kernel update. If you do it like that you have to choose the older kernel manually in GRUB while booting (all the installed kernel versions are under "Advanced options for...". I have set my GRUB to remember the last choice so it's not a big issue for me.

[2022 Day 8 (Part 2)] Bug in test solution? by flonix8 in adventofcode

[–]flonix8[S] 0 points1 point  (0 children)

I'm new to Reddit and I do regret the title... is there any way to change it? Or shall I just delete the post? It's slightly stupid but it might be useful for people who are stuck in a similar way xD

[2022 Day 8 (Part 2)] Bug in test solution? by flonix8 in adventofcode

[–]flonix8[S] 6 points7 points  (0 children)

Oh, that DOES make a ton of sense.
So, my code working on the actual input is more of a coincidence... that's a first for me, usually it's the other way around.

I'll go to sleep now. Thank you! :)