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Asbestbrezel

Member

Registered: 2014-07-27

Posts: 67

unreliable detection of Monitor at HDMI-Port

Hello archers,

i've got a pretty annoying problem with my new Computer. When i boot Linux and both my Monitors are connected and switched on (Main-Monitor on DisplayPort and TV on HDMI) it freezes at some point of the boot-process.
If i only switch on the DP-Monitor, it boots up fine. But the next Problem is, sometimes the TV is not detected by xrandr. But it helps to unplug and plug it in again.
I tried several Distros, like for example Manjaro and Fedora. So even with Wayland on Fedora-Gnome, it has the same Problem. But hardware seems to be ok. On Windows 10, no problem.

Hardware: ASUS B560-I Motherboard and intel i5-11400, using only the iGPU
Kernel-Version 5.15.12

2 Errors appear on Bootup and in dmesg-output:

 snd_hda_codec_hdmi hdaudioC0D2: Monitor plugged-in, Failed to power up codec ret=[-13]

 i915 0000:00:02.0: [drm] *ERROR* Failed to get ACT after 3000ms, last status: 01

Any help is appreciated.

Last edited by Asbestbrezel (2022-01-01 17:38:30)

seth

Member

Registered: 2012-09-03

Posts: 61,647

Re: unreliable detection of Monitor at HDMI-Port

Possibly https://bbs.archlinux.org/viewtopic.php?id=269278 - though nobody there reported those errors
Maybe also https://bbs.archlinux.org/viewtopic.php?id=271858

Disable FBC and PSR and because of the 1st error you could also just try to blacklist snd_hda_codec_hdmi (but won't be able to play audio over that output/TV)

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Asbestbrezel

Member

Registered: 2014-07-27

Posts: 67

Re: unreliable detection of Monitor at HDMI-Port

thanks for the help. but sadly it didnt work.

things i tried  so far:

- Disabling audio codec by adding "snd_hda_codec_hdmi.enable_silent_stream=0" to kernel parameter

Error messages disappear, but bootup still freezes / second monitor gets not detected

- Changing to linux-lts kernel 5.10.88

no freezing anymore.

if i use early-KMS-mode with i915-module, hdmi-monitor just goes to black after grub
if i dont use early-KMS i915-module, hdmi-monitor goes black after boot-process
but either way with the 5.10 kernel its just impossible, to switch to hdmi by xrandr, even when i replug the monitor

- setting "i915.force_probe=4c8a" in kernel-parameters

xorg does not start up

- disabling fbc and psr in kernel paramater

no difference

i will now try another distro. clear linux. it's from intel, designed for intel hardware. maybe that helps. if not, i have to send the hardware back. I need a reliable, functioning monitor-setup and Windows is no Option ;-)

Last edited by Asbestbrezel (2022-01-01 23:17:50)