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domp

Member

Registered: 2020-03-31

Posts: 1

Displayport flickering, turn on-off every 5-30sec

[Dell] [e7240] [Intel] [Haswell]
[5.5.13-arch2-1] [Wayland] [SwayWM]

Hi,

My display setup: builtin display (eDP-1), monitor on HDMI (HDMI-A-1), monitor on Displayport (DP-1).
Everything is good, except the displayport monitor, it's sometimes flickering, sometimes not, but constantly turn off and on again, every 5-30 seconds.
I use wayland, but tested on X11 and nothing changed.

Kernel modules intel_agp i915
Kernel parameters: i915.modeset=1 i915.enable_psr=0 i915.enable_guc=2

I searched on google so many hours, without any success. Please help

------------------------------------------------------------------------------------------------------------
dmesg | grep i915

[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=... rw loglevel=3 quiet splash i915.modeset=1 i915.enable_psr=0 i915.enable_guc=2
[    0.149617] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=... rw loglevel=3 quiet splash i915.modeset=1 i915.enable_psr=0 i915.enable_guc=2
[    1.534982] i915 0000:00:02.0: Incompatible option enable_guc=2 - GuC is not supported!
[    1.534983] i915 0000:00:02.0: Incompatible option enable_guc=2 - HuC is not supported!
[    1.535157] i915 0000:00:02.0: vgaarb: deactivate vga console
[    1.541090] i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
[    1.584219] [drm] Initialized i915 1.6.0 20191101 for 0000:00:02.0 on minor 0
[    1.628035] fbcon: i915drmfb (fb0) is primary device
[    1.630299] i915 0000:00:02.0: fb0: i915drmfb frame buffer device
[    4.065023] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])

heavyjoe

Member

Registered: 2019-06-19

Posts: 8

Re: Displayport flickering, turn on-off every 5-30sec

Hi

I had a similar problem lately where my display-port monitor had a vertical pixel lane that showed up sometimes and then didn't...
When I searched for solutions I found out that i had simply a bad display port cable. changed it and everything worked. Maybe in your case too or did you solve the problem?

Greetings

frankieboy

Member

Registered: 2009-04-12

Posts: 65

Re: Displayport flickering, turn on-off every 5-30sec

I tested this also on a Dell Xps 15 7590 with an ASUS MB16AC monitor, under wayland, the screen flickers and has a wrong resolution (not full HD, lower), under X, it's perfectly fine, so I think it's a driver issue under wayland, in dmesg, I can see the following:
i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful

BR