Hi all,
I have a Chuwi Gemibook 13 Laptop now running Fedora 36.
My problem is the following. If i run kernels major than 5.15.16.200 (Was released with F35) the laptop screen flicker horizontally. Specially when moving mouse. With 5.15.16.200 all works fine.
In my understanding the video driver loaded is i915.
here the modinfo i915 head result
filename: /lib/modules/5.15.16-200.fc35.x86_64/kernel/drivers/gpu/drm/i915/i915.ko.xz
license: GPL and additional rights
description: Intel Graphics
author: Intel Corporation
author: Tungsten Graphics, Inc.
Kernel 5.19.13.200 is shipped with a different file of the same driver.
But also if i put the working version (5.15.16) when I boot in 5.19.13 I experience the horizontal flickering. (Checked that loaded module is correct).
comparing the dmesg log for the Good 5.15.16 Boot vs Wrong 5.19.13 I have noticed the following delta
[ 2.614577] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 0
Note the “on minor 0”
In the problematic boot i have minor 1
[ 4.282920] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 1
I’m not sure if this difference can be the reason of flickering.
I understood that minor is in some way related to driver version but in this case comparing modinfo results of the both boot i have the same result.
Kernel 5.19.12 was known for problems with intel video on laptops. That has already been replaced with (progressed to) 5.19.15 and 5.19.16 is in the works apparently due to wifi issues with 5.19.15.
Ciao, try live-booting Fedora 37, official images are already available: Test Results:Fedora 37 RC 1.7 Desktop - Fedora Project Wiki
If this flickering is still visible on F37, post here output of sudo inxi -Fmaz and dmesg --level=err,warn.
Ciao,
thanks for your reply.
On live-booting F37 flickering is not present.
Consider that also with live-booting F36 i had no flickering.
But on my installed version, only Kernel 5.15.16-200.fc35.x86_64 works without flickering.
Furthermore this is still a F35 kernel.
Do you have any ideas on what can cause this issue ?
Consider that the only delta i was able to identify between 5.16.15 boot and 5.19.13 was
“on minor 0” that change in ‘on minor 1’ for kernels with flickering.
Working
[ 2.614577] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 0
Not Working
[ 4.282920] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 1
First of all we need to check whether that this issue persists with latest updates. Use dnf versionlock to keep the last known working kernel and make sure your system is up to date:
Hi, I have updated the system.
Now last kernel installed is : 6.0.7.-200.fc36.x86_64. Unfortunately if i boot with the new kernel flickering is still there.
I made i video but i’m not able to upload into the forum page.
I’m not sure but considering the with live version both F36 and F37 I do not have flickering
I think that it can be something related to my installed version.
That might be dependent on kernel/microcode pair, compare output of inxi -Ca of installed and live-booted system, loaded microcode will be in a 4th row.
Search for 5.15 Intel GPU flickering and try kernel boot parameters that others found helpful.
With above findings create a bug report in bugzilla, explain which kernels work (5.15.16 and all newer live-booted), that 5.15.17 brought regression, paste inxi -SMGCaz output and write what you’ve found out about microcode and kernel boot parameters.