I guess you have some different issue. In my case HP Folio 1040 G1 had this
that problem since kernel 4.1 and it was never fixed. But still you can analyze
dmesg for anything suspicious (maybe try it with different kernels)
Here's a command to output information into dmesg.log in your home
I changed that line so that it says:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash drm.debug=0x1e log_buf_len=4M"
and follower the rest of the steps.
when typing:
sudo dmesg | grep "Refresh Rate"
on the terminal, nothing really happens.
I am not sure I am doing that last step well, since I checked
@alepasgar
1)Edit your GRUB configuration
sudo nano /etc/default/grub
At the line with "GRUB_CMDLINE_LINUX_DEFAULT" add parameters
drm.debug=0x1e log_buf_len=4M
Ctrl+X , confirm changes with "Y"
2) sudo update-grub
3) Restart
4) sudo dmesg | grep "Refresh Rate"
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You received this bug
Hello there,
I am having a problem that sounds quite similar to yours.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1940285
Could you tell me what exactly I must type on terminal to check how my
laptop's refresh rate changes (if any), just to check if it behaves like
yours.
Thank you.
I still believe that this bug is present since initial implementation of DRRS
(kernels 4.0 and 4.1).
For now I have to disable DRRS by default with a patch. Updated version in
attachment.
** Patch added: "Patch for 5.13 and 5.14"
It'll be useful if the offending commit can be found...
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https://bugs.launchpad.net/bugs/1928138
Title:
Flickering on built-in display (Intel Haswell graphics) since
Trying to find the reason for this issue I tested kernels from
https://kernel.ubuntu.com/~kernel-ppa/mainline/ on Ubuntu 14.04
v4.0.9-wily - flickering didn't happen (but that's because DRRS wasn't
activated in the 4.0.y series)
v4.1-rc3-unstable - problem started here.
So it's quite possible
Do you know what's the offending commit?
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https://bugs.launchpad.net/bugs/1928138
Title:
Flickering on built-in display (Intel Haswell graphics) since kernel
v4.1
No, I made it for myself (using another patch
(https://bugs.freedesktop.org/show_bug.cgi?id=91393#c31) as a reference
for adding i915 module parameter). Not sure if upstream would accept it.
This patch doesn't fix root issue but provides ability to disable DRRS
power-saving feature which causes it
Is the patch in upstream Linux?
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https://bugs.launchpad.net/bugs/1928138
Title:
Flickering on built-in display (Intel Haswell graphics) since kernel
v4.1 [bisected and
** Tags added: patch
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https://bugs.launchpad.net/bugs/1928138
Title:
Flickering on built-in display (Intel Haswell graphics) since kernel
v4.1 [bisected and workaround
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