[SOLVED] Multi-seconds desktop freeze adjusting brightness on my 2008 MacBook

[alxdrl]

Hi,

Adjusting brightness on my 2008 MacBook freezes the desktop for about 8-10 seconds.

The freeze happens either adjusting with the keyboard, through the power applet, or through the /sys/class/brightness interface :

Code: Select all

 sudo tee /sys/class/backlight/intel_backlight/brightness <<< 100

Switching to VT (Ctrl+Alt+Fx) and adjusting brightness through /sys/class/backlight does not freeze the computer

Any thoughts ?

Laptop : Early 2008 Macbook 2,4Ghz (Macbook4,1)
System : LM18.3 Cinnamon

[alxdrl]

Noticed the following in dmesg output:

[drm:drm_atomic_helper_commit_cleanup_done [drm_kms_helper]] *ERROR* [CRTC:30:pipe A] flip_done timed out

After a bit of searching found something here : https://bbs.archlinux.org/viewtopic.php?id=218581

Tried the proposed solution of adding "video=SVIDEO-1:d "to the kernel command line

Firts edit /etc/default/grub :

$ sudo vi /etc/default/grub

Update GRUB_CMDLINE_LINUX_DEFAULT

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=SVIDEO-1:d"
GRUB_CMDLINE_LINUX=""
:

Update Grub

$ sudo update-grub

=> Works for me ! Extra bonii : boot and shutdown are significantly faster

Now, what would it take to avoid this extra step on a fresh install ?

Cheers