Flickerfree boot/fastboot?

reading about the additional flickerfree boot in combination with smooth boot for my laptop got me excited (device is an intel 3rd gen card & i915 driver, kernel 4.19).

for this i created a /etc/modprobe/i915.conf

options i915 fastboot=1

well it did not make much of a difference after a reboot, so i had quick a look at my syslog:

kernel [Firmware Bug]: ACPI(DGFX) defines _DOD but not _DOS
kernel [drm:intel_set_cpu_fifo_underrun_reporting [i915]] ERROR uncleared fifo underrun on pipe A
kernel [drm:intel_cpu_fifo_underrun_irq_handler [i915]] ERROR CPU pipe A FIFO underrun
kernel [drm:intel_set_pch_fifo_underrun_reporting [i915]] ERROR uncleared pch fifo underrun on pch transcoder A
kernel [drm:cpt_irq_handler [i915]] ERROR PCH transcoder A FIFO underrun
kernel radeon 0000:01:00.0: failed VCE resume (-110).

for now i have deleted /etc/modprobe/i915.conf and all is back to normal - except for the vce resume error in syslog, which seems to be an unresolved kernel bug with my (second) radeon card.

is there anything i can do to activate flickerfree boot, too?

In /etc/mkinitcpio.conf in add MODULES="i915" and sudo mkinitcpio -P && sudo update-grub

1 Like

you mean this + the above /etc/modprobe/i915.conf?

adding this and it works like charm, thank you mate.

btw, what is the preferred method - grub_cmdline or files in /etc/modprobe.d/? i chose the latter one so to have a more vanilla-like grub (prevent pacsaves).

I used 1st as I don't have any file in modprobe.d

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