Arch Linux

ljh8181aa

Member

Registered: 2017-06-04

Posts: 1

i915 enable_rc6=1, enable_fbc=1 and semaphores=1 options

Hello.

I tried to set my 965MG laptop intel graphic card powersave option by following below link.

https://wiki.archlinux.org/index.php/in … ng_Options

My /etc/modprobe.d/i915.conf is

options i915 enable_rc6=1 enable_fbc=1 semaphores=1

And /etc/mkinitcpio.conf

MODULES="intel_agp i915"

# BINARIES                                                                     
# This setting includes any additional binaries a given user may               
# wish into the CPIO image.  This is run last, so it may be used to             
# override the actual binaries included by a given hook                         
# BINARIES are dependency parsed, so you may safely ignore libraries           
BINARIES=""

# FILES                                                                         
# This setting is similar to BINARIES above, however, files are added           
# as-is and are not parsed in any way.  This is useful for config files.       
FILES="/etc/modprobe.d/i915.conf"

And I did following command.

❯ sudo mkinitcpio -p linux

I tried exactly what it says on the page, but when I check with ❯ sudo systool -m i915 -av after reboot,

    enable_rc6          = "0"
    enable_fbc          = "1"
    semaphores          = "0"

so rc6 and semaphores are not being changed.

Only time when they are bing changed is when I disabled kms by putting  i915.modeset=0 in grub boot parameters but that is not what I desire to be working. :<

And I already tried to put i915.enable_rc6=1 etc to  grub boot parameters but had no luck.

Any Ideas?

Last edited by ljh8181aa (2017-07-08 03:46:39)

Gusar

Member

Registered: 2009-08-25

Posts: 3,607

Re: i915 enable_rc6=1, enable_fbc=1 and semaphores=1 options

Your 965GM is too old to have rc6. Probably also too old to have semaphores.