X screen blanking/dpms not saving brightness

jaythespacehound · 2016-10-17 13:25:13

Hi all,
I've googled this but haven't found much.
I'm running arch on a laptop with i3.
Screen will go blank (backlight off) after 10 minutes.

I'm fine with this, but on 'awakening' the brightness resets to a low level.
This also happens on restart.
I can work around this by setting brightness in /sys/class/backlight/intel_backlight/brightness on bootup which is fine.
But I don't know if I can do something similar for when X resumes... or fix the underlying issue.

Relevant information:

xset q
Keyboard Control:
  auto repeat:  on    key click percent:  0    LED mask:  00000000
  XKB indicators:
    00: Caps Lock:   off    01: Num Lock:    off    02: Scroll Lock: off
    03: Compose:     off    04: Kana:        off    05: Sleep:       off
    06: Suspend:     off    07: Mute:        off    08: Misc:        off
    09: Mail:        off    10: Charging:    off    11: Shift Lock:  off
    12: Group 2:     off    13: Mouse Keys:  off
  auto repeat delay:  660    repeat rate:  25
  auto repeating keys:  00ffffffdffffbbf
                        fadfffefffedffff
                        9fffffffffffffff
                        fff7ffffffffffff
  bell percent:  50    bell pitch:  400    bell duration:  100
Pointer Control:
  acceleration:  2/1    threshold:  4
Screen Saver:
  prefer blanking:  yes    allow exposures:  yes
  timeout:  600    cycle:  600
Colors:
  default colormap:  0x22    BlackPixel:  0x0    WhitePixel:  0xffffff
Font Path:
  /usr/share/fonts/misc/,/usr/share/fonts/TTF/,/usr/share/fonts/OTF/,/usr/share/fonts/Type1/,built-ins
DPMS (Energy Star):
  Standby: 600    Suspend: 600    Off: 600
  DPMS is Enabled
  Monitor is On

Also in order to get the backlight keys to work I had to set the following on 'linux' line in grub.cfg (kernel parameter I guess)

 acpi_osi=

Would appreciate some help on this, it's not show stopping, just annoying
Thanks!

jaythespacehound · 2016-10-27 14:40:13

OK I take it no one's seen this?

WorMzy · 2016-10-27 14:41:51

Please don't bump.

Arch Linux

#1 2016-10-17 13:25:13

X screen blanking/dpms not saving brightness

#2 2016-10-27 14:40:13

Re: X screen blanking/dpms not saving brightness

#3 2016-10-27 14:41:51

Re: X screen blanking/dpms not saving brightness

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