Add backlight(8)

[manu]

Summary

This tool is used to configure registered backlights.
It can incr/decr (default to 10%) or accept a percentage value directly.

[zeising]

usr.bin/backlight/backlight.8

81

Should we xref acpi_video as well, since it can be used for the same thing (amongts other things). You should probably add the xref in acpi_video to this tool as well.

[manu]

usr.bin/backlight/backlight.8

81

I don't think so, for me acpi_video is useless.
It doesn't work on all (minus one not tested) my laptops without loading the drm driver and sometimes doesn't even work after.

[zeising]

usr.bin/backlight/backlight.8

81

Since a lot of people and guides mention acpi_video, and specifically the brightness sysctl, I thought it was a good idea, to draw attention to this tool.

[manu]

usr.bin/backlight/backlight.8

81

I plan to send a mail to current/x11 after commiting all this, I think this will draw more attention than in a man page that people won't read if they know about the sysctl :)

[zeising]

usr.bin/backlight/backlight.8

81

ok :)

[val_packett.cool]

share/man/man9/Makefile

13 ↗

(On Diff #76402)

I guess this patch needs to change the man8 makefile? This man9 thing was already in D26250

[manu]

Don't add the man9 page here

[gbe]

LGTM!

[manu]

Add support for -i to query backlight info.