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Diffstat (limited to 'man/systemd-backlight@.service.xml')
| -rw-r--r-- | man/systemd-backlight@.service.xml | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/man/systemd-backlight@.service.xml b/man/systemd-backlight@.service.xml index 453afbf1b4..21c6437efa 100644 --- a/man/systemd-backlight@.service.xml +++ b/man/systemd-backlight@.service.xml @@ -58,7 +58,14 @@ is a service that restores the display backlight brightness at early boot and saves it at shutdown. On disk, the backlight brightness is stored in - <filename>/var/lib/systemd/backlight/</filename>.</para> + <filename>/var/lib/systemd/backlight/</filename>. During + loading, if udev property + <option>ID_BACKLIGHT_CLAMP</option> is not set to + false value, the brightness is clamped to a value of + at least 1 or 5% of maximum brightness, whichever is + greater. This restriction will be removed when the + kernel allows user space to reliably set a brightness + value which does not turn off the display.</para> </refsect1> <refsect1> |