LCD backlight remains off
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| | kde-workspace |
Fix Released
|
Medium
|
||
| | plasma-workspace (Ubuntu) |
Undecided
|
Unassigned | ||
Bug Description
After an inactivity timeout, the screen backlight is powered off, but on activity (mouse, keystroke, etc)
the lamp is not switched on.
In the dark screen I can barely see the login page, and if I login, with the help of a torch I can turn the light on via the systray icon,
or via SSH from another machine writing to /sys/class/
Bug is in Ubuntu 15.04 and Ubuntu 15.10
| Changed in plasma-workspace (Ubuntu): | |
| status: | New → Confirmed |
| Matteo Croce (teknoraver) wrote : | #1 |
| Matteo Croce (teknoraver) wrote : | #2 |
Happens to me too, VERY annoying
Created attachment 95043
how to fix
This is how I have to enable the backlight again every time, using a torch
Created attachment 95044
how to fix
Created attachment 95045
login
SDDM is active, I can login by typing blindly
| Changed in kde-workspace: | |
| importance: | Unknown → Medium |
| status: | Unknown → New |
|
|
#8 |
do you have a intel video card? What kernel?
|
|
#9 |
Created attachment 95609
emerge --info
|
|
#10 |
one more data point, seems that when I plug / unplug my charger cable it fixes the problem and the back light comes back on!
yes, power plug / unplug actually works
| Changed in kde-workspace: | |
| status: | New → Fix Released |
I have to use xbacklight -inc 100 to turn my backlight on my laptop after prolonged lcd sleep.
Reproducible: Sometimes
Steps to Reproduce:
1. let kde go to power save mode
2. wake up using mouse
3. no backlight
Actual Results:
no backlight for my laptop screen
Expected Results:
backlight for my laptop screen
if I have a monitor pluged in it does come on just not my laptop screen.