Peppermint OS Community Forum

Support => Hardware => Topic started by: dh2012 on September 22, 2018, 11:22:41 am

Title: washed out laptop screen [SORTED]
Post by: dh2012 on September 22, 2018, 11:22:41 am
hello
ive just fitted a new screen to my lenovo thinkpad e530 the old one having been broken for the last couple of years and ive been using a external monitor , so i have forgotten what the original laptop screen looked like , this has coincided with installing peppemint 9 , now the new  laptop screen looks terrible it has a slight colour cast and lacks contrast and the colour is very weak  ,its ok for basic tasks but will be useless for photo editing or even viewing photos , now i still have the external monitor which i can use and gives excellent colours with peppermint 9  ,so this is not the end of the world

, but it would  be nice to get the laptop screen looking better ..  ive installed redshift and it just changes the colour cast , and the gui does not seem to work in peppermint .
it could be that the new screen is not very good ,
 is there any way of improving  adjusting the colour /contrast  of the laptop screen
Title: Re: washed out laptop screen
Post by: PCNetSpec on September 22, 2018, 07:45:55 pm
What's the output from
Code: [Select]
xrandr
Title: Re: washed out laptop screen
Post by: dh2012 on September 23, 2018, 04:23:03 am
thankyou for the reply

david@david-ThinkPad-Edge-E530 ~ $ xrandr
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
LVDS-1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
   1366x768      60.00*+
   1360x768      59.80    59.96 
   1280x720      60.00    59.99    59.86    59.74 
   1024x768      60.04    60.00 
   960x720       60.00 
   928x696       60.05 
   896x672       60.01 
   1024x576      59.95    59.96    59.90    59.82 
   960x600       59.93    60.00 
   960x540       59.96    59.99    59.63    59.82 
   800x600       60.00    60.32    56.25 
   840x525       60.01    59.88 
   864x486       59.92    59.57 
   800x512       60.17 
   700x525       59.98 
   800x450       59.95    59.82 
   640x512       60.02 
   720x450       59.89 
   700x450       59.96    59.88 
   640x480       60.00    59.94 
   720x405       59.51    58.99 
   684x384       59.88    59.85 
   680x384       59.80    59.96 
   640x400       59.88    59.98 
   576x432       60.06 
   640x360       59.86    59.83    59.84    59.32 
   512x384       60.00 
   512x288       60.00    59.92 
   480x270       59.63    59.82 
   400x300       60.32    56.34 
   432x243       59.92    59.57 
   320x240       60.05 
   360x202       59.51    59.13 
   320x180       59.84    59.32 
VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
david@david-ThinkPad-Edge-E530 ~ $
Title: Re: washed out laptop screen
Post by: PCNetSpec on September 23, 2018, 11:53:23 am
You might want to play with the rgb gamma and brightness in xrandr

Running:
Code: [Select]
xrandr --output LVDS-1 --gamma 1:1:1 --brightness 1
is the default

so you could try maybe
Code: [Select]
xrandr --output LVDS-1 --gamma 0.8:0.8:0.8 --brightness 1.2

gamma is in the rgb format (r:g:b) as a decimal fraction of 1 for each individual colour separated by an :

brightness is also a decimal fraction of 1

So that second command above is like setting
Red at 80%
Green at 80%
Blue at 80%
Brightness at 120%

Be aware this won't survive a reboot .. so if you make a mistake such as setting brightness to 0 .. a reboot will get you back to defaults.

But once you find settings you're happy with, it'd be pretty easy to apply it as an autostarted script.
Title: Re: washed out laptop screen
Post by: dh2012 on September 23, 2018, 03:49:14 pm
many thanks for the help , had a quick play and it makes a difference , i think i will need to spend some time to get it really sorted
                cheers
                             david
Title: Re: washed out laptop screen
Post by: PCNetSpec on September 23, 2018, 04:00:24 pm
no problem :)