Anyone else experiencing issues after updating Raspbian (black screen and wifi dropping)

yep_DD

Hi guys,

I have updated Raspbian yesterday and ever since my mirror runs for a few minutes and then the screen goes blank. Nothing is in the logs and electron is still running. When I restart it -occassionally- I get resolve errors for github and stuff like that. But pin g / curl and everything works fine via shell.

edit: Webinterface is running. Could it be that the screensaver is active? I have always had it disabled in the LXDE and LXDE-pi config.

Any ideas?

KR,

Stephan

yep_DD

Solution for screensaver blanking:

add:

@xset s noblank 
@xset s off 
@xset -dpms

to:

/home/pi/.config/lxsession/LXDE-pi/autostart

Note: setting it in

 /etc/xdg/lxsession/LXDE-pi/autostart or /etc/xdg/lxsession/LXDE/autostart

did not work anymore, the user files take precedence.

I don’t know why it changed with the latest Raspbian Update or what I did wrong, but if I don’t add the xset commands as above and check with

DISPLAY=:0 xset -q

the screensaver stays enabled. If you guys need to verify it is disabled, just run the above command and check if the following lines appear like that:

Screen Saver:
  prefer blanking:  no    allow exposures:  yes
  timeout:  0    cycle:  600

DPMS (Energy Star):
  Standby: 600    Suspend: 600    Off: 600
  DPMS is Disabled

If blanking and timeout are yes and not 0 the screensaver is active (DPMS should also show disabled)

yep_DD

Update: it seems all the xset options I set are now being ignored, manually disabling the screensaver brings the mirror back.

Update2: It seems also the wifi connections now gets reset every couple of minutes which may cause the resolve error I saw earlier in the logs

yep_DD

Solution for screensaver blanking:

add:

@xset s noblank 
@xset s off 
@xset -dpms

to:

/home/pi/.config/lxsession/LXDE-pi/autostart

Note: setting it in

 /etc/xdg/lxsession/LXDE-pi/autostart or /etc/xdg/lxsession/LXDE/autostart

did not work anymore, the user files take precedence.

I don’t know why it changed with the latest Raspbian Update or what I did wrong, but if I don’t add the xset commands as above and check with

DISPLAY=:0 xset -q

the screensaver stays enabled. If you guys need to verify it is disabled, just run the above command and check if the following lines appear like that:

Screen Saver:
  prefer blanking:  no    allow exposures:  yes
  timeout:  0    cycle:  600

DPMS (Energy Star):
  Standby: 600    Suspend: 600    Off: 600
  DPMS is Disabled

If blanking and timeout are yes and not 0 the screensaver is active (DPMS should also show disabled)

yep_DD

For Wifi Problems I added:

iwconfig wlan0 power off

to

sudo nano /etc/rc.local

now checking the output with

iwconfig wlan0

gives me:

Power Management:off

let’s see if it is solved.

MWel1977

@yep_DD
Hi There Stephan, I have the same problem with the black screen.
After start the MM runs for some time and then it just goes to a black screen.

I added the 3 lines to the autostart file and checked if the timeout and prefer blanking are set to 0 and no… and they are!
I’m running MM2 this moment on a 24" screen to see if it stays on.
I’ll let it run for some time. Hope it stays on!

THANKS for the tutorial.

Kind regards Mike

yep_DD

@mwel1977 let me know if it worked :). Was it “600 and yes” before the change?

MWel1977

@yep_DD I don’t know what the values were before I changed it but the values are currently NOT “yes” but “0” and “no”. And I didn’t let the MagicMirror just sit there doing nothing yesterday…
I was installing modules and testing them. :smiling_face_with_halo: :smiling_face_with_halo:
But I need to solve a module error tonight so I’ll start the MagicMirror as soon as I get home so it can stay like that for about an hour. If it’s still on then it’s okay! :thumbs_up:
I’ll let you know!

MWel1977

@yep_DD the MagicMirror is running almost 4 hours strait on end now.
I would call that: screensaver disabled!:winking_face:

robiv8

i have the latest Stretch and no folder lxsession in /.config
what now?

Sorry, I found it

Note: setting it in
/etc/xdg/lxsession/LXDE-pi/autostart or /etc/xdg/lxsession/LXDE/autostart