Raspiblitz: White Screen after every Boot, maybe because of newest Kernel?

[phenomeus]

Hi everybody,

I have a white screen that is not going away, i think its dead (but still powered on?) or maybe that came after kernel updates etc. can‘t say for sure, i noticed it too late.

uname -a: Linux raspberrypi 5.4.51-v7l+ #1327 SMP Thu Jul 23 11:04:39 BST 2020 armv7l GNU/Linux

Any idea how to debug and get it to work again? I already tried to power down the pi and removed the power cord.

Thanks in advance

[phenomeus]

It looks like a kernel and driver issue

https://github.com/goodtft/LCD-show/issues/223

[phenomeus]

There is a fork that is updated to work with newest kernel, trying right now myself , will report back. its working. Reapplying the screen rotation again

sudo rm -rf LCD-show
git clone https://github.com/MrYacha/LCD-show.git
chmod -R 755 LCD-show
cd LCD-show/
sudo ./LCD35-show

[phenomeus]

Rotation activation by menu brings back white screen. Will debug further

[phenomeus]

I created two pull requests. My screen is working again and is rotated correctly.

(Sorry for 2 patches, I’m still learning how to use github ;) )

[phenomeus]

I have to rotate the touchscreen also, 180 degree

[phenomeus]

Touch screen rotation also fixed and tested. Logic had to be turned around. PR is online

[rootzoll]

Thanks .. hope to find time to review your changes in the next days.

[frennkie]

I have this issue too.

[frennkie]

@phenomeus wouldn't the three PRs better be put into one..? Would be great if you could look into that.

Would also be nice to have a more descriptive branch name... Then it would be easier for me to quickly check out yand test your proposed changes.

[phenomeus]

Totally agree but I’m a GitHub newb :) seriously no idea how to merge my 3 prs and work with branches.

Open to any guidance.

[frennkie]

But you do use the command line, right?!

In general I would recommend you go have a look some tutorials.. but here are the essential steps:

git remote add phenomeus https://github.com/phenomeus/raspiblitz.git
git remote add upstream https://github.com/rootzoll/raspiblitz.git
git fetch --all --prune
checkout -b fix-white-screen upstream/v1.6
git merge phenomeus/patch-2
git merge phenomeus/patch-3
git merge phenomeus/patch-4
git push -u phenomeus fix-white-screen

[frennkie]

Are actually all changes needed? Or is this sufficient:

Step 1) Update kernel

sudo apt update
sudo apt full-upgrade
/home/admin/XXshutdown.sh reboot  # not sure if needed

Step 2)

sudo sed -i "s/^dtoverlay=.*/dtoverlay=waveshare35a:rotate=90/g" /boot/config.txt
rm -rf /home/admin/LCD-show
git clone https://github.com/MrYacha/LCD-show.git /home/admin/LCD-show
cd /home/admin/LCD-show/
sudo ./LCD35-show  # this will reboot

[phenomeus]

Thanks for the input.

First you have to use a fork for lcdshow

Than modify to waveshare35a

Than fix rotation logic

[frennkie]

Thanks for the input.

Will you consolidate the PRs? Or should we do it?

[ChuckNorrison]

testing this right now

// Can confirm, this issues hits me after rpi-update and as already found the kernel was updated to 5.4.51.

// need chmod +x LCD35-show to execute that script after git clone
-> execute prints: -> mkdir: cannot create directory ‘/etc/X11/xorg.conf.d’: File exists
Is this bad? Iam using the recommended screen which works fine till the rpi-update.

admin@raspberrypi /etc/X11/xorg.conf.d $ cat 99-calibration.conf 
Section "InputClass"
        Identifier      "calibration"
        MatchProduct    "ADS7846 Touchscreen"
        Option  "Calibration"   "3936 227 268 3880"
        Option  "SwapAxes"      "1"
EndSection

// after reboot from LCD35-show, screen is still not working

// selected the LCD-Rotate setting from menu after update lcdrotate.sh, still no screen after reboot.

// i started the SCREEN from menu. Flashing up some errors, i took a screen here:

# calibrating touchscreen ...
error='not installed'
Unable to connect to X server
error='aborted'
Starting the main menu ...

// /config-scripts/blitz.lcd.sh seems to be updated to waveshare35a too

// updated all the files manually cause iam afraidto set this as branch. still need to get into all this shell scripts

// does not work for me, i dont know

[phenomeus]

Thanks for the input.

Will you consolidate the PRs? Or should we do it?

Please do it, pretty busy right now

[rootzoll]

OK i implemented it now that way that on boot it will check if the kernel was updated and may correct the LCD driver then.

Also the lcd scripts now should check what kernal is running and use the correct rotation setting.

I was not able to test the kernel upgrade because sudo apt-get upgrade resulted in:

E: Failed to fetch http://raspbian.raspberrypi.org/raspbian/pool/main/w/webkit2gtk/libjavascriptcoregtk-4.0-18_2.28.3-2~deb10u1+rpi1_armhf.deb  404  Not Found [IP: 93.93.128.193 80]

So final testing is still TODO ... with upgrading kernel to see if it automatically adapts and to see if screen rotation is then working correctly.

[frennkie]

404 errors on apt-get upgrade...? Either the source has a - yet unnoticed - (temporary or permanent) problem or you forgot to run apt-get update.

[rootzoll]

@frennkie ah ok I tried apt-get update again and now the upgrade is working. Not sure why it was not working the first time. thanks.

[rootzoll]

OK this looks good now. When I upgrade the kernel on a fresh v1.6.0 and then restart it picks up on boot that the kernel has changed and updates the drivers.

The touchchscreen rotation gets messed up on LCD rotation ... maybe make a v1.7 issue to automatically call "calibration" after turning on LCD or doing rotation.

Last thing to test before release: If then a v1.6.1 (that will still have the old kernel because base sd card image will be changed on service release) will run thru good on recovering with touch screen.

[rootzoll]

Recoverings with v1.6.1 and Touchscreen went well. Closing issue for v1.6.1 release.

[uninflatable]

Hi, I updated today my rasiplitz from 1.6.0 to 1.6.1 using the image: https://raspiblitz.org/raspiblitz-v1.6.1-2020-10-20.img.gz

after installing 1.6.1 I get a white screen and with SSH I can't connect any longer. Please advise

[ChuckNorrison]

@uninflatable you need to recreate your sd card and boot from it regulary to get into the recovery process.

[uninflatable]

@ChuckNorrison excellent - this worked fine! Thank you for your support!