Read the statement by Michael Teeuw here.
4 inch RPi LCD displaying MM not working
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@lavolp3 thanks for taking the time to reply. Unfortunately, this site hasn’t helped much. When I plug in via HDMI to my tele, everything works perfectly. However the small LCD screen does not use HDMI. Instead, it plugs into the GPIO. As for the resolution, this is what’s printed on the back of the screen so, all I can go by. I think I’m missing something in the /boot/config.txt that changes the video display from HDMI. Still no luck just yet.
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@aecandroid said in 4 inch RPi LCD displaying MM not working:
Have you tried the installation from here?
https://www.waveshare.com/wiki/4inch_RPi_LCD_(A)
It should work with the waveshare description.
Can you post your config.txt here or at least the last 10 rows? -
@lavolp3 Below is my /boot/config.txt I used the drivers for LCD-show from the waveshare link above.I’ve done a fresh install on a new SD got everything up an running on Magic Mirror using HDMI as normal on the Raspberry PI Zero W. Then I do the LCD-show install and ./LCD4-show command. The device reboots and the LCD goes from white backlight to showing the boot cmd line. From there, it almost appears to get stuck. instead of seeing the pi@raspberry: the last line displayed is [ ok ] Started OpenBSD Secure Shell Server.
Thanks again for your help. Let me know if you need to see any other code.
# For more options and information see # http://www.raspberrypi.org/documentation/configuration/config-txt.md # Some settings may impact device functionality. See link above for details # uncomment if you get no picture on HDMI for a default "safe" mode #hdmi_safe=1 # uncomment this if your display has a black border of unused pixels visible # and your display can output without overscan #disable_overscan=1 # uncomment the following to adjust overscan. Use positive numbers if console # goes off screen, and negative if there is too much border #overscan_left=16 #overscan_right=16 #overscan_top=16 #overscan_bottom=16 # uncomment to force a console size. By default it will be display's size minus # overscan. #framebuffer_width=1280 #framebuffer_height=720 # uncomment if hdmi display is not detected and composite is being output hdmi_force_hotplug=1 # uncomment to force a specific HDMI mode (this will force VGA) #hdmi_group=1 #hdmi_mode=1 # uncomment to force a HDMI mode rather than DVI. This can make audio work in # DMT (computer monitor) modes #hdmi_drive=2 # uncomment to increase signal to HDMI, if you have interference, blanking, or # no display #config_hdmi_boost=4 # uncomment for composite PAL #sdtv_mode=2 #uncomment to overclock the arm. 700 MHz is the default. #arm_freq=800 # Uncomment some or all of these to enable the optional hardware interfaces dtparam=i2c_arm=on #dtparam=i2s=on dtparam=spi=on enable_uart=1 # Uncomment this to enable the lirc-rpi module #dtoverlay=lirc-rpi # Additional overlays and parameters are documented /boot/overlays/README # Enable audio (loads snd_bcm2835) dtparam=audio=on dtoverlay=waveshare35a #dtoverlay=ads7846,cs=1,penirq=17,penirq_pull=2,speed=1000000,keep_vref_on=1,swapxy=0,pmax=255,xohms=60,xmin=200,xmax=3900,ymin=200,ymax=3900 hdmi_force_hotplug=1 #max_usb_current=1 hdmi_group=2 hdmi_mode=1 hdmi_mode=87 hdmi_cvt 480 320 60 6 0 0 0 hdmi_drive=2 display_rotate=0 -
@aecandroid @lavolp3 So Just as an update, I tried to run
./LCD-hdmiand thensudo reboot. Plugged into the HDMI, the Pi reboots, LCD in the GPIO goes white, Pi boots topi@raspberry:and does not start MM. The only change is the install of LCD-show; change driver to LCD4-show; back to LCD-hdmi; and MagicMirror no longer works? I even tried doingnpm startin/MagicMirrorand got nothing. I also triedsh mm.shand got nothing. I don’t get what happens in the LCD-show install but it kills MagicMirror. I have a backup image of when its working on HDMI, so that’s my reset point at the moment. Not sure what to do, may just need to go for an HDMI display in the end. Anyway, thanks again for your help and suggestions. -
Having been in quarantine, I’ve had a chance to sit down and try to sus out the issue. Everything seems to work 100% fine right up until I install
LCD-show. After installingLCD-showand doing a reboot, MM never auto starts. I tried to run./mmstart.shand the results are below.Linux raspberrypi 4.19.58+ #1245 Fri Jul 12 17:20:08 BST 2019 armv6l The programs included with the Debian GNU/Linux system are free software; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright. Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law. Last login: Sat Apr 11 19:25:01 2020 SSH is enabled and the default password for the 'pi' user has not been changed. This is a security risk - please login as the 'pi' user and type 'passwd' to set a new password. pi@raspberrypi:~ $ ls chromium_start.sh mmstart.sh package-lock.json LCD-show node-v10.16.0-linux-armv6l MagicMirror node-v10.16.0-linux-armv6l.tar.xz pi@raspberrypi:~ $ ./mmstart.sh Starting MagicMirror: v2.8.0 Loading config ... Loading module helpers ... No helper found for module: alert. No helper found for module: clock. Initializing new module helper ... Module helper loaded: calendar No helper found for module: MMM-TFL. No helper found for module: currentweather. No helper found for module: weatherforecast. Initializing new module helper ... Module helper loaded: MMM-UKNationalRail All module helpers loaded. Starting server on port 8080 ... Server started ... Connecting socket for: calendar Starting node helper for: calendar Connecting socket for: MMM-UKNationalRail MMM-UKNationalRail helper started ... Sockets connected & modules started ... Ready to go! Please point your browser to: http://localhost:8080 Whoops! There was an uncaught exception... { Error: listen EADDRINUSE: address already in use 127.0.0.1:8080 at Server.setupListenHandle [as _listen2] (net.js:1279:14) at listenInCluster (net.js:1327:12) at GetAddrInfoReqWrap.doListen [as callback] (net.js:1460:7) at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:61:10) code: 'EADDRINUSE', errno: 'EADDRINUSE', syscall: 'listen', address: '127.0.0.1', port: 8080 } MagicMirror will not quit, but it might be a good idea to check why this happened. Maybe no internet connection? If you think this really is an issue, please open an issue on GitHub: https://github.com/MichMich/MagicMirror/issues X.Org X Server 1.20.4 X Protocol Version 11, Revision 0 Build Operating System: Linux 4.15.0-48-generic armv8l Raspbian Current Operating System: Linux raspberrypi 4.19.58+ #1245 Fri Jul 12 17:20:08 BST 2019 armv6l Kernel command line: coherent_pool=1M 8250.nr_uarts=1 bcm2708_fb.fbwidth=480 bcm2708_fb.fbheight=320 bcm2708_fb.fbswap=1 smsc95xx.macaddr=B8:27:EB:B2:0B:D5 vc_mem.mem_base=0x1ec00000 vc_mem.mem_size=0x20000000 dwc_otg.lpm_enable=0 console=ttyS0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait fbcon=map:10 fbcon=font:ProFont6x11 logo.nologo Build Date: 05 June 2019 12:49:54PM xorg-server 2:1.20.4-1+rpt1 (https://www.debian.org/support) Current version of pixman: 0.36.0 Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. (==) Log file: "/var/log/Xorg.0.log", Time: Sat Apr 11 19:27:57 2020 (==) Using system config directory "/usr/share/X11/xorg.conf.d" (EE) Fatal server error: (EE) no screens found(EE) (EE) Please consult the The X.Org Foundation support at http://wiki.x.org for help. (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information. (EE) (EE) Server terminated with error (1). Closing log file. xinit: giving up xinit: unable to connect to X server: Connection refused xinit: server error pi@raspberrypi:~ $I’ve attached copy of the
Xorg.0.log. It appears the main issue is there is no screen selection or default monitor. Any help is greatly appreciated.GNU nano 3.2 Xorg.0.log [ 1272.263] X.Org X Server 1.20.4 X Protocol Version 11, Revision 0 [ 1272.264] Build Operating System: Linux 4.15.0-48-generic armv8l Raspbian [ 1272.264] Current Operating System: Linux raspberrypi 4.19.58+ #1245 Fri $[ 1272.264] Kernel command line: coherent_pool=1M 8250.nr_uarts=1 bcm2708_f$[ 1272.265] Build Date: 05 June 2019 12:49:54PM [ 1272.265] xorg-server 2:1.20.4-1+rpt1 (https://www.debian.org/support) [ 1272.265] Current version of pixman: 0.36.0 [ 1272.265] Before reporting problems, check http://wiki.x.org ��������to make sure that you have the latest version. [ 1272.265] Markers: (--) probed, (**) from config file, (==) default setti$��������(++) from command line, (!!) notice, (II) informational, ��������(WW) warning, (EE) error, (NI) not implemented, (??) unknown. [ 1272.267] (==) Log file: "/var/log/Xorg.0.log", Time: Sat Apr 11 19:45:42$[ 1272.269] (==) Using system config directory "/usr/share/X11/xorg.conf.d" [ 1272.279] (==) No Layout section. Using the first Screen section. [ 1272.283] (==) No screen section available. Using defaults. [ 1272.284] (**) |-->Screen "Default Screen Section" (0) [ 1272.284] (**) | |-->Monitor "<default monitor>" [ 1272.288] (==) No device specified for screen "Default Screen Section". ��������Using the first device section listed. [ 1272.288] (**) | |-->Device "Allwinner A10/A13 FBDEV" [ 1272.288] (==) No monitor specified for screen "Default Screen Section". ��������Using a default monitor configuration. [ 1272.289] (==) Automatically adding devices [ 1272.289] (==) Automatically enabling devices [ 1272.289] (==) Automatically adding GPU devices [ 1272.289] (==) Max clients allowed: 256, resource mask: 0x1fffff [ 1272.290] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exi$[ 1272.290] Entry deleted from font path. [ 1272.290] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exis$[ 1272.290] Entry deleted from font path. [ 1272.290] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.[ 1272.291] Entry deleted from font path. [ 1272.291] (WW) The directory "/usr/share/fonts/X11/Type1" does not exist. ������������������������������[ Read 76 lines ] ^G Get Help ^O Write Out ^W Where Is ^K Cut Text ^J Justify ^X Exit��������^R Read File ^\ Replace ^U Uncut Text ^T To Spell -
@aecandroid the lcd is probably not DISPLAY :0… which mm.sh sets.
Boot, open terminal window and dump the env looking for display
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@aecandroid look at that /home/pi/chromium_start.sh
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@sdetweil I did, sorry, should’ve mentioned.
This is the code:
/bin/sh unclutter & xset -dpms # disable DPMS (Energy Star) features. xset s off # disable screen saver xset s noblank # don’t blank the video device matchbox-window-manager & #midori -e Fullscreen -a http://localhost:8080 chromium-browser --incognito --kiosk http://localhost:8080/
