[RPI3] Black and blank screen upon X start

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Re: Unable to startx Cannot open /dev/tty0 (Permission denie

Postby jyno » Tue Mar 22, 2022 12:04 pm

No .xserverrc
$this->bbcode_second_pass_code('', '
[alarm@alarmpi ~]$ mv .xserverrc xserverrc.bak
')

/boot/config.txt
$this->bbcode_second_pass_code('', '
[alarm@alarmpi ~]$ cat /boot/config.txt
# See /boot/overlays/README for all available options

dtoverlay=vc4-kms-v3d
initramfs initramfs-linux.img followkernel

# Uncomment to enable bluetooth
#dtparam=krnbt=on

[pi4]
# Run as fast as firmware / board allows
arm_boost=1
')

Black and blank screen, nothing has changed.
Htop shows that LXQt is running
$this->bbcode_second_pass_code('', '
PID+USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command
1 root 20 0 34564 9324 7684 S 0.0 1.0 0:06.61 /sbin/init
230 root 20 0 46952 14572 13692 S 0.0 1.6 0:00.67 /usr/lib/systemd/systemd-journald
246 root 20 0 27648 7296 5992 S 0.0 0.8 0:00.63 /usr/lib/systemd/systemd-udevd
255 systemd-ne 20 0 14996 6056 5452 S 0.0 0.6 0:00.23 /usr/lib/systemd/systemd-networkd
306 systemd-re 20 0 17192 9660 8332 S 0.0 1.0 0:00.39 /usr/lib/systemd/systemd-resolved
307 systemd-ti 20 0 23424 3468 2888 S 0.0 0.4 0:00.23 /usr/lib/systemd/systemd-timesyncd
309 dbus 20 0 11324 4820 4188 S 0.0 0.5 0:00.63 /usr/bin/dbus-daemon --system --address=systemd: --nofor
310 root 20 0 14420 6740 6024 S 0.0 0.7 0:00.27 /usr/lib/systemd/systemd-logind
311 root 20 0 8244 5168 4684 S 0.0 0.6 0:00.07 sshd: /usr/bin/sshd -D [listener] 0 of 10-100 startups
313 root 20 0 12204 4948 4216 S 0.0 0.5 0:00.18 login -- alarm
314 systemd-ti 20 0 23424 3468 2888 S 0.0 0.4 0:00.01 /usr/lib/systemd/systemd-timesyncd
319 root 20 0 13284 7856 6936 S 0.0 0.8 0:00.21 sshd: alarm [priv]
322 alarm 20 0 15364 8352 7364 S 0.0 0.9 0:00.45 /usr/lib/systemd/systemd --user
323 alarm 20 0 20928 3664 1800 S 0.0 0.4 0:00.00 (sd-pam)
330 alarm 20 0 13284 5296 4224 S 0.0 0.6 0:00.17 sshd: alarm@pts/0
331 alarm 20 0 3928 3248 2880 S 0.0 0.3 0:00.04 -bash
362 alarm 20 0 3928 3116 2884 S 0.0 0.3 0:00.03 -bash
363 alarm 20 0 3796 2972 2700 S 0.0 0.3 0:00.02 /bin/sh /usr/bin/startx
381 alarm 20 0 3712 956 840 S 0.0 0.1 0:00.01 xinit /home/alarm/.xinitrc -- /etc/X11/xinit/xserverrc :
382 alarm 20 0 211M 65976 49804 S 0.0 7.0 0:01.89 /usr/lib/Xorg -nolisten tcp :0 vt1 -keeptty -auth /tmp/s
384 alarm 20 0 211M 65976 49804 S 0.0 7.0 0:00.00 /usr/lib/Xorg -nolisten tcp :0 vt1 -keeptty -auth /tmp/s
385 alarm 20 0 106M 25400 22600 S 0.0 2.7 0:00.80 lxqt-session
388 alarm 20 0 11172 4284 3828 S 0.0 0.5 0:00.16 /usr/bin/dbus-daemon --session --address=systemd: --nofo
392 alarm 20 0 106M 25400 22600 S 0.0 2.7 0:00.00 lxqt-session
393 alarm 20 0 106M 25400 22600 S 0.0 2.7 0:00.00 lxqt-session
394 alarm 20 0 106M 25400 22600 S 0.0 2.7 0:00.06 lxqt-session
396 polkitd 20 0 233M 18596 15280 S 0.0 2.0 0:00.78 /usr/lib/polkit-1/polkitd --no-debug
398 polkitd 20 0 233M 18596 15280 S 0.0 2.0 0:00.00 /usr/lib/polkit-1/polkitd --no-debug
399 polkitd 20 0 233M 18596 15280 S 0.0 2.0 0:00.12 /usr/lib/polkit-1/polkitd --no-debug
400 polkitd 20 0 233M 18596 15280 S 0.0 2.0 0:00.00 /usr/lib/polkit-1/polkitd --no-debug
401 polkitd 20 0 233M 18596 15280 S 0.0 2.0 0:00.00 /usr/lib/polkit-1/polkitd --no-debug
402 polkitd 20 0 233M 18596 15280 S 0.0 2.0 0:00.00 /usr/lib/polkit-1/polkitd --no-debug
403 polkitd 20 0 233M 18596 15280 S 0.0 2.0 0:00.00 /usr/lib/polkit-1/polkitd --no-debug
')

$this->bbcode_second_pass_quote('', 'I') am running LxQT on my RPI4 without problems.

Me too. I'm using LXQt on a couple of RPI4 devices.
jyno
 
Posts: 67
Joined: Wed May 05, 2021 4:37 pm

Re: Black and blank screen upon X start

Postby jyno » Tue Mar 22, 2022 3:05 pm

Testing RPI4 (foreign) installation on RPI3

It is possible to use ArchLinux ARM RPI4 installation on RPI3 and vice versa.

I've plugged my LXQt installation which starts up with SDDM and the screen is BLACK & BLANK.

I assume, this is something related to drivers.

From Htop (connected via SSH):
$this->bbcode_second_pass_code('', '
PID USER PRI NI VIRT RES SHR S CPU%-MEM% TIME+ Command
471 sddm 20 0 342M 91980 65956 S 2.7 9.8 0:07.76 /usr/bin/sddm-greeter --socket /tmp/sddm-:0-RahntR
736 alarm 20 0 4472 3396 2616 R 2.0 0.4 0:00.61 htop
337 root 20 0 920M 37160 8692 S 1.3 4.0 0:06.89 /usr/bin/opensnitchd -rules-path /etc/opensnitchd/rules
690 root 20 0 920M 37160 8692 S 1.3 4.0 0:00.37 /usr/bin/opensnitchd -rules-path /etc/opensnitchd/rules
480 sddm 20 0 342M 91980 65956 S 0.7 9.8 0:03.24 /usr/bin/sddm-greeter --socket /tmp/sddm-:0-RahntR
1 root 20 0 34644 9536 7668 S 0.0 1.0 0:06.77 /sbin/init
245 root 20 0 38536 14360 13500 S 0.0 1.5 0:01.23 /usr/lib/systemd/systemd-journald
246 root 20 0 28256 7448 5992 S 0.0 0.8 0:00.49 /usr/lib/systemd/systemd-udevd
316 systemd-re 20 0 17204 9648 8328 S 0.0 1.0 0:00.65 /usr/lib/systemd/systemd-resolved
321 dbus 20 0 11420 4996 4188 S 0.0 0.5 0:01.08 /usr/bin/dbus-daemon --system --address=systemd: --nofork --nopidf
322 root 20 0 14340 6188 5560 S 0.0 0.7 0:00.31 /usr/lib/systemd/systemd-logind
')
jyno
 
Posts: 67
Joined: Wed May 05, 2021 4:37 pm

Re: [RPI3] Black and blank screen upon X start

Postby jyno » Tue Mar 22, 2022 3:19 pm

My observation was correct, this has something to do with drivers.
I've used the same equipment (keyboard, monitor, usb).
The only change was the device (RPI4 instead of RPI3).
See screenshot.
Attachments
alarm3_on_rpi4.png
Screenshot of Archlinux ARM for RPI3 running on RPI4
alarm3_on_rpi4.png (188.72 KiB) Viewed 1098 times
jyno
 
Posts: 67
Joined: Wed May 05, 2021 4:37 pm

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