Beaglebone Black missing frame buffer, ie /dev/fb0 does not exist
Created by: Andrew553328
/dev/fb0 does not exist Linux beaglebone 4.19.94-ti-r42 #1buster SMP PREEMPT Tue Mar 31 19:38:29 UTC 2020 armv7l GNU/Linux
also using
Linux beaglebone 4.14.108-ti-r113 #1 (closed) SMP PREEMPT Wed Jul 31 00:01:10 UTC 2019 armv7l GNU/Linux has no /dev/fb0
a much older image: Linux fft-gate-cam 3.8.13-bone40 #1 (closed) SMP Fri Jan 31 07:31:37 UTC 2014 armv7l GNU/Linux does have /dev/fb0
Beagle Bone black No capes
Describe your hardware
Describe any Capes Installed
Please run this built-in script
sudo /opt/scripts/tools/version.sh
git:/opt/scripts/:[b39ec679648a6be8f25f48bd1c9784c1fc5a0c46]
eeprom:[A335BNLT00C02814BBBK1822]
model:[TI_AM335x_BeagleBone_Black]
dogtag:[BeagleBoard.org Debian Buster IoT Image 2020-04-06]
bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot 2019.04-00002-g07d5700e21]:[location: dd MBR]
bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot 2014.04-00014-g47880f5]:[location: fatfs /boot/uboot/MLO]
UBOOT: Booted Device-Tree:[am335x-boneblack-uboot-univ.dts]
UBOOT: Loaded Overlay:[AM335X-PRU-RPROC-4-19-TI-00A0]
UBOOT: Loaded Overlay:[BB-ADC-00A0.bb.org-overlays]
UBOOT: Loaded Overlay:[BB-BONE-eMMC1-01-00A0.bb.org-overlays]
UBOOT: Loaded Overlay:[BB-HDMI-TDA998x-00A0.bb.org-overlays]
kernel:[4.19.94-ti-r42]
nodejs:[v10.24.0]
/boot/uEnv.txt Settings:
uboot_overlay_options:[enable_uboot_overlays=1]
uboot_overlay_options:[uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-19-TI-00A0.dtbo]
uboot_overlay_options:[enable_uboot_cape_universal=1]
pkg check: to individually upgrade run: [sudo apt install --only-upgrade ]
pkg:[bb-cape-overlays]:[4.14.20210821.0-0buster+20210821]
pkg:[bb-wl18xx-firmware]:[1.20210520.0-0buster+20210520]
pkg:[kmod]:[26-1]
pkg:[librobotcontrol]:[1.0.5-git20200715.0-0buster+20200716]
pkg:[firmware-ti-connectivity]:[20190717-2rcnee1buster+20200305]
groups:[debian : debian adm kmem dialout cdrom floppy audio dip video plugdev users systemd-journal bluetooth netdev i2c gpio pwm eqep remoteproc admin spi iio docker tisdk weston-launch xenomai cloud9ide]
cmdline:[console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 lpj=1990656 rng_core.default_quality=100 quiet]
dmesg | grep remote
[ 76.627346] remoteproc remoteproc0: wkup_m3 is available
[ 77.045385] remoteproc remoteproc0: powering up wkup_m3
[ 77.045417] remoteproc remoteproc0: Booting fw image am335x-pm-firmware.elf, size 217168
[ 77.045702] remoteproc remoteproc0: remote processor wkup_m3 is now up
[ 79.562249] remoteproc remoteproc1: 4a334000.pru is available
[ 79.572286] remoteproc remoteproc2: 4a338000.pru is available
dmesg | grep pru
[ 79.562249] remoteproc remoteproc1: 4a334000.pru is available
[ 79.562408] pru-rproc 4a334000.pru: PRU rproc node pru@4a334000 probed successfully
[ 79.572286] remoteproc remoteproc2: 4a338000.pru is available
[ 79.572479] pru-rproc 4a338000.pru: PRU rproc node pru@4a338000 probed successfully
dmesg | grep pinctrl-single
[ 1.242316] pinctrl-single 44e10800.pinmux: 142 pins, size 568
[ 1.767089] pinctrl-single 44e10800.pinmux: pin PIN108 already requested by ocp:A15_pinmux; cannot claim for 0-0070
[ 1.777728] pinctrl-single 44e10800.pinmux: pin-108 (0-0070) status -22
[ 1.784408] pinctrl-single 44e10800.pinmux: could not request pin 108 (PIN108) from group nxp_hdmi_bonelt_pins on device pinctrl-single
dmesg | grep gpio-of-helper
[ 1.255785] gpio-of-helper ocp:cape-universal: ready
lsusb
Bus 001 Device 003: ID 041e:3233 Creative Technology, Ltd
Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
END
I expect /dev/fb0 to be present: startlxqt fails
root@beaglebone:# startlxqt
qt.qpa.screen: QXcbConnection: Could not connect to display
Could not connect to any X display.
root@beaglebone:#
Crossing out not from me.