First thing backup all the configs with another linux computer. Then you can try to chroot the sd card on the other linux computer and run passwd as root.

Still working through things, but FYI I was able to get 6.18 going on Ubuntu with some small effort. GPU needs work but still beats CPU, NPU looks great.

I installed ambian in this tv box to run klipper for my 3d printer, but its been a years since I last used it and I totally forgot what was the user I created. I really didn't want to wipe the SD card because of my 3d printer's config files etc. Is there anything I can do to retrieve the user and password? Thanks.

Always read everything ... (sorry) : make service-install (instead of make) will solve error and compile display-service (what I wanted)

root@homeassistant:/usr/src/tm16xx-display# make make EXTRA_CFLAGS="-DCONFIG_TM16XX -DCONFIG_TM16XX_KEYPAD -DCONFIG_TM16XX_I2C -DCONFIG_TM16XX_SPI -include /usr/src/tm16xx-display/drivers/auxdisplay/tm16xx_compat.h -I/usr/src/tm16xx-display/include/" -C /lib/modules/6.12.58-current-rockchip64/build M=/usr/src/tm16xx-display/drivers/auxdisplay CONFIG_TM16XX=m CONFIG_TM16XX_KEYPAD=y CONFIG_TM16XX_I2C=m CONFIG_TM16XX_SPI=m CONFIG_LINEDISP=m modules make[1]: Entering directory '/usr/src/linux-headers-6.12.58-current-rockchip64' CC [M] /usr/src/tm16xx-display/drivers/auxdisplay/line-display.o CC [M] /usr/src/tm16xx-display/drivers/auxdisplay/tm16xx_core.o CC [M] /usr/src/tm16xx-display/drivers/auxdisplay/tm16xx_keypad.o LD [M] /usr/src/tm16xx-display/drivers/auxdisplay/tm16xx.o CC [M] /usr/src/tm16xx-display/drivers/auxdisplay/tm16xx_i2c.o CC [M] /usr/src/tm16xx-display/drivers/auxdisplay/tm16xx_spi.o MODPOST /usr/src/tm16xx-display/drivers/auxdisplay/Module.symvers CC [M] /usr/src/tm16xx-display/drivers/auxdisplay/line-display.mod.o In file included from /usr/src/tm16xx-display/drivers/auxdisplay/line-display.mod.c:2: /usr/src/tm16xx-display/drivers/auxdisplay/line-display.mod.c:13:41: error: expected ‘)’ before ‘LINEDISP’ 13 | KSYMTAB_FUNC(linedisp_attach, "_gpl", ""LINEDISP"");