05-24-2021, 03:50 PM
Those gray vertical bars are the result of the bootsplash patches that Manjaro ARM applies to the Linux kernel source. When it comes to the PineBook Pro's framebuffer, something isn't exactly right with those patches. If you disable the bootsplash feature on your PineBook Pro, by removing the bootsplash parameter from the kernel command line in /boot/extlinux/extlinux.conf, the issue with the gray bars goes away.