** Patch added: "0001-UBUNT-SAUCE-arm64-dtbs-Add-symbols-when-compiling-dt.patch" https://bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1782121/+attachment/5164457/+files/0001-UBUNT-SAUCE-arm64-dtbs-Add-symbols-when-compiling-dt.patch
** Description changed: Impact: Overlay dtb files should be applied to the main board dtb, before it's being passed down to the kernel for boot - but this didn't happen in the arm64 variant of the bionic/raspi2 kernel. /boot/firmware/config.txt: ... dtoverlay=pitft35-resistive - /boot/firmware/cmdline.txt: dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait fbcon=map:10 fbcon=font:VGA8x8 But the attached second display is never initialized. Fix: The main dtb must be built with symbols, to let overlay files find which section to patch - the applied patch does exactly that. Apply, build, install and reboot: dmesg: ... - [ 5.144664] fbtft: module is from the staging directory, the quality is unknown, you have been warned. - [ 5.145814] fbtft: module verification failed: signature and/or required key missing - tainting kernel [ 5.157547] fb_hx8357d: module is from the staging directory, the quality is unknown, you have been warned. [ 5.158349] fbtft_of_value: buswidth = 8 [ 5.158362] fbtft_of_value: debug = 0 [ 5.158366] fbtft_of_value: rotate = 90 [ 5.158372] fbtft_of_value: fps = 25 - ubuntu@raspi64:~$ ls -la /dev/fb1 + ubuntu@raspi64:~$ ls -la /dev/fb1 crw-rw---- 1 root video 29, 1 Jan 28 15:58 /dev/fb1 - Regression risk: We only change how the arm64 raspi2 dtbs are generated, and since we didn't produce any image using this kernel so far, the regression risk is zero. --- -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782121 Title: arm64: overlays don't get applied To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1782121/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
