** Package changed: software-properties (Ubuntu) => linux-raspi (Ubuntu)
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-raspi in Ubuntu. https://bugs.launchpad.net/bugs/2064370 Title: Blank screen after boot in raspberry pi 4 Status in linux-raspi package in Ubuntu: New Bug description: I just flashed noble arm64+raspi image and booted it in my raspberry pi 4, and after initial rainbow screen kernel boots with 4 raspberries on the top and boot text appears as normal. But then, before it finishes booting, the screen goes blank. Image is ubuntu-24.04-preinstalled-server-arm64+raspi.img.xz downloaded at Apr/30. ubuntu@ubuntu:~$ uname -a Linux ubuntu 6.8.0-1004-raspi #4-Ubuntu SMP PREEMPT_DYNAMIC Sat Apr 20 02:29:55 UTC 2024 aarch64 aarch64 aarch64 GNU/Linux I know the system booted because I can access it over the network and I even plugged a usb-serial adapter in the uart GPIOs and from there I can see the boot does progress to completion and offers me a prompt where I can use the system normally. But the HDMI screen stays blank. The funny thing is that I have been trying daily builds for quite some time now and they used to work well, this is the first one that does this (the official release). After testing some config options I found that if I change "dtoverlay=vc4-kms-v3d" for "dtoverlay=vc4-fkms-v3d" in config.txt then it boots ok and the screen stays on (note the change from kms to fkms). I also tried appending ",cma-128" to that line (it is present on other lines -- like for pi3 and pi0 -- but not on this one), it does not help. I don't think the issue is with my monitor since it works well for a long time. Also I checked EDIDs, they are detected when using fkms but they are blank when using kms: With KMS: ubuntu@ubuntu:~$ edid-decode /sys/class/drm/card0-HDMI-A-1/edid EDID of '/sys/class/drm/card0-HDMI-A-1/edid' was empty. With fKMS: ubuntu@ubuntu:~$ edid-decode /sys/class/drm/card0-HDMI-A-1/edid edid-decode (hex): 00 ff ff ff ff ff ff 00 49 f7 00 00 00 00 00 00 01 1a 01 03 80 00 00 00 0a d7 a5 a2 59 4a 96 24 ...... (supressed) I do not use a graphical environment on this unit so I don't know the consequences of this change (to me it just fixes the issue, but I guess it was there for a reason). Let me know if you need any other information from the environment. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/2064370/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
