raspberrypi 7" DSI display stopped working after initial upgrade (Ubuntu 21.10 64bit)

kosmos-ac

3/21/23, 5:14 AM

I installed the Ubuntu Desktop 21.10 64bit image (released 2021-10-14) on USB for my RaspberryPi 4Gb. The pi has an original 7" display connected via the display interface (dsi).

After adding dtoverlay=vc4-kms-dsi-7inch (and lcd_rotate=2 to invert the display) to config.txt on system-boot the initial boot and setup seemed to work like a charm.

Problems started after the automatic update that happens during the setup process. After reboot the display would just go black during the boot sequence. I am not an expert but I think this happens when it switches from text to framebuffer mode (when it would usually show the ubuntu logo + the spinning circle).

The system does not crash, in the background everything seems to be starting up just fine including Xorg. If the pi is being started up with HDMI connected everything works as expected, just the 7inch display won't work.

(Probably unrelated but just to be complete: After the first reboot, and figuring out that I could successfully boot with HDMI, I noticed some weird crashes of gnome-shell being reported. These went away when I ran a manual apt update && apt dist-upgrade.)

I ran through the logs but so far I was not able to get any idea what might be wrong. Thanks in advance for any help you can offer, I'll be happy to share whatever info might be helpful.

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raspberrypi

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: raspberrypi 7" DSI display stopped working after initial upgrade (Ubuntu 21.10 64bit)

TH: raspberrypi 7" จอแสดงผล DSI หยุดทำงานหลังจากอัปเกรดครั้งแรก (Ubuntu 21.10 64 บิต)

RO: Ecranul raspberrypi 7" DSI a încetat să funcționeze după actualizarea inițială (Ubuntu 21.10 64 de biți)

RU: 7-дюймовый дисплей raspberrypi DSI перестал работать после первоначального обновления (Ubuntu 21.10 64bit)

VI: Màn hình DSI raspberrypi 7" ngừng hoạt động sau khi nâng cấp lần đầu (Ubuntu 21.10 64bit)

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