Installed hirsute desktop image, upgraded all packages and confirmed the problem:
$ uname -a Linux rpi-4b-rev1d4-d9f5 5.11.0-1019-raspi #20-Ubuntu SMP PREEMPT Tue Sep 21 15:23:42 UTC 2021 aarch64 aarch64 aarch64 GNU/Linux $ dmesg | grep -P 'firmware|WARN' [ 0.116402] raspberrypi-firmware soc:firmware: Attached to firmware from 2021-02-25T12:10:40, variant start [ 0.120417] raspberrypi-firmware soc:firmware: Firmware hash is 564e5f9b852b23a330b1764bcf0b2d022a20afd0 [ 94.323547] raspberrypi-firmware soc:firmware: Request 0x00030066 returned status 0x80000001 [ 94.332200] vc4-drm gpu: [drm] Couldn't stop firmware display driver: -22 [ 94.352626] WARNING: CPU: 3 PID: 1171 at drivers/gpu/drm/vc4/vc4_hdmi_regs.h:417 vc4_hdmi_read+0xd8/0x140 [vc4] [ 94.708647] WARNING: CPU: 3 PID: 1171 at drivers/gpu/drm/vc4/vc4_hdmi_regs.h:445 vc4_hdmi_cec_init+0x3ac/0x540 [vc4] [ 95.061054] WARNING: CPU: 1 PID: 1171 at drivers/gpu/drm/vc4/vc4_hdmi_regs.h:417 vc4_hdmi_read+0xd8/0x140 [vc4] [ 95.416872] WARNING: CPU: 1 PID: 1171 at drivers/gpu/drm/vc4/vc4_hdmi_regs.h:445 vc4_hdmi_cec_init+0x398/0x540 [vc4] [ 95.768827] WARNING: CPU: 0 PID: 323 at drivers/gpu/drm/vc4/vc4_hdmi_regs.h:417 vc4_hdmi_read+0xd8/0x140 [vc4] [ 96.088013] WARNING: CPU: 0 PID: 323 at drivers/gpu/drm/vc4/vc4_hdmi_regs.h:445 vc4_cec_irq_handler_tx_bare+0xf8/0x140 [vc4] Installed kernel from proposed and verified that the issue is fixed and the display comes up: $ apt-add-repository -p proposed $ apt install linux-raspi $ reboot <snip> $ uname -a Linux rpi-4b-rev1d4-d9f5 5.11.0-1021-raspi #22-Ubuntu SMP PREEMPT Wed Oct 6 17:30:38 UTC 2021 aarch64 aarch64 aarch64 GNU/Linux $ dmesg | grep -P 'firmware|WARN' $ sudo dmesg | grep -P 'firmware|WARN' [ 0.120342] raspberrypi-firmware soc:firmware: Attached to firmware from 2021-02-25T12:10:40, variant start [ 0.124357] raspberrypi-firmware soc:firmware: Firmware hash is 564e5f9b852b23a330b1764bcf0b2d022a20afd0 ** Tags removed: verification-needed-hirsute ** Tags added: verification-done-hirsute -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1944397 Title: HDMI does not display anything with Impish RPi desktop image To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware-raspi2/+bug/1944397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
