@satmandu can you post the contents of your config.txt and cmdline.txt?
** Also affects: linux-raspi (Ubuntu Impish) Importance: High Assignee: Juerg Haefliger (juergh) Status: New -- 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/1944397 Title: hdmi broken on 5.13.0-1007-raspi Status in linux-raspi package in Ubuntu: New Status in linux-raspi source package in Impish: New Bug description: Have a HDMI display w/o audio hooked up to this RPI4B. With the latest kernel update the screen does not turn on due to this. ProblemType: Bug DistroRelease: Ubuntu 21.10 Package: linux-image-5.13.0-1007-raspi 5.13.0-1007.8 ProcVersionSignature: Ubuntu 5.13.0-1007.8-raspi 5.13.13 Uname: Linux 5.13.0-1007-raspi aarch64 ApportVersion: 2.20.11-0ubuntu69 Architecture: arm64 CasperMD5CheckResult: unknown Date: Mon Sep 20 20:56:14 2021 ImageMediaBuild: 20210421 ProcEnviron: SHELL=/bin/bash LANG=en_US.UTF-8 TERM=vt100 XDG_RUNTIME_DIR=<set> PATH=(custom, user) SourcePackage: linux-raspi UpgradeStatus: Upgraded to impish on 2021-08-17 (34 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1944397/+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