@Giorgi, Would you please try drm-tip and collect some log for me ? thanks #Download the amd64 1. https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/current/amd64/linux-headers-5.12.0-051200rc8drmtip20210430-generic_5.12.0-051200rc8drmtip20210430.202104300202_amd64.deb 2. https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/current/amd64/linux-headers-5.12.0-051200rc8drmtip20210430_5.12.0-051200rc8drmtip20210430.202104300202_all.deb 3. https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/current/amd64/linux-image-unsigned-5.12.0-051200rc8drmtip20210430-generic_5.12.0-051200rc8drmtip20210430.202104300202_amd64.deb 4. https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/current/amd64/linux-modules-5.12.0-051200rc8drmtip20210430-generic_5.12.0-051200rc8drmtip20210430.202104300202_amd64.deb Ref. https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/current/
And enable drm.debug=0x10e in grub. Then collect dmesg after issue is reproduced. thanks -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1922334 Title: External monitor does not wake up on Titan Ridge laptops when docked (9500, TB16) To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1922334/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs