try to run apport-collect 1841139, however "amixer -c1 info" hang, kill it with -9 won't work.
Taipei office have access to the machine. ** Changed in: linux (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1841139 Title: monitor hotplug not working as external d-sub or display port connect amd gpu and internal lcd connect to intel gpu. Status in OEM Priority Project: Confirmed Status in linux package in Ubuntu: New Bug description: Platform: dell 5420 / 5424 with AMD GPU. D-SUB or display port hot plug won't work in bionic with bionic kernel oem 4.15 -1048 and oem-osp1 5.0 -1016. It can be work around with amdgpu.runpm=0 kernel parameter, with the price of higher power consumption. As install bios 89.7.48 + Kernel: 4.15.0-1043-oem + amdgpu: amdgpu-pro-19.10-793418 The hotplug works. However, no DP audio (unless boot with DP plugged). To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1841139/+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