I already tried that, it V4.1.5 worked with both Ubuntu 18.04 and 20.04. I
put in an earlier comment about this.

On Wed, Jul 8, 2020 at 10:40 AM Kai-Heng Feng <email address hidden>
wrote:

> Can you please test kernel v4.15, which is used by 18.04:
> https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15.18/
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1882442
>
> Title:
>   Upgrade from 18.04 to 20.04 deactivates internal monitor in display
>   manager
>
> Status in linux package in Ubuntu:
>   Incomplete
> Status in linux package in Fedora:
>   Unknown
>
> Bug description:
>   output of lsb_release -rd:
>   Description:  Ubuntu 20.04 LTS
>   Release:      20.04
>
>   I recently upgraded from 18.04 to 20.04 and was using MATE. When the
> upgrade was run my external
>   HDMI monitor was plugged in, after the update, when I reboot, the
> internal monitor shows the beginning of the boot process (I deactivated
> 'silent splash' by editing grub.cfg) then it switches to the HDMI monitor
> and the internal monitor goes dark. I can also get the tty consoles on the
> external monitor but not on the internal monitor.
>
>   In MATE it was a real problem because the panel is apparently still on
>   the invisible part of the desktop; I used a tty to install gnome, then
>   I could get the display settings by right-clicking on the desktop, and
>   setting the monitors to mirror, so I can reach applications, etc.
>
>   Computer is a Dell Inspiron 3275 AIO with touch screen and Intel
> on-board video, I think.
>   I had no problems with Ubuntu 18.04 with MATE.
>
>   The problem seems to be similar to this bug:
>   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1874194
>   but sort of the reverse, in that the internal monitor is the problem.
>
>   Thank you for your help.
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 20.04
>   Package: linux-image-5.4.0-33-generic 5.4.0-33.37
>   ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34
>   Uname: Linux 5.4.0-33-generic x86_64
>   ApportVersion: 2.20.11-0ubuntu27.2
>   Architecture: amd64
>   AudioDevicesInUse:
>    USER        PID ACCESS COMMAND
>    /dev/snd/controlC2:  david      2012 F.... pulseaudio
>    /dev/snd/controlC1:  david      2012 F.... pulseaudio
>    /dev/snd/controlC0:  david      2012 F.... pulseaudio
>   CasperMD5CheckResult: skip
>   CurrentDesktop: ubuntu:GNOME
>   Date: Sun Jun  7 11:43:37 2020
>   HibernationDevice: RESUME=UUID=3b1a8a2e-1937-4785-b4bb-49f9a251b292
>   InstallationDate: Installed on 2020-03-07 (91 days ago)
>   InstallationMedia: Ubuntu-MATE 16.04.1 LTS "Xenial Xerus" - Release
> amd64 (20160719)
>   MachineType: Dell Inc. Inspiron 3275 AIO
>   ProcFB: 0 amdgpudrmfb
>   ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-33-generic
> root=UUID=95b8de7f-9de3-4cea-b947-e135a738948c ro
>   RelatedPackageVersions:
>    linux-restricted-modules-5.4.0-33-generic N/A
>    linux-backports-modules-5.4.0-33-generic  N/A
>    linux-firmware                            1.187
>   SourcePackage: linux
>   UpgradeStatus: Upgraded to focal on 2020-06-06 (1 days ago)
>   dmi.bios.date: 03/15/2019
>   dmi.bios.vendor: Dell Inc.
>   dmi.bios.version: 1.7.0
>   dmi.board.name: 04NJ6P
>   dmi.board.vendor: Dell Inc.
>   dmi.board.version: A02
>   dmi.chassis.type: 13
>   dmi.chassis.vendor: Dell Inc.
>   dmi.chassis.version: 00
>   dmi.modalias:
> dmi:bvnDellInc.:bvr1.7.0:bd03/15/2019:svnDellInc.:pnInspiron3275AIO:pvr1.7.0:rvnDellInc.:rn04NJ6P:rvrA02:cvnDellInc.:ct13:cvr00:
>   dmi.product.family: Inspiron
>   dmi.product.name: Inspiron 3275 AIO
>   dmi.product.sku: 0855
>   dmi.product.version: 1.7.0
>   dmi.sys.vendor: Dell Inc.
>
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