[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
I will have to read up on this, and I am in a situation where I have to rely on this as my only computer for a while. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
Would it be possible for you to do a kernel bisection? First, find the last -rc kernel works and the first -rc kernel doesn’t work from http://kernel.ubuntu.com/~kernel-ppa/mainline/ Then, $ sudo apt build-dep linux $ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git $ cd linux $ git bisect start $ git bisect good $(the working version you found) $ git bisect bad $(the non-working version found) $ make localmodconfig $ make -j`nproc` deb-pkg Install the newly built kernel, then reboot with it. If it still have the same issue, $ git bisect bad Otherwise, $ git bisect good Repeat to "make -j`nproc` deb-pkg" until you find the offending commit. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
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 <1882...@bugs.launchpad.net> 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: >USERPID 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-firmware1.187 > 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. > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
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 a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
Yes, it worked on 18.04. The problem came with the upgrade to 20.04. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
Thanks for testing. Did it work on 18.04? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
The above did not work. I edited grub to remove the amdgpu.dc=0 from the command line, ran update-grub and rebooted. Essentially the same behavior as before. I did notice some 'Tell Plymouth to write out...(something) in the boot messages, but otherwise very similar. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
I got the files for the kernel and did this (many warnings, one error): (base) david:new-kernel$ sudo dpkg -i *.deb Selecting previously unselected package linux-headers-5.8.0-050800. (Reading database ... 454198 files and directories currently installed.) Preparing to unpack linux-headers-5.8.0-050800_5.8.0-050800.202007052030_all.deb ... Unpacking linux-headers-5.8.0-050800 (5.8.0-050800.202007052030) ... Preparing to unpack linux-headers-5.8.0-050800-generic_5.8.0-050800.202007052030_amd64.deb ... Unpacking linux-headers-5.8.0-050800-generic (5.8.0-050800.202007052030) over (5.8.0-050800.202007052030) ... Preparing to unpack linux-image-unsigned-5.8.0-050800-generic_5.8.0-050800.202007052030_amd64.deb ... Unpacking linux-image-unsigned-5.8.0-050800-generic (5.8.0-050800.202007052030) over (5.8.0-050800.202007052030) ... Selecting previously unselected package linux-modules-5.8.0-050800-generic. Preparing to unpack linux-modules-5.8.0-050800-generic_5.8.0-050800.202007052030_amd64.deb ... Unpacking linux-modules-5.8.0-050800-generic (5.8.0-050800.202007052030) ... Setting up linux-headers-5.8.0-050800 (5.8.0-050800.202007052030) ... Setting up linux-headers-5.8.0-050800-generic (5.8.0-050800.202007052030) ... Setting up linux-modules-5.8.0-050800-generic (5.8.0-050800.202007052030) ... Setting up linux-image-unsigned-5.8.0-050800-generic (5.8.0-050800.202007052030) ... Processing triggers for linux-image-unsigned-5.8.0-050800-generic (5.8.0-050800.202007052030) ... /etc/kernel/postinst.d/initramfs-tools: update-initramfs: Generating /boot/initrd.img-5.8.0-050800-generic modinfo: ERROR: could not get modinfo from 'da903x': No such file or directory W: Possible missing firmware /lib/firmware/amdgpu/navi12_gpu_info.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/arcturus_gpu_info.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/arcturus_ta.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/arcturus_asd.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/arcturus_sos.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi12_ta.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi12_asd.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi12_sos.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi14_ta.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/vega20_ta.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/arcturus_rlc.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/arcturus_mec2.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/arcturus_mec.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi12_rlc.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi12_mec2.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi12_mec.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi12_me.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi12_pfp.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi12_ce.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/arcturus_sdma.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi12_sdma1.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi12_sdma.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi10_mes.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi12_vcn.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/arcturus_vcn.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi12_smc.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/arcturus_smc.bin for module amdgpu W: Possible missing firmware /lib/firmware/amdgpu/navi12_dmcu.bin for module amdgpu /etc/kernel/postinst.d/zz-update-grub: Sourcing file `/etc/default/grub' Sourcing file `/etc/default/grub.d/init-select.cfg' Generating grub configuration file ... Found linux image: /boot/vmlinuz-5.8.0-050800-generic Found initrd image: /boot/initrd.img-5.8.0-050800-generic Found linux image: /boot/vmlinuz-5.4.0-40-generic Found initrd image: /boot/initrd.img-5.4.0-40-generic Found linux image: /boot/vmlinuz-5.4.0-39-generic Found initrd image: /boot/initrd.img-5.4.0-39-generic Found linux image: /boot/vmlinuz-4.15.0-101-generic Found initrd image: /boot/initrd.img-4.15.0-101-generic Adding boot menu entry for UEFI Firmware Settings done I will edit grub.cfg and try this. Just saving here before I do. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal
[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
Please test latest mainline kernel without "amdgpu.dc=0": https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.8-rc4/ ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
I found a similar Fedora bug report, it is a kernel issue, and there is a workaround. See: https://bugzilla.redhat.com/show_bug.cgi?id=1594488 Need to add 'amdgpu.dc=0' to the kernel command line in grub.cfg: GRUB_CMDLINE_LINUX="amdgpu.dc=0" then run grub-update reboot after booting to a version 5 kernel, video on both monitors works, and a check of the proc cmdline shows: $ cat /proc/cmdline BOOT_IMAGE=/boot/vmlinuz-5.4.0-40-generic root=UUID=95b8de7f-9de3-4cea-b947-e135a738948c ro amdgpu.dc=0 ** Bug watch added: Red Hat Bugzilla #1594488 https://bugzilla.redhat.com/show_bug.cgi?id=1594488 ** Also affects: linux (Fedora) via https://bugzilla.redhat.com/show_bug.cgi?id=1594488 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
PARTIAL FIX: downgrade the kernel. I can confirm that everything seems to return to normal if you use GRUB2 to select Linux 4.15.0-101-generic as the kernel. I edited /etc/default/grub to - give a boot menu with a reasonable timeout - use the last selected kernel as default ** Description changed: 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 the external monitor. + 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: + 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: - USERPID ACCESS COMMAND - /dev/snd/controlC2: david 2012 F pulseaudio - /dev/snd/controlC1: david 2012 F pulseaudio - /dev/snd/controlC0: david 2012 F pulseaudio + USERPID 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-firmware1.187 + linux-restricted-modules-5.4.0-33-generic N/A + linux-backports-modules-5.4.0-33-generic N/A + linux-firmware1.187 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. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
This seems to be a kernel issue: when I switched back to kernel 4.15 in GRUB2, the problems seems to go away. Checking on it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
I left the machine on a while, and the internal monitor came on while I was gone for about an hour. ??? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
If the external HDMI is plugged in at power-on, a login window will show up on the HDMI, and then I can choose gnome or gnome classic for the session, log in, then right-click on the desktop, set the displays to mirror, and get to the main panels or activities menu. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
If I shutdown and unplug the external HDMI monitor, then power on, the internal display only shows the initial UEFI message, the screen appears grey, then it goes dark. If I then plug in the HDMI (not changing the power state) I can get a tty with ctrl-alt-f1, login, and run startx. MATE then appears, but only the non-panel part of the display. Also the monitor arrangement is flipped, but I think that is a minor MATE problem I noticed in 18.04 after a cli startx. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager
I also went in the dconf editor and changed some settings for laptop lid behavior to 'nothing", since the display settings show the internal monitor as a laptop monitor. No effect. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882442 Title: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
