[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-07-13 Thread David W Craig
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

[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-07-08 Thread Kai-Heng Feng
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

Re: [Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-07-08 Thread David W Craig
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/ma

[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-07-08 Thread Kai-Heng Feng
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

[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-07-08 Thread David W Craig
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

[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-07-07 Thread Kai-Heng Feng
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 notif

[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-07-07 Thread David W Craig
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 n

[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-07-07 Thread David W Craig
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-

[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-07-07 Thread Kai-Heng Feng
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. ht

[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-07-06 Thread David W Craig
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 versio

[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-06-07 Thread David W Craig
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 cha

[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-06-07 Thread David W Craig
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 fro

[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-06-07 Thread David W Craig
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 deac

[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-06-07 Thread David W Craig
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 noti

[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-06-07 Thread David W Craig
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 appea

[Bug 1882442] Re: Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

2020-06-07 Thread David W Craig
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. htt