On Mon, Jul 20, 2020, 8:48 PM Bruce Kilpatrick <[email protected]> wrote:

> On 7/20/20 6:47 PM, Bill Barry wrote:
> > On Mon, Jul 20, 2020, 8:42 PM Bruce Kilpatrick <[email protected]> wrote:
> >
> >> On 7/20/20 6:23 PM, Nat Taylor wrote:
> >>> Boot into safe mode or single user mode, so you get a command prompt.
> >> Then
> >>> you could try checking your dmesg / syslog etc, and maybe uninstalling
> >> any
> >>> nvidia drivers?
> >>>
> >>> On Mon, Jul 20, 2020 at 8:05 AM Bruce <[email protected]> wrote:
> >>>
> >>>>
> >>>> On 7/20/20 12:00 AM, John Jason Jordan wrote:
> >>>>> On Sun, 19 Jul 2020 21:22:49 -0700
> >>>>> Bruce <[email protected]> dijo:
> >>>>>
> >>>>>> My Google searches turn up lots of problems with Nvidia.  This
> laptop
> >>>>>> has onboard Intel drivers.
> >>>>>>
> >>>>>> Can anybody point me in the proper direction?
> >>>>> The command lshw -c video will tell you which chip it is trying to
> use.
> >>>>> There are lots of problems with the nouveau driver, especially with
> >>>>> older Nvidia chips.
> >>>>> _______________________________________________
> >>>>> PLUG mailing list
> >>>>> [email protected]
> >>>>> http://lists.pdxlinux.org/mailman/listinfo/plug
> >>>>
> >>>> This laptop is running an Intel chipset.  The driver is i915.
> >>>>
> >>>> It's strange that things work during boot showing the Ubuntu logo then
> >>>> just stops around the time the desktop should appear
> >>>>
> >>>> _______________________________________________
> >>>> PLUG mailing list
> >>>> [email protected]
> >>>> http://lists.pdxlinux.org/mailman/listinfo/plug
> >>>>
> >>> _______________________________________________
> >>> PLUG mailing list
> >>> [email protected]
> >>> http://lists.pdxlinux.org/mailman/listinfo/plug
> >>>
> >> I have perused the lists as I can boot and run without the HDMI cable.
> >> Nothing stood out.  I'll have to peek at it in a bit to see if it has
> >> any Nvidia drivers. The laptop is all Intel chipset, but it's worth a
> look
> >>
> >
> >
> > Well does it work if you boot without the HDMI cable, then plug it in
> after
> > it boots?
> >
> > Bill
> >
> >> _______________________________________________
> >> PLUG mailing list
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> >> http://lists.pdxlinux.org/mailman/listinfo/plug
> >>
> > _______________________________________________
> > PLUG mailing list
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> > http://lists.pdxlinux.org/mailman/listinfo/plug
> >
> That sends the screen on the laptop to a blank (possibly flashing) and
> the TV saying it has no incoming signal
>


Looks like the same bug being reported here.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1871721
They are attributing it to problems with Nvidia drivers as you would, but
it might be a more general problem. I don't see any  solution in the
thread, but a few had luck just turning the power on and off on the
external monitor.

Bill

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