Comment 14 for bug 1860483

I tried "Ubuntu on Wayland". Crash. Logged in. Screen loaded improperly
and keyboard and mouse froze; handlers blocked and who knows what else.
The screen didn't have the red artifact though; it had a cluster of
diagonal black and white scan lines covering about the middle third of
the screen, an incomplete population of the left hand tool bar icons I
use and none of the desktop icons. The top tool bar seemed complete, but
was non-functional.

Tried "Unity" while I was at it, and that was a complete flop
post-log-in. Blank screen, except for an oversized audio slider icon at
the top right and the cursor arrow, and the cursor was frozen; once
again, no handlers.

On 1/22/20 8:40 AM, Paul Collinsworth wrote:
> I encountered an issue after advising you that 18.04.3 works. Perhaps
> it sheds some light on the problem.
>
> It occurred to me that perhaps there is a graphics issue and that part
> of what I was seeing is contamination of the background image I was
> using. So I tried to open "Settings" in order to revert to the default
> image. Didn't work; that is, "Settings" doesn't work. No response. I
> can click on "Settings" on either toolbar or try to access it through
> "Show Applications" and no response.
>
> What's more, after getting no response there, other stuff is locked
> out and doesn't respond. I have to reboot to get functionality back.
> In getting to reboot, the shutdown process does report that anything
> I've tried to open or start, after trying to reach "Settings", isn't
> responding, and then it hangs. If I click on "Power down" again at
> that point, it doesn't, it just puts up an image and stalls (the image
> it displays is the background image I've been using, without the
> toolbars and the contaminant artifact!). At that point, I've just hit
> the power switch.
>
> I've not tried "Ubuntu on Wayland" or the test kernel package. I'll
> see what happens there. I can boot into the prior Linux generic via
> grub; haven't tried to pull up any apps there, but the image issue was
> still there.
>
>
>
> On 1/22/20 12:43 AM, Daniel van Vugt wrote:
>> OK, thanks. Assuming the bug isn't just hiding and wouldn't reappear
>> later in 18.04.3 if used long enough, then this implies a fix exists
>> somewhere in the HWE packages (which are the difference between 18.04
>> fully updated and 18.04.3 fully updated).
>>
>> The only two sets of HWE packages I can think of that affect graphics
>> are Xorg and the kernel.
>>
>> Firstly Xorg: Does the bug occur if you log into "Ubuntu on Wayland"
>> instead?
>>
>> Secondly the kernel: Does the bug occur if you install the latest test
>> kernel packages from here?https://kernel.ubuntu.com/~kernel-
>> ppa/mainline/v5.5-rc7/ Remember to run 'uname -a' to check which kernel
>> is active.
>>
>