changing screen positions (mate-control-center.displays) caused one display to become unreadable/unusable
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
mate-control-center (Ubuntu) |
New
|
Undecided
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Unassigned |
Bug Description
Ubuntu MATE live QA-test on
- hp 8200 elite sff (i5-2400, 8gb, nvidia quadro 600)
another check for
My display setup is strange (one monitor above the other), so using the Displays area of Ubuntu-MATE Control Center to adjust, I drag the location of one relative to the other to where it should be for my setup.
** Expected results
I expect the Monitor.Preferences to show show ghost-images, and clicking APPLY I expect the display orientation to adjust to the changed setup, and both displays to be readable, static & usable.
** Actual results
On dragging one relative to the other, the Monitor.Preferences image is showing a trail of where it was dragged like solitaire years ago (on another OS) when you 'won'.. Not expected
On clicking Apply
- my.top monitor is perfectly clear & usable
- the displays are orientated correctly relative to one another
- my.bottom display is now unusable/unreadable as it's a constant changing/flashing mess
Dragging windows on my.lower display now leave trails (on desktop), the flashing/changing (strobe-like) could be a problem for some health conditions possibly (seizure?), but it's very annoying (it's occurring on what I consider my primary monitor when I'm seated as I am currently).
** More detail/testing
Strange - on closing Monitor.Preferences window, and re-opening it again.. my.lower monitor stopped it's flashing/changing images & became fully readable & usable.
Adjusting the screen.location in Control.
ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: mate-control-center 1.26.0-0ubuntu1
ProcVersionSign
Uname: Linux 5.13.0-16-generic x86_64
NonfreeKernelMo
ApportVersion: 2.20.11-0ubuntu69
Architecture: amd64
CasperMD5CheckR
CasperVersion: 1.465
CurrentDesktop: MATE
Date: Thu Sep 23 02:44:52 2021
LiveMediaBuild: Ubuntu-MATE 21.10 "Impish Indri" - Beta amd64 (20210922)
ProcEnviron:
TERM=xterm-
PATH=(custom, no user)
XDG_RUNTIME_
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: mate-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
You'll note the lower display has a mess of windows..
What the picture does not show is that the whole screen is flashing/strobe like; it appears a messy-clear image on the picture; but the image is not actually static but flashing...
I've since further tested & adjusted display position again (when the flashing stopped) so I can't describe what it was like that well; but it was very irritating & made it difficult to concentrate even on the one display that was perfectly normal
FYI: I'm still convinced I've experienced this before; but I can't find bug reports on it, and these actual screens are shared with other boxes; so I maybe thinking of the hp dc7700 (another box that uses same screens/ keyboard/ mouse etc)