*** This bug is a duplicate of bug 1934752 ***
https://bugs.launchpad.net/bugs/1934752
** This bug has been marked a duplicate of bug 1934752
ubuntu mate - change monitor.preferences and 2 displays became 4/6/...
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** Tags added: jammy
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https://bugs.launchpad.net/bugs/1944661
Title:
changing screen positions (mate-control-center.displays) caused one
display to become unreadable/unusable
To
Dear Chris, could you please collect all the info from this bug and post
new issue at upstream - https://github.com/mate-desktop/mate-control-
center/issues .
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experiencing this today with Ubuntu MATE jammy daily
- hp 8200 elite sff (i5-2400, 8gb, nvidia quadro 600)
(note the real effect of the screenshot is far worse in real life; on
movement of the mouse the image on the bottom display changes & it's
mostly white-flashes; esp. the trails left by the
another picture...
if the terminal window visible on the 'lower' screen is maximized; the
wrong-background gets covered & flashing effect is gone.. if the
terminal is dragged around, it leaves trails (which is why some can be
seen as it was opened on the top screen & dragged to the bottom for
just another screenshot on d780.
the bottom-right of the portrait-left display (my right.display but was
default-left on boot) or the area that is BELOW the other screen is
where it's flashing (stopped awhile back now; when I clicked the
SHOW.DESKTOP type button in error thinking it was a menu)
This bug has been reported on the Ubuntu ISO testing tracker.
A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1944661
** Tags added: iso-testing
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On this machine - the flashing appears to be only at the bottom of
my.right (the portrait-left tilted display).. ie. the section that is
below the other display.
effect is it's less annoying than the prior box (which was the whole
background strobe-like flashing).
I've now adjusted the display a
Another QA-test on different hardware
- dell [optiplex] 780 (c2q-q9400, 8gb, amd/ati cedar radeon hd
5000/6000/7350/8350)
the moment I adjusted screens... same behavior as hp.8200; TRAILS appear
in the Monitor.Preferences window, and flashing.background on one
display. this box has very
Nothing really new in this picture to the last.
it's identical to prior uploaded.photo except I adjusted the bottom
monitor to be slightly-left (askew) of the top display (thus the black
borders shown in the picture).
EXCEPT for the TRAILS in the Monitor.Preferences window
no issue here at all.
/var/crash/ is empty
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https://bugs.launchpad.net/bugs/1944661
Title:
changing screen positions (mate-control-center.displays) caused one
display to become unreadable/unusable
To
at this time I've re-opened the Control.Centre.Displays option (top
display), and altered the relative position of each other..
Please NOTICE the SHADOW/TRAILS of the movement I made of the 'green' or
originally 'right' monitor which was dragged to be below the left one.
Also NOTICE all trails
another pic..
the top screens with terminal is perfectly calm & useable.
bottom screen (where window trails exist) is flashing/strobe-like
It's mostly the background that strobes; the windows themselves are
somewhat usable/readable - caja is shown here and were it not for the
flashing of
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
** Attachment added: "journalctl.txt"
https://bugs.launchpad.net/ubuntu/+source/mate-control-center/+bug/1944661/+attachment/5527157/+files/journalctl.txt
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