I am currently using Debian 10 Buster with Wayland.
This problem is not existing anymore at this release.
Wayland no longer uses an extra fence register if dual monitor is used.
The wrong reservation of fence registers at intel_blit.c still exists, but does
not harm, because the limit of 14
Unfortunatelu no new flavor of Ubuntu is supporting 32 bits anymore.
Therefore I had to install Debian 10 (Buster).
Wayland at Debian is running without severe problems.
This problem also is not existing anymore, because Wyland is no longer using an
extra fence register if a dual monitor is
I did at #14 again, set verification-done-bionic for this fix, as requested.
Again it disappears.
I now tested the fix 3 times (once for cosmic and twice for bionic).
This time I did the same test as at #8.
Whatever you do it was the last time I test this bug.
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Problem could not be reproduced, because it was hidden by bug #1795774.
After installation from proposed, the problem was solved:
root@gert-laptop:/etc/apt# dpkg -s libmutter-2-0 | grep Version
Version: 3.28.3+git20190124-0ubuntu18.04.2
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Problem reproduced with old version:
gert@gert-laptop:~$ dpkg -s libmutter-2-0 | grep Version
Version: 3.28.3-2~ubuntu18.04.2
Apr 19 14:41:11 gert-laptop gnome-shell[991]: CoglError set over the top of a
previous CoglError or uninitialized memory.
Verification succeeded. Problem solved
** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic
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https://bugs.launchpad.net/bugs/1795774
Verification succeeded. Problem solved.
** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic
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https://bugs.launchpad.net/bugs/1790525
Sorry, I missed the previous request to verify at bionic.
Bionic is my basic Ubuntu.
I only use cosmic for test. At the past I installed cosmic only to verify the
wayland-patch for old Intel-graphics. This worked but I got a lot of other
problems with unstable starting of ubuntu, caused by
Created attachment 143415
libdrm_ignore_deadlock
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https://bugs.launchpad.net/bugs/1797882
Title:
At dual monitor intel_do_flush_locked failed: Resource deadlock
Created attachment 143414
fix intel_blit.c
fix error_patch2
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https://bugs.launchpad.net/bugs/1797882
Title:
At dual monitor intel_do_flush_locked failed:
Some more investigation, understanding and adding 2 other possible fixes for
the problem.
The problem occurs at Ubuntu 18.10 only at gdm3 with wayland using dual monitor.
It is not occuring with wayland at single monitor.
It totally doesnot occur if gdm3 is not using wayland.
At ubuntu 18.04 the
** Tags added: cosmic
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https://bugs.launchpad.net/bugs/1790525
Title:
gnome-shell assert failure: double free or corruption (fasttop) in
g_free() from
Reinstalled current libmutter.
With dual monitor horizontal aside this problem could not be reproduced because
logon-session crashes before showing logon-screen, (caused by bug #1790525).
Installed proposed version:
apt list libmutter-3-0
Listing... Done
libmutter-3-0/cosmic-proposed,now
** Tags removed: cosmic verification-needed-cosmic
** Tags added: verification-done-cosmic
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Title:
gnome-shell assert failure:
Reinstalled current libmutter.
With dual monitor horizontal aside this gives
Feb 1 22:26:58 Gert2 gnome-shell[1038]: Failed to allocate texture: Failed to
create texture 2d due to size/format constraints
Feb 1 22:26:58 Gert2 gnome-shell[1038]: CoglError set over the top of a
previous
Issue https://gitlab.gnome.org/GNOME/mutter/issues/453 is added to
mutter
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https://bugs.launchpad.net/bugs/1795760
Title:
Xwayland crashed with SIGABRT in OsAbort()
Because this bug no longer is marked as duplicate of #1745799, I now add
the bug-fix (tested by me for a long time) to this bug.
** Attachment added: "Patch"
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1795760/+attachment/5231631/+files/error9_patch.txt
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Mesa-bug:
https://bugs.freedesktop.org/show_bug.cgi?id=109102
** Bug watch added: freedesktop.org Bugzilla #109102
https://bugs.freedesktop.org/show_bug.cgi?id=109102
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Without solving this problem, wayland cannot be used after logon, when
using dual monitor. The sesssion stops very easy and often. Work is
lost; you have to logon again. E.g. the simple switching between 2
overlapping windows causes the end of the session.
I changed
Trace
** Attachment added: "trace at forced coredump"
https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1797882/+attachment/5223254/+files/wayland_stacktrace.txt
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** Description changed:
Using ubuntu wayland with dual monitors, configured above each other.
Dock is configured at both displays, not hiding.
Icons for "terminal" and "libreofffice Writer" are present at the dock.
Start terminal on primary screen by mouseclick on dock.
Start
Public bug reported:
Using ubuntu wayland with dual monitors, configured above each other.
Dock is configured at both displays, not hiding.
Icons for "terminal" and "libreofffice Writer" are present at the dock.
Start terminal on primary screen by mouseclick on dock.
Start libreoffice Writer on
Problem can be solved at update_fbo() within clutter/clutter/clutter-
offscreen-effect.c
In this case at update_fbo a texture should be alocated with width 2560 which
is greater than maximal size 2048 of graphics cards.
Offscreen-effect does not support sliced textures, so this is impossible
** Package changed: evince (Ubuntu) => gnome-shell (Ubuntu)
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https://bugs.launchpad.net/bugs/1795089
Title:
Gnome-shell crashes if dual monitor connected
To
Public bug reported:
THis contains a fresh install of Ubuntu 18.10 to verify the solution at bug
1727356, for Intel-graphic-cards,
which do not support OpenGL 2.1 or higher.
This solution works.
A fresh install does not contain any monitors.xml file, to describe the dual
Proposed solution:
As the stacktrace below shows the problem is caused by module
cogl_texture_new_with_size at cogl/cogl/deprecated/cogl/auto-texture.c .
This module is trying to create a texture with size 2560 x 1024, which is by
default is configured by gdm3 with wayland for 2 monitors.
This
Extra info:
1.The syslog at a crash shows next error. Probably memory management at an
errormemssage is not correct. Also look at the size 2560 x 1024
Sep 08 00:18:35 Gert2 gnome-shell[2141]: CoglError set over the top of a
previous CoglError or uninitialized memory.
*** This bug is a duplicate of bug 1727356 ***
https://bugs.launchpad.net/bugs/1727356
Daniel,
Thanks for the soon reply.
I use now lightdm with display manager gdm3 and WaylandEnable=false.
I can startup but the logon-screen is not stable if dual monitor is
used. Screens are repeatingly
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