System hangs out/freezes on external monitor after last update

you should use timeshift, very usefull …
in the logs there was some logs referring to bbswitch, and i think 6 coredumps of plasmashell…
post output from:
pacman -Qm
pacman -Qs 'optimus|bbswitch|bumblebee'

sorry for delay (I’ve been under power cut due to russian fascists fire attacks to our critical infrastructure)
I’ve installed timeshift (though current snapshots are “erroneous”)

$ pacman -Qm
abr2gbr 1.0.2-1
advancecomp 2.1-3
audio-recorder 3.3.4-1
crow-translate 2.9.1-1
cryptoplugin 1.2.2-2
deadbeef 1.8.8-3
djvu2pdf 0.9.2-1
electron12 12.2.3-4
etcher 1.7.9-1
exaile 4.1.1-2
extundelete 0.2.4-5
fotoxx 22.30-1
glib 1.2.10-18
google-chrome 105.0.5195.125-1
jdk 19.0.1-1
jdk8 8u251-1
jre 19.0.1-1
kde-servicemenus-rootactions 2.9.1-1
key-mapper-git 1.0.0+62+g3e20cb9-1
libcanberra-gstreamer 0.30+2+gc0620e4-3
libdbusmenu-qt4 0.9.3+16.04.20160218-2
libguess 1.2-4
masterpdfeditor-free 4.3.89-1
metis 5.1.0.p10-2
noto-fonts-compat 20151217-1
ocrmypdf 13.2.0-1
openssl-1.0 1.0.2.u-1
package-query 1.12-1
pdf-xchange 9.2.359.0-1
pdfsam 4.2.10-1
playonlinux 4.3.4-4
python-coloredlogs 15.0.1-2
python2 2.7.18-5
qpdfview 0.4.18-2
qt4 4.8.7-34
qt5-canvas3d 5.12.4-1
qt5-webkit 5.212.0alpha4-18
sky 2.1.7801-1
sni-qt 0.2.7+17.04.20170112-1
teamviewer 15.25.5-1
trimage 1.0.6-2
ttf-wps-fonts 1.0-5
tuxguitar 1.5.4-2
tuxguitar-common 1.5.4-1
tuxguitar-fluidsynth 1.2.20-1
wkhtmltopdf 0.12.6-1
wps-office-extension-russian-dictionary 20131121-4
wps-office-extension-ukrainian-dictionary 20131121-4
wps-office-fonts 1.0-2
xdg-su 1.2.3-2
xf86-input-keyboard 1.9.0-3
xf86-input-mouse 1.9.3-1
yaourt 1.9-1
zoom 5.9.1-1

And no output for pacman -Qs 'optimus|bbswitch|bumblebee'.

Thanks, I’ve already tried downgrade kscreen and libkscreen to 5.25.1 - it did not help.
As for downgrading to plasma LTS 5.25: I’m not sure if that could effect newly installed kde applications that rely on the latest version.

not sure if optimus is better than nvidia-prime overall.

nothing suspicious in the pacman -Qm output…
you had something in the logs regarding bbswitch…
switching completely to nvidia could be worth a try… use envycontrol:
pamac build envycontrol
when done, switch to nvidia:
sudo envycontrol -s nvidia
it will prompt you for reboot, so do it, and see if that helps…

Doesn’t it eliminate the role of Intel graphics card as the one that freeing up the Nvidia card from full load?

The confrontational “activity” between current nvidia-prime and envycontrol is excluded?

well yes, you will be 100% on nvidia …
but this is only for testing purposes…
and what activity? dont understand what you mean

I mean: could nvidia-prime somehow conflict with envycontrol (when both installed) in managing hybrid configuration?

no it doesnt conflict, i have also intel+nvidia prime, and use envycontrol, and no issues …

Building envycontrol...
==> Making package: envycontrol 2.1.1-1 (вт, 27-гру-2022 23:19:43 +0200)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving sources...
  -> Updating envycontrol git repo...
==> Validating source files with sha256sums...
    envycontrol ... Skipped
==> Removing existing $srcdir/ directory...
==> Extracting sources...
  -> Creating working copy of envycontrol git repo...
Cloning into 'envycontrol'...
Switched to a new branch 'makepkg'
==> Removing existing $pkgdir/ directory...
==> Entering fakeroot environment...
==> Starting package()...
Traceback (most recent call last):
  File "/var/tmp/pamac-build-roman/envycontrol/src/envycontrol/", line 2, in <module>
    from setuptools import setup
  File "/usr/lib/python3.10/site-packages/setuptools/", line 247, in <module>
  File "/usr/lib/python3.10/site-packages/setuptools/", line 97, in patch_all
  File "/usr/lib/python3.10/site-packages/setuptools/", line 134, in patch_for_msvc_specialized_compiler
    msvc = import_module('setuptools.msvc')
  File "/usr/lib/python3.10/importlib/", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/usr/lib/python3.10/site-packages/setuptools/", line 24, in <module>
    from packaging.version import LegacyVersion
ImportError: cannot import name 'LegacyVersion' from 'packaging.version' (/usr/lib/python3.10/site-packages/packaging/
==> ERROR: A failure occurred in package().

(packaging and setuptools are installed in latest versions)

no errors reported on aur site … can you try build some other package from aur, for example fastfetch:
pamac build fastfetch
to see if it works

I’ve launched pamac install jdk today (as timeshift dependency) successfully.

==> Creating package "fastfetch"...
  -> Generating .PKGINFO file...
  -> Generating .BUILDINFO file...
  -> Generating .MTREE file...
  -> Compressing package...
==> Leaving fakeroot environment.
==> Finished making: fastfetch 1.7.5-1 (вт, 27-гру-2022 23:46:11 +0200)
==> Cleaning up...

Checking keyring...                                                                                            [1/1]
Checking integrity...                                                                                          [1/1]
Loading packages files...                                                                                      [1/1]
Checking file conflicts...                                                                                     [1/1]
Checking available disk space...                                                                               [1/1]
Installing fastfetch (1.7.5-1)...                                                                              [1/1]
Transaction successfully finished.

all right, so theres something wrong with envycontrol…
so install optimus manager, it resets the graphics configs, so maybe it will help:
sudo pacman -S optimus-manager
dont install any dependecies like acpi call, bbswitch, only optimus…
then do this:
edit the file kate /etc/sddm.conf and simply put a # before the line starting with DisplayCommand and the one starting with DisplayStopCommand - you may not have these lines there…
reboot… if it didnt helped, try switching to nvidia:

1 Like

Ok, that seems working to get superficially expected behavior.
But, optimus-manager --switch hybrid still extremely lags/slows down the system.

so switching to nvidia works and you have no issue with the monitor?
what are the results when you switch to integrated?

it outputs on laptop display only (as it should, I guess).
But in each mode there’s a strange bug: when focusing on some icon in taskbar and closing the underlying app - the taskbar disappears (sliding down effect) and after a second - slides up again, sometimes reporting “kioslave5 crach” in report window.
I’m on optimus-manager --switch nvidia mode now.

well at least the monitor works on nvidia …
and did you had the taskbar issue before installing optimus?

actually, yes

could be caused with nvidia drivers, or related to plasma… just have to wait untill next stable update, and hoping its fixed… or maybe switch to testing branch

in my situation
downgrade kscreen libkscreen help me.

try diferent version to find more stable combination kscreen and libkscreen

I Use:
video-hybrid-intel-nvidia-prime last stable version
nvidia-utils 525.60.11-2
kscreen and libkscreen to 5.25.1<=
KDE Plasma 5.26.4
KDE FW 5.101.0
QT 5.15.7
Kernel 5.15.85-1 Manjaro

I can say all my system have stable last update

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