Running Pharo in KDE suspends desktop effects

[mydoghasworms]

Bug description When running Pharo in KDE desktop, e.g. on Kubuntu, the desktop effects are suspended, affecting things like wobbly windows, desktop grid, etc.

Closing the application restores desktop effects.

I have tested this by installing both Pharo 8 and Pharo 9 (both 64 bit) using the Pharo launcher, as well as installing Pharo 9 using the shell script. Launching Pharo 9 in either case causes desktop effects to be suspended. Pharo 8 does not do this.

To Reproduce Install Pharo 9 on Linux/KDE, either with the shell script or Pharo Launcher.

Expected behavior There should be no change to the desktop behaviour.

Version information:

• OS: Kubuntu, 64 bit
• Version: 21.04
• Pharo Version: 9

Expected development cost I can help test the bug fix.

Additional context I am running on a Dell Precision M6800 that has an Nvidia Quadro K3100M and an i7-4910MQ.

[mydoghasworms]

As a further test, I switched drivers.

I was using "NVIDIA driver metapackage from nvidia-driver-390 (proprietary, test)" and switched to using "X.org X server -- Nouveau display driver from xserver-xorg-video-nouveau (open source)" in Software Sources.

After this change, Pharo 9 did not start at all anymore, giving the following output on the console:

libGL error: No matching fbConfigs or visuals found
libGL error: failed to load driver: swrast
X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  155 (GLX)
  Minor opcode of failed request:  3 (X_GLXCreateContext)
  Value in failed request:  0x0
  Serial number of failed request:  124
  Current serial number in output stream:  125

Pharo 8 still works, as before, after the change.

[mydoghasworms]

Not sure whether restarting helped, since switching drivers, but Pharo 9 does start now, although the original problem persists.

[mauricioszabo]

Happens on my end too (Ubuntu 22.04, NVidia 535 drivers)

[Ducasse]

Thanks for the feedback. Now Pharo 9 is super old and this is not a version currently maintained. We could have a look but it is only in the context of a contract. So let us know if this is something that interest you else we will just close this issue.

[mauricioszabo]

Oh, I wasn't aware of that. So, let me tell what I did (today - right now):

1. Went to https://pharo.org/download
2. Clicked on Gnu/Linux. It asked me to download PharoLauncher-linux-3.0.1-x64.zip
3. Downloaded it, unzipped
4. Entered the pharo-launcher directory, then ran ./pharo-launcher
5. Same problem (desktop effects are disabled)

Also - the window's scaling is quite weird, as you can see in this screenshot below:

Sorry, I didn't look that this issue referred only to Pharo 9. I meant to say that the problem still occurs on the Pharo Launcher 3.0.1 that I can download from the site.

[MarcusDenker]

What is strange is the PhLImageDetailPresenter listed in the error log. This class does not exist in Pharo12

Are you sure that you do not load something somehow on startup?

[mauricioszabo]

I literally just ran the launcher, didn't do anything else.

[mydoghasworms]

Thanks @mauricioszabo for confirming this in the new Pharo version; I have updated the title as the problem is obviously not specific to one version of Pharo. @Ducasse FYA

[astares]

Launcher is not based on Pharo12 yet.

Could you please check with Pharo 12 following https://get.pharo.org

curl https://get.pharo.org/64/120+vm | bash
pharo-ui Pharo.image

Pharo Zeroconf Script