[Solved] A bug with multiple screens?

[86ul]

Hello,

Since a few weeks I have three screens, a '24 HD on the left, and 2x 32' WQHD in the middle and right. And have set them as follows:

210131 - Display manager.png

Normally I see this:

210131 - Screen shot.jpg

But when switching between the open apps with "Coverflow (3D)" I see this:
I use Coverflow that is already installed on Cinnamon (Start > Windows > Alt+Tab > Alt-Tab switcher Style > Coverflow 3D

210131 - Screen shot - Coverflow.jpg

Is this a low priority bug, or have I set my settings a bot wrong?

Solution: Do not use Coverflow 3D, but Compiz for example...

[SMG]

What happened a few weeks ago on your system that might be a factor in this change?

Please give us information about your install by entering this command in a terminal: inxi -Fxxxrz
Click </> from the mini toolbar above the textbox where you type your reply and then place your cursor between the code markers and paste the results of the command between the code markers [code]Results[/code]. This will let us know how Mint sees your hardware.

[86ul]

Sorry for this delay. I forgot about this... Trying to recreate this, because I did a clean install to get 20.1

EDIT: Windows > Alt-Tab > Coverflow 3D and multiple programs open, did the trick. Same results, this time with LibreOffice and Zotero open, and trying to switch with Alt+Tab. I have a print screen of it, but now I have some troubles with GIMP, with unmet dependencies. Food for another thread...

What happened a few weeks ago on your system that might be a factor in this change?

Because I get the very same results on another install, without messing around, I think it is a bug in the Coverflow3D program with multiple monitors. But here it goes:

Code: Select all

System:    Kernel: 5.4.0-67-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 Desktop: Cinnamon 4.8.6 
           wm: muffin 4.8.1 dm: LightDM 1.30.0 Distro: Linux Mint 20.1 Ulyssa 
           base: Ubuntu 20.04 focal 
Machine:   Type: Desktop System: Gigabyte product: X570 AORUS PRO v: -CF serial: <filter> 
           Mobo: Gigabyte model: X570 AORUS PRO v: x.x serial: <filter> UEFI: American Megatrends 
           v: F32 date: 01/18/2021 
CPU:       Topology: 8-Core model: AMD Ryzen 7 3700X bits: 64 type: MT MCP arch: Zen 
           L2 cache: 4096 KiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 114983 
           Speed: 4114 MHz min/max: 2200/3600 MHz boost: enabled Core speeds (MHz): 1: 4111 2: 4111 
           3: 4109 4: 4109 5: 4105 6: 4105 7: 4092 8: 2590 9: 4111 10: 4113 11: 4104 12: 4111 
           13: 4107 14: 2555 15: 4109 16: 4109 
Graphics:  Device-1: AMD Navi 14 [Radeon RX 5500/5500M / Pro 5500M] vendor: Gigabyte driver: amdgpu 
           v: kernel bus ID: 0a:00.0 chip ID: 1002:7340 
           Display: x11 server: X.Org 1.20.9 driver: amdgpu,ati 
           unloaded: fbdev,modesetting,radeon,vesa 
           resolution: 3440x1440~75Hz, 3440x1440~75Hz, 1920x1080~60Hz 
           OpenGL: renderer: Radeon RX 5500 XT (NAVI14 DRM 3.35.0 5.4.0-67-generic LLVM 11.0.0) 
           v: 4.6 Mesa 20.2.6 direct render: Yes  
Repos:     No active apt repos in: /etc/apt/sources.list 
           Active apt repos in: /etc/apt/sources.list.d/additional-repositories.list 
           1: deb https://repo.vivaldi.com/archive/deb/ stable main
           Active apt repos in: /etc/apt/sources.list.d/devolo-updates.list 
           1: deb http://update.devolo.com/linux/apt/ stable main
           Active apt repos in: /etc/apt/sources.list.d/dimitris-kalamaras-ppa-focal.list 
           1: deb http://ppa.launchpad.net/dimitris-kalamaras/ppa/ubuntu focal main
           Active apt repos in: /etc/apt/sources.list.d/libreoffice-ppa-focal.list 
           1: deb http://ppa.launchpad.net/libreoffice/ppa/ubuntu focal main
           Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list 
           1: deb http://packages.linuxmint.com ulyssa main upstream import backport #id:linuxmint_main
           2: deb http://archive.ubuntu.com/ubuntu focal main restricted universe multiverse
           3: deb http://archive.ubuntu.com/ubuntu focal-updates main restricted universe multiverse
           4: deb http://archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse
           5: deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
           6: deb http://archive.canonical.com/ubuntu/ focal partner
           Active apt repos in: /etc/apt/sources.list.d/openshot_developers-ppa-focal.list 
           1: deb http://ppa.launchpad.net/openshot.developers/ppa/ubuntu focal main
           Active apt repos in: /etc/apt/sources.list.d/otto-kesselgulasch-gimp-focal.list 
           1: deb http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu focal main
           Active apt repos in: /etc/apt/sources.list.d/pkgcrosswire-ppa-focal.list 
           1: deb http://ppa.launchpad.net/pkgcrosswire/ppa/ubuntu focal main
           Active apt repos in: /etc/apt/sources.list.d/riot-im.list 
           1: deb [signed-by=/usr/share/keyrings/riot-im-archive-keyring.gpg] https://packages.riot.im/debian/ default main
           Active apt repos in: /etc/apt/sources.list.d/signal-xenial.list 
           1: deb [arch=amd64] https://updates.signal.org/desktop/apt xenial main
           Active apt repos in: /etc/apt/sources.list.d/smathot-cogscinl-focal.list 
           1: deb http://ppa.launchpad.net/smathot/cogscinl/ubuntu focal main
           Active apt repos in: /etc/apt/sources.list.d/spotify.list 
           1: deb http://repository.spotify.com stable non-free
           Active apt repos in: /etc/apt/sources.list.d/team-xbmc-ppa-focal.list 
           1: deb http://ppa.launchpad.net/team-xbmc/ppa/ubuntu focal main
           Active apt repos in: /etc/apt/sources.list.d/thomas-schiex-blender-focal.list 
           1: deb http://ppa.launchpad.net/thomas-schiex/blender/ubuntu focal main
           Active apt repos in: /etc/apt/sources.list.d/ubuntu-mozilla-security-ppa-focal.list 
           1: deb http://ppa.launchpad.net/ubuntu-mozilla-security/ppa/ubuntu focal main
           Active apt repos in: /etc/apt/sources.list.d/ubuntuhandbook1-audacity-focal.list 
           1: deb http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu focal main
           No active apt repos in: /etc/apt/sources.list.d/ubuntuhandbook1-gimp-focal.list 
           Active apt repos in: /etc/apt/sources.list.d/vivaldi.list 
           1: deb http://repo.vivaldi.com/stable/deb/ stable main
           Active apt repos in: /etc/apt/sources.list.d/zotero.list 
           1: deb https://github.com/retorquere/zotero-deb/releases/download/apt-get/ ./
Info:      Processes: 436 Uptime: 1h 21m Memory: 31.37 GiB used: 24.04 GiB (76.6%) Init: systemd 
           v: 245 runlevel: 5 Compilers: gcc: 9.3.0 alt: 9 Shell: bash v: 5.0.17 
           running in: gnome-terminal inxi: 3.0.38 

BTW, In case you have noticed the high use of my CPU and RAM, I have Boinc running on the back ground...

[SMG]

EDIT: Windows > Alt-Tab > Coverflow 3D and multiple programs open, did the trick. Same results, this time with LibreOffice and Zotero open, and trying to switch with Alt+Tab.

I tried searching for the product and all I found that seems to fit what you have described is this link Cover Flow. I notice in the description "For Linux it is possible to switch between different programs in cover-flow style using the composition and window manager Compiz or KDE's KWin (Cover-Switch version 4.1 or higher).". If that is correct, then possibly because Cinnamon uses the windows manager muffin, there may be enough differences in the windows managers that it is causing the output you are seeing. There is no option to change windows managers in Cinnamon.

System:
Kernel: 5.4.0-67-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 Desktop: Cinnamon 4.8.6
wm: muffin 4.8.1 dm: LightDM 1.30.0 Distro: Linux Mint 20.1 Ulyssa
base: Ubuntu 20.04 focal

I realize I may be completely wrong in the app you are using. If you would provide a link to how you obtained it, I will take a look and see if there is anything in the product compared to your system specs which might be causing the issue. Perhaps there might be some settings in Coverflow which can be set to make sure it takes advantage of the graphics drivers your system has.

[86ul]

Thanks again for your quick reply. This time, I haven't forgot you.

On Cover Flow, I have not installed anything to do this. All I did was going to Start menu > Windows > Alt-Tab > Coverflow, thus a possible setting that comes with Cinnamon itself. For the record I am using Mint 20.1 Cinnamon edition.

Thus, if the Coverflow in Cinnamon is the very same as Cover Flow you have referred to...

If that is correct, then possibly because Cinnamon uses the windows manager muffin, there may be enough differences in the windows managers that it is causing the output you are seeing. There is no option to change windows managers in Cinnamon.

Have I therefore found a bug in Cinnamon?

[Moonstone Man]

Have I therefore found a bug in Cinnamon?

No. You have an incompatibility, and it's Cover Flow's problem.

[86ul]

Thus to inform Cover Flow is the right thing to do? On my way in a few hours...

[Moonstone Man]

Thus to inform Cover Flow is the right thing to do? On my way in a few hours...

Probably not because I doubt they'll be interested. As SMG told you, "For Linux it is possible to switch between different programs in cover-flow style using the composition and window manager Compiz or KDE's KWin".

Both of those are old technology. I doubt the developers will care that their application doesn't work with other window managers. Still, there's no harm in trying.

[86ul]

I am familiar with Compiz, see my thread on PbP. Thus thanks, I will get familiar with it sooner than I thought.

[SMG]

Thus to inform Cover Flow is the right thing to do? On my way in a few hours...

CoverFlow 3D is offered as a setting in Cinnamon, so I would think it would fall into the category of a Cinnamon bug. However, now I'm puzzled as to why it is offered in Cinnamon if the prior information I found indicates it only works with those couple windows managers.

I searched on Coverflow on the Cinnamon Issues page for open and closed issues and there is a list of items, so I would guess that is where you would want to report it.

[Moonstone Man]

Thus to inform Cover Flow is the right thing to do? On my way in a few hours...

CoverFlow 3D is offered as a setting in Cinnamon, so I would think it would fall into the category of a Cinnamon bug.

Goodness me. My apologies to the OP. I went looking for it but couldn't find it in my 20.1.

Thanks for the correction.

[SMG]

I went looking for it but couldn't find it in my 20.1.

It's one of the Alt -Tab Switcher styles. I didn't realize that yesterday and didn't find it either. That's why I went searching for it. I found it this morning when I kept find more webpages saying it was a part of Mint Cinnamon.

I learn so much about my own install by helping others.

[Moonstone Man]

I learn so much about my own install by helping others.

I've learned an awful lot about Linux in general, especially Debian-based Linux, the same way. What I haven't learned yet is how to not be a naughty boy sometimes

[86ul]

If I may speak for all newbies, you are welcome...

But ontopic, Coverflow 3D does not work with multiple screens on Cinnamon it seems. After creating yet another issue on GitHub, I will get comfort with Compiz.

I searched on Coverflow on the Cinnamon Issues page for open and closed issues and there is a list of items, so I would guess that is where you would want to report it.

Done, see #9993

[JosephM]

Saw the bug report this morning. Just for general info, the coverflow option has been built into Cinnamon pretty much from the beginning. The problem with troubleshooting this particular but is very few people have a monitor setup quite like that to duplicate it. And sometimes that's what it takes to figure out what's going on and fix it

[SMG]

Thanks for the info, JosephM.

The confusing part to me was the initial description of the option:
Windows > Alt-Tab > Coverflow 3D

instead of the actual:
Windows > Atl-Tab > Alt-tab switcher style > Coverflow 3D

[JosephM]

I think it dates all the way back before Cinnamon. When we still had MGSE. For those that don't know it was gnome shell with mint extensions.

[86ul]

Sounds interesting, that MGSE stuff.

Although the problem with Coverflow is not solved, the issue itself is solved by not using Coverflow...

Thus thanks...

[86ul]

Just for those looking for a solution with multiple screens, this thread reads promisable: viewtopic.php?t=339779
But this subforum too: viewforum.php?f=212

[86ul]

Just noticed that I have exactly the same results with Timeline (3D).

Thus Start menu > Windows > Alt-Tab > Alt-Tab switcher style > Coverflow 3D OR Timeline 3D results in the exactly the same bug...

More a Mint, than a Coverflow (3D)/Timeline (3D) bug?

Just for those looking for a solution with multiple screens, this thread reads promisable: viewtopic.php?t=339779
But this subforum too: viewforum.php?f=212

Compiz does not work with Cinnamon.