Software > Operating Systems and Porting

Debian 10 vs CentOS 7 (both as VM under Fedora 32 KVM)

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pocock:
Even as a desktop user, there is always a display server in your system

It is really useful to find out, for example, if it is X or Wayland:

You can run this command in Fedora and each VM:

$ echo $XDG_SESSION_TYPE

You can get more information in each system by looking at the output of

$ xdpyinfo

In the Debian system, you can look at this file and search for errors:

/var/log/Xorg.0.log

Any line with WW is a warning and EE is an error

Here is an example error from that file:

[    98.019] (EE) Failed to load module "glx" (loader failed, 0)

The more details you share from that file, the easier it is to help you.

I suspect the problem you have is not a problem with the ppc64el architecture, it could be something related to X or Wayland and you might want to ask in the Debian IRC channels to see if anybody can help troubleshoot.

cchinicz:
Hi,

echo $XDG_SESSION_TYPE
On host (Fedora): tty
On Debian VM: wayland
On Centos: x11

The file /var/log/Xorg.0.log did not exist on the Debian VM (I've tried vi /var/log/Xorg.0.log and it opened a new file).

Thanks

pocock:

That tells me that Debian is using Wayland.  You can disable Wayland in Debian so that it uses Xorg, like the Centos host.  There are lots of pages with information about how to do that

https://duckduckgo.com/?q=debian+disable+wayland

Please give feedback if this solves the problem for you, it is most likely a Wayland problem and not a PPC problem.

cchinicz:
Hi,

I've tried to edit /etc/gdm3/daemon.conf to uncomment #WaylandEnable=flalse but my Debian is not allowing me to add my user to sudoers. On CentOS I added my users to sudoers logging as root but on Debian I could not find how to add my user to sudoers neither how to login in as root or open a terminal as root.

I've tried reinstalling Debian but ended up with the same issue.

Any idea of how to circumvent this limitation?

Thanks

pocock:

Are you able to access the Debian VM through a text console, for example, by starting at a different run level or using the CTRL-ALT-F3 keystroke in the VM?

If that doesn't work, I would suggest asking for help through the Debian IRC channels, somebody can help you with that step-by-step

https://wiki.debian.org/IRC

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