Re: gdm on a virtual machine commit (sysv)

"Joe Locash" ([email protected] via blfs-dev Mailing List) <[email protected]>
Newsgroups gmane.linux.lfs.beyond.devel
Message-ID <[email protected]>
On 5/9/25 12:34 PM, Pierre Labastie ([email protected] via 
blfs-dev Mailing List) wrote:
> Le mercredi 07 mai 2025 à 18:18 -0400, Joe Locash a écrit :
>> I'm some what confused by the recent commit for this.
>>
>>       gdm: on a virtual machine, prevent using X11 on sysv
>>
>>       The file /usr/lib/udev/rules.d/61-gdm.rules disables wayland
>>       for virtual GPUs. The problem is that X11 has a permission
>> problem
>>       on sysv with user gdm, so wayland is mandatory. Describe
>>       what to do in "configuration information". This is the same
>>       problem as for nvidia GPUs...
>>
>> I don't see a permission problem and I'm able to start both wayland
>> and
>> xorg session with gdm in qemu?
>>
>> The books states:
>>    "However, on sysv, a permission problem prevents running X11 for
>> user
>> gdm , so running on wayland is mandatory. If your system is sysv on a
>> virtual machine or you have an NVIDIA GPU and still want to try
>> running
>> Wayland sessions anyway, execute the following command as the root
>> user:"
>>
>> This just doesn't make sense.  If running on wayland is mandatory on
>> a
>> sysv build why would there need to be a change to run on wayland?
>>
>> Tested in qemu-9.2.2.
> Well, gdm can run on X11 or wayland, and can launch a session on X11 or
> Wayland. The problem I see (and I'd like to have some confirmation) is
> that gdm _running_ on X11 cannot start... Once started (on wayland for
> me) it can launch a session on any system.

Thanks for the clarification. I did not know you were trying starting 
gdm on Xorg.  I can confirm the issue but the commit does not fix it 
when running in qemu.

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