1 |
On Mon, Nov 8, 2021 at 1:31 PM Laurence Perkins <lperkins@×××××××.net> wrote: |
2 |
> |
3 |
> |
4 |
> |
5 |
> > -----Original Message----- |
6 |
> > From: Mark Knecht <markknecht@×××××.com> |
7 |
> > Sent: Monday, November 8, 2021 11:48 AM |
8 |
> > To: Gentoo User <gentoo-user@l.g.o> |
9 |
> > Subject: Re: [gentoo-user] Virtual Desktop with a Virtual Monitor? |
10 |
> > |
11 |
> > On Mon, Nov 8, 2021 at 12:23 PM Andreas Stiasny <gentoo@××××××××××××××××××.at> wrote: |
12 |
> > > |
13 |
> > > On 08.11.21 17:34, Mark Knecht wrote: |
14 |
> > > > In the case where the monitor is detached at boot two modules are |
15 |
> > > > not loaded - fuse & nvmem_rmem. Other than that the module list |
16 |
> > > > appears identical. |
17 |
> > > > |
18 |
> > > |
19 |
> > > At the moment I can't help you to solve this in software but there may |
20 |
> > > be a hardware solution. There are fake monitor plugs. This is just a |
21 |
> > > plug without a cable that makes the device think that there is a |
22 |
> > > monitor attached even if there isn't. Search for "HDMI dummy plug" or similar. |
23 |
> > > |
24 |
> > > |
25 |
> > > Andreas |
26 |
> > > |
27 |
> > |
28 |
> > Actually, if it works and I have little doubt it does, that's a great solution for my needs. I see Amazon has 1920x1080 plugs but also has virtual 4K plugs. All under $10. |
29 |
> > |
30 |
> > Thanks! |
31 |
> > |
32 |
> > Mark |
33 |
> > |
34 |
> |
35 |
> So, I don't use the PI variants with GUI or even with a monitor very often, but as I recall if the HDMI port isn't attached at boot it then disables it to save the video memory. |
36 |
> |
37 |
> If you then try to use one of the VNC servers that's designed to share the running X session, you'll find that there isn't a running X session. |
38 |
> |
39 |
> But what you should still be able to do is install the "vncserver" command to fire up an X server that isn't attached to the physical output, only the VNC. |
40 |
> You may need to configure it to also start your preferred display manager, etc depending on whether or not the distro you're running does that automatically for you. |
41 |
> |
42 |
> If you want to be able to plug in a monitor later though you'll probably need one of the dummy plugs to prevent the output from being switched off and ignored. |
43 |
> |
44 |
> LMP |
45 |
|
46 |
So I don't yet know how they do it but I purchased a copy of a product called |
47 |
StellarMate OS yesterday. |
48 |
|
49 |
https://stellarmate.com/ |
50 |
|
51 |
It's a Pi variant that is set up to control |
52 |
astrophotography equipment. It's able to run headless and has a web server |
53 |
that I can access from Chrome on my main Linux box. |
54 |
|
55 |
https://drive.google.com/file/d/1I6QYXay6rTy_-CDFQpsQBaSaiyOjNFDJ/view?usp=sharing |
56 |
|
57 |
Screen resolution drops from 1920x1080 with the monitor attached to |
58 |
1600x900 headless, |
59 |
but other than that it appears to work fine. Interestingly the taskbar |
60 |
across the top isn't |
61 |
accessible, at least yet, but I can run anything I have an icon on the desktop. |
62 |
|
63 |
I'll be studying how they do this (although I think the headless |
64 |
monitor plug is probably the |
65 |
easiest solution) so if someone (Wol?) wants to work offline, get in touch. |
66 |
|
67 |
Cheers, |
68 |
Mark |