can vnc resolution be scaled/zoomed if too large?

[m.ardito]

Hi, I dont' know how and if I can do this.
I have a kvm server which I use at work with the desktop set to a 1600x1200 resolution which fits well my computer display at work.
But if I need to connect with another pc (eg: through a vpn from elsewhere) I could have a smaller computer display, like 1024x768, and login could be difficult because the opened browser window is 1600x1200.
Currently display is "default". Would other choice help in this respect?

I believe that vnc cannot adapt the remote resolution dynamically like rdp (on windows) or spice, but is there any way to make at least the VM "scale/zoom" the offered resolution through vnc/java to better fit in my current computer display?
Since the used pc could not support spice or rdp, I would prefer a more compatible solution. Would novnc help in this respect? This server is still on 3.1 btw.

Marco

 

[wolfgang]

hi,
have you tryed xrandr on the guest?

 

[m.ardito]

I didn't know what it was, but from what I see now, it seems an X/wayland client option?
Assuming that, I guess this could be set on a linux client (Mac?).
On windows, Ultravnc (which I use mostly) gives a zoom option... that works and helps in this case, it is probably something similar?.

But I can't guess how can I use this xrandr with the vnc/java that pve offers through browser, which is what I use now because it works on any client without installing anything (as I said before I don't know anything about novnc and if it has a "zoom" option) ?

afaik the browser vnc/console pve offers as "java console" is a vnc client by itself, so probably THAT client should use what you suggested? maybe using a different urs or an optional server parameter?

Marco

 

[wolfgang]

when I have to resize my screen and logged in with vnc or novnc it dosent mater on witch client. I resize the screen on VM side.
Windows and Mac on the windows manager and Linux with xrandr.
AFIK some VNC clients must reconnect to applied this changes.

 

[m.ardito]

what if you can't even log in, just because the original vm-inside resolution is too high that you can't even see the prompt?
think 1920x1080 on a 800x600 or 1024x768 client (something like this just happened to me).

ususally vnc clients can zoom the stramed video at connect time (like I said ultravnc works like that).
thay can also changhe color depth, used bandwith, enable view only, and so many other settings, negotiating options during conection.

I don't know about novnc, but for sure java/vnc could gain from similar options offered, at least maybe the zoom factor, because that could be blocking you to even log in.

Marco

 

[giner]

Hi Marco,

I've checked noVNC demo and found scaling possible however it seems to be not implemented in Proxmox so far.

Best regards,
Stanislav

 

[m.ardito]

I've checked noVNC demo and found scaling possible however it seems to be not implemented in Proxmox so far

ok thanks. maybe also CTRL+/- works as usually does in web browsers (firefox at least) to zoom in /out the page, with novnc.

Marco

 

[sigxcpu]

I think keys are passed through to the VM.
What works (I feel your pain, I have a MacBook Air 11") is to do Zoom Out from browsers's menu.