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TigerVNC / tigervnc

High performance, multi-platform VNC client and server
https://tigervnc.org
GNU General Public License v2.0
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Fractional scaling does not work in VNC remote desktop #1848

Closed Heng-Zhou closed 1 month ago

Heng-Zhou commented 1 month ago

Describe the bug In VNC remote desktop, if I set scaling to a fractional scale (say 125%), the resulting scale is always an integer scale (say 200%). Fractional scaling works fine if l operate locally, so I consider it a bug of tigervnc and request a fix.

To Reproduce Steps to reproduce the behavior:

  1. Start VNC remote desktop according to directions in tigervnc's official HOWTO document (so I did not do anything special). Connect it to show the Ubuntu desktop.
  2. Display Settings -> Enable 'Fractional Scaling' -> Select a non-integer scale, say 125% -> Apply.

Expected behavior Can change to the specified fractional scale in VNC remote desktop as when I operate locally.

Screenshots image

Client (please complete the following information):

Server (please complete the following information):

Additional context Contents of /etc/tigervnc/vncserver-config-defaults:

session=ubuntu geometry=3840x2160 localhost=false alwaysshared=true

The fractional scaling works fine if l operate locally. The problem only occurs in VNC remote desktop. Also, the same problem occurs in previous versions of tigervnc like 1.13.0 on Ubuntu 22.04. So the issue has nothing to do with new OS or GNOME and I consider it a long-hidden bug of tigervnc and thus request a fix.

CendioOssman commented 1 month ago

I'm afraid that's a limitation in GNOME, not TigerVNC. They don't allow fractional scaling on X11 for some reason. There seems to be some suggestion for workaround here:

https://wiki.archlinux.org/title/HiDPI#Xorg

Please report the issue to GNOME as only they can resolve this.

Heng-Zhou commented 1 month ago

@CendioOssman: Disagree. I have said clearly that there is no such a problem when I set fraction scale locally. If GNOME does not allow fractional scaling on X11, then I should not be able to do that both locally and remotely on the same machine. How do you explain I can set fraction scale locally on the same GNOME desktop? The only reasonable explanation is that the bug is in tigervnc, not in GNOME or something else. So, don't push your duty to somewhere else.

CendioOssman commented 1 month ago

You are likely using Wayland locally. If I start GNOME with X11 locally here, I can only choose integer scale factors. You can also find numerous links about this is for local sessions, so it is not a TigerVNC specific issue.

Heng-Zhou commented 1 month ago

@CendioOssman: Disagree. I have double checked that I am using X11, not Wayland. Below is the screenshot. The information of Windowing System remains the same both locally or remotely -- X11. I can choose fractional scale without problem if I operate locally. The second screenshot below shows that I have successfully applied 125% fractional scale. Again, it's a bug of tigervnc. Don't push your duty to somewhere else; that's rude, unprofessional and cowardly.

The screenshot below shows that I am using X11, not Wayland: image

The screenshot below shows that I can successfully set fractional scale locally: image

bphinz commented 1 month ago

Don't push your duty to somewhere else; that's rude, unprofessional and cowardly.

"Duty"?? You have a grave misunderstanding of how open source software development works. And you lecturing anyone else on being rude is rich to say the least. Please don't reply or file any further bug tickets.

Heng-Zhou commented 1 month ago

@bphinz: Maybe I don't understand open source, but it is obvious that you and some other people in this thread don't understand what "shame" is for a software developer. Leave a bug for so long and refuse to admit it even if it is spot out, not to mention fix it. On the contrary, you avert to condemn the user. Shame on you!

PS: As for open-source, I just left a comment in another thread which was also rudely closed: https://github.com/TigerVNC/tigervnc/issues/1162#issuecomment-2412907834. That is the true and correct understanding of open-source. Instead of someone being so fond of close, I'm open to argue.