Xpra: Ticket #882: DPI problem with Ubuntu 14.04

Since upgrading my client to 0.15.0, there is something wrong with the DPI settings when I am at work and using an external monitor attached to my laptop. It results in fonts so small as to be unreadable. (The problem does not occur when I do not have an external monitor attached to my laptop. I also had not found any problems with any of the 0.14.* clients.)

The client is 0.15.0 running on Ubuntu 14.04 with KDE.

The server is 0.15.0 running on Ubuntu 14.04.

If I start the client with "xpra attach --dpi=96 ..." then everything is fine.

Tue, 02 Jun 2015 14:44:17 GMT - Doug Doole: attachment set

attachment set to TinyFonts.zip

Bug Report tool output.

Tue, 02 Jun 2015 14:44:42 GMT - Doug Doole: attachment set

attachment set to client.log

Client side log

Tue, 02 Jun 2015 14:45:08 GMT - Doug Doole: attachment set

attachment set to server.log

Server side log

Tue, 02 Jun 2015 17:55:24 GMT - Antoine Martin: status, summary changed

status changed from new to assigned
summary changed from Tiny Fonts with 0.15.0 to DPI problem with Ubuntu 14.04

As per this post, the problem is not specific to 0.15

Tue, 02 Jun 2015 18:55:46 GMT - Timothy Basanov:

Have the same problem, client switch --dpi=96 or --dpi=72 fixes the problem. When --dpi=200 is used fonts in gnome menus are huge.

Server restart is not required to fix a problem. Java applications are not affected.

Server: ubuntu 14.04 Client: Mac OS X + 30" 2500x1600

Sun, 05 Jul 2015 08:37:34 GMT - psycho_zs:

I can confirm this on Debian testing with xpra 0.15.2+dfsg-2.

I have 96dpi on client and 96dpi set as default on xpra server. But when I connect, I get some pretty weird values:

DPI set to 45 x 25 (wanted 96 x 96)

client --dpi switch help, but default behavior seems weirdly bugged.

Sun, 05 Jul 2015 08:55:40 GMT - Antoine Martin: priority changed

priority changed from major to minor

AFAIK, this only occurs if you use an unpatched dummy driver, in which case it's always wrong - you just notice it less.

Tue, 01 Sep 2015 08:58:20 GMT - Antoine Martin: status changed; resolution set

status changed from assigned to closed
resolution set to wontfix

I don't think we can do any better, the correct solution is #56. See also #728, #732.

Note: Ubuntu breaks Xdummy, please bug them to figure out why.

Fri, 13 Nov 2015 06:16:59 GMT - Antoine Martin:

FYI: see wiki/DPI

Sat, 23 Jan 2021 05:08:44 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/882