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dpi changes on the fly



Hi,

Running Sid with Nvidia driver 9631.

X has always been rock solid, but recently I notice that the DPI settings of the display changes on the fly, when I do:

xdpyinfo | grep 'dots per inch'

I normally get 110x110. That's what I set it to in /etc/gdm/gdm.conf:

...
command=/usr/bin/X0 :1 -layout X0 -dpi 110 -deferglyphs 16 -isolateDevice \"PCI:1:0:0\" -sharevts
...

But recently "suddenly"... maybe related to running Qt apps? the DPI setting changes on the fly to 138x88 and all font sizes get tiny.

Logging out and back in sets it back to 110x110.

Is that possible, those DPI changes on the fly?

How does it happen?

Hugo



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