[SOLVED] Font increases when switch video output. (Barebone XMonad)

NZinov · 2016-01-22 07:25:44

I have a problem with switching output from laptop screen to VGA and back. If I do so font in all newly started applications is larger than usual (even in simple ones, like dmenu). If I cycle outputs again the font grows more. If I make many cycles it eventually becomes enormous. The problem is fixed by X server restart (XMonad restart doesn't help).
Setup
I use XMonad launched with startx. Output is switched by xrandr called in a udev rule, if it makes sense. Here is the output of xrandr:

Screen 0: minimum 8 x 8, current 1366 x 768, maximum 32767 x 32767
LVDS1 connected (normal left inverted right x axis y axis)
   1280x800      59.99 +  50.00  
   1024x768      60.00  
   800x600       60.32    56.25  
   640x480       59.94  
   640x400       60.00  
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VGA1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 410mm x 230mm
   1366x768      59.79*+
   1280x800      59.81  
   1280x720      60.00  
   1024x768      75.08    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   640x480       75.00    72.81    66.67    60.00  
   720x400       70.08  
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

I use only one monitor at once.

The problem has persisted for a long time (and for a lot of upgrades), but I understood that it is connected with output switching only recently.
Any help would be appreciated.

Last edited by NZinov (2016-01-22 20:21:54)

Head_on_a_Stick · 2016-01-22 08:04:33

NZinov wrote:

Output is switched by xrandr called in a udev rule, if it makes sense.

Please post the udev rule (and the name of the file containing the rule).

Check the DPI before and after the fonts "grow"

xdpyinfo|grep dots

NZinov · 2016-01-22 08:16:25

Thanks for your quick reply, Head_on_a_Stick!

I checked DPI and there is definitely a problem! Here is the output (each command after another output switch)

 xdpyinfo|grep dots
  resolution:    96x97 dots per inch
$ xdpyinfo|grep dots
  resolution:    97x97 dots per inch
$ xdpyinfo|grep dots
  resolution:    97x97 dots per inch
$ xdpyinfo|grep dots
  resolution:    97x98 dots per inch
$ xdpyinfo|grep dots
  resolution:    97x98 dots per inch
$ xdpyinfo|grep dots
  resolution:    97x98 dots per inch
$ xdpyinfo|grep dots
  resolution:    98x98 dots per inch
$ xdpyinfo|grep dots
  resolution:    98x98 dots per inch

Here is the udev rule under rules.d:

$ cat 90-dock-hotplug.rules 
KERNEL=="dock.2", ATTR{docked}=="1", ENV{DISPLAY}=":0", ENV{XAUTHORITY}="/home/nikolay/.Xauthority",RUN+="/usr/bin/xrandr --output VGA1 --auto --output LVDS1 --off"
KERNEL=="dock.2", ATTR{docked}=="0", ENV{DISPLAY}=":0", ENV{XAUTHORITY}="/home/nikolay/.Xauthority",RUN+="/usr/bin/xrandr --output VGA1 --off --output LVDS1 --auto"

My laptop is a thinkpad x200 and I have a docking station. This rules checks if that station is connected.

Thanks for you help!

Last edited by NZinov (2016-01-22 08:16:50)

NZinov · 2016-01-22 08:17:55

Going to read smth about DPI on the wiki.)

Head_on_a_Stick · 2016-01-22 08:23:25

You can try setting the DPI explicitly in your `startx` command:

startx -- -dpi 96

(other methods are available)

NZinov · 2016-01-22 08:28:31

Thank you very much, Head_on_a_Stick! This worked for me.

Head_on_a_Stick · 2016-01-22 19:56:50

Excellent!

Please add [SOLVED] to the thread title for the benefit of others

Arch Linux

#1 2016-01-22 07:25:44

[SOLVED] Font increases when switch video output. (Barebone XMonad)

#2 2016-01-22 08:04:33

Re: [SOLVED] Font increases when switch video output. (Barebone XMonad)

#3 2016-01-22 08:16:25

Re: [SOLVED] Font increases when switch video output. (Barebone XMonad)

#4 2016-01-22 08:17:55

Re: [SOLVED] Font increases when switch video output. (Barebone XMonad)

#5 2016-01-22 08:23:25

Re: [SOLVED] Font increases when switch video output. (Barebone XMonad)

#6 2016-01-22 08:28:31

Re: [SOLVED] Font increases when switch video output. (Barebone XMonad)

#7 2016-01-22 19:56:50

Re: [SOLVED] Font increases when switch video output. (Barebone XMonad)

Board footer