I have a laptop I use at work (with a docking station), in the train and at home (with an external display), on which my environment is ion3.
As I use suspend-to-RAM all the time, I have added some keybindings to automatically reconfigure my screen when I plug/unplug an external display (on the dock as well as direct VGA connection).
The lua code to paste in your .ion3/cfg_ion.lua for the bindings looks like:
function autoscreen_on()
local f = io.popen('/home/david/bin/autoscreen -c', 'r')
if not f then
return
end
local s = f:read('*a')
f:close()
ioncore.restart()
end
function autoscreen_off()
local f = io.popen('/home/david/bin/autoscreen -d', 'r')
if not f then
return
end
local s = f:read('*a')
f:close()
ioncore.restart()
end
defbindings("WMPlex.toplevel", {
bdoc("Turn on any external display and tell ion to reconfigure itself"),
kpress(META.."F10",
"autoscreen_on()"),
})
defbindings("WMPlex.toplevel", {
bdoc("Turn off any external display and tell ion to reconfigure itself"),
kpress(META.."F11",
"autoscreen_off()"),
})
It makes use of the following python script (named /home/david/bin/autoscreen in the lua code above):
#!/usr/bin/env python
import sys
import os
import re
from subprocess import Popen, PIPE
import optparse
parser = optparse.OptionParser("A simple automatic screen configurator (using xrandr)")
parser.add_option('-c', '--connect', action="store_true",
dest='connect',
default=False,
help="configure every connected screens")
parser.add_option('-d', '--disconnect', action="store_true",
dest='disconnect',
default=False,
help="unconfigure every connected screens other than LVDS (laptop screen)")
parser.add_option('', '--main-display',
dest='maindisplay',
default="LVDS",
help="main display identifier (typically, the laptop LCD screen; defaults to LVDS)")
options, args = parser.parse_args()
if int(options.connect) + int(options.disconnect) > 1:
print "ERROR: only one option -c or -d at a time"
parser.print_help()
sys.exit(1)
xrandr = Popen("xrandr", shell=True, bufsize=0, stdout=PIPE).stdout.read()
connected = re.findall(r'([a-zA-Z0-9-]*) connected', xrandr)
connected = [c for c in connected if c != options.maindisplay]
cmd = "xrandr --output %s %s"
if options.connect or options.disconnect:
for c in connected:
if options.connect:
action = "--auto"
elif options.disconnect:
action = "--off"
p = Popen(cmd % (c, action), shell=True)
sts = os.waitpid(p.pid, 0)
