xrandr 1600x900 (ThinkPad X220T VGA-port) becomes 1440x900 (Samsung SyncMaster S20A300B)
Hi everybody, I'm having a resolution issue trying to connect an
external monitor to a laptop.
Laptop: ThinkPad X220T
External Monitor: Samsung SyncMaster S20A300B
Debian: 11.8 (bullseye), updated
Connecting through laptop's VGA port (to VGA input in external
monitor) everything works apparently normal except that I can't get
the resolution right.
Laptop goes at 1366x768, and monitor informs 1600x900 as optimal
(which laptop's VGA-port should have no problem in providing,
apparently[0]), but from xrandr that mode doesn't appears as
automatically available.
I've tried adding it by hand:
$ cvt 1600 900
# 1600x900 59.95 Hz (CVT 1.44M9) hsync: 55.99 kHz; pclk: 118.25 MHz
Modeline "1600x900_60.00" 118.25 1600 1696 1856 2112 900 903 908
934 -hsync +vsync
$ xrandr --newmode "1600x900_60.00" 118.25 1600 1696 1856 2112 900
903 908 934 -hsync +vsync
$ xrandr --addmode VGA-1 1600x900_60.00
$ xrandr --output VGA-1 --mode 1600x900_60.00
, but then the monitor informs it's receiving 1440x900, the GUI gets
strangely distributed and image doesn't cover all of it
(horizontally), while laptop's GUI suddenly extends beyond its display
size.
I've also tried with lower resolutions and, for instance, both
1440x768 and 1368x768 are informed by monitor as 1280x768 -but at
least at 1368x768 both screens have same GUI distribution (consistent)
except that monitor seems a little horizontally compressed...
Any recommendation on how to make this work properly (I mean, to have
full-surface image on monitor, without deformation, and at 1600x900)?
Thanks a lot in advance!
[0] https://support.lenovo.com/us/en/solutions/pd015807-detailed-specifications-thinkpad-x220-tablet
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