Arch Linux

milkpku

Member

Registered: 2016-05-26

Posts: 1

Benq EW2440 can only display 1024x768 rather than 1920x1080

I have an old laptop HP compaq Presario V3000 with arch installed. Now I want to link it with a BENQ monitor (EW2440 1920x1080) by VGA, but the monitor is recognized to only support 1024x768 at most. Since the monitor only supports VGA and HDMI, and my laptop only supports VGA, I have to chose VGA.

Here are some information:

$ lspci -v
...
00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) (rev 0c) (prog-if 00 [VGA controller])
	Subsystem: Hewlett-Packard Company Device 30cd
	Flags: bus master, fast devsel, latency 0, IRQ 31
	Memory at f4000000 (64-bit, non-prefetchable) [size=1M]
	Memory at d0000000 (64-bit, prefetchable) [size=256M]
	I/O ports at 1800 [size=8]
	Expansion ROM at <unassigned> [disabled]
	Capabilities: <access denied>
	Kernel driver in use: i915
	Kernel modules: i915
...

$ xrandr
Screen 0: minimum 8 x 8, current 2304 x 800, maximum 32767 x 32767
LVDS1 connected primary 1280x800+1024+0 (normal left inverted right x axis y axis) 303mm x 190mm
   1280x800      60.00*+
   1024x768      60.00  
   800x600       60.32    56.25  
   640x480       59.94  
   640x400       60.00  
TV1 unknown connection (normal left inverted right x axis y axis)
   848x480       59.94 +
   640x480       59.94 +
   1024x768      59.94  
   800x600       59.94  
VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768      60.00* 
   800x600       60.32    56.25  
   848x480       60.00  
   640x480       59.94  

I have tryed the following steps but it does not work, the screen just flashes and remain 1024x768:

$ cvt 1920 1080
# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync

$ xrandr --newmode "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
$ xrandr --addmode VGA1 1920x1080_60.00
$ xrandr --output --mode VGA1 1920x1080_60.00

Is there any way to solve this problem? or other way to make monitor work normally? and I am also wondering what is the TV1 channel?

Thanks!

Last edited by milkpku (2016-05-27 02:18:59)