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Osiris

Member

Registered: 2003-01-18

Posts: 157

Website

Getting display to run at native resolution

Hello,

I just connected a (supposingly) old HP L2245wg display to my laptop. I used a Mini-DP to DVI cable. The DVI connector looks like DualLink (all pins are there)

xrandr gives me:

HDMI1 connected 1600x1000+1920+0 (normal left inverted right x axis y axis) 470mm x 300mm
   1680x1050     59.95 +
   1600x1000     60.01*
   1280x1024     75.02    60.02

So you see the display is not running at its preferred resolution, but it works.

Using the native resolution: xrandr --output HDMI1 --auto

HDMI1 connected 1680x1050+1920+0 (normal left inverted right x axis y axis) 470mm x 300mm
   1680x1050     59.95*+
   1600x1000     60.01 
   1280x1024     75.02    60.02

but the display stays blank. I can not even enter the OSD menu. The graphics adapter can surely deliver the resolution, I have ran displays at 1920x1080 at this output.

xrandr --output HDMI1 --mode 1600x1000 restors the display, but not at its native resolution.

I also tried different --rate parameters (60, 50, 30).

Graphics card driver is xf86-video-intel.

I hope anyone of you has any ideas!

EDIT: I noticed that are also some colors wrong, like a yellow shadow, sometimes connected to the mouse cursor. May the cable be defect? (bought in a small shop in Singapore)

Thanks!
Florian

Last edited by Osiris (2017-07-05 02:48:49)

LaurentvdB

Member

Registered: 2017-04-24

Posts: 32

Re: Getting display to run at native resolution

[...]

Graphics card driver is xf86-video-intel.

[...]

I honestly cannot help you a lot with the monitor issues, but you could try to remove (or disable) the xf86-video-intel package (or driver) as it is known to be unstable for some. See Intel graphics. Should be easy to test I guess.

Osiris

Member

Registered: 2003-01-18

Posts: 157

Website

Re: Getting display to run at native resolution

Thanks for your input, unfortunatly it changed nothing, only that my laptops display background setting has no effect anymore.

Lone_Wolf

Forum Moderator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 11,922

Re: Getting display to run at native resolution

HDMI1 connected 1600x1000+1920+0

That line looks like you have 2 monitors, is that correct ?

HDMI1  &  "I used a Mini-DP to DVI cable"

Is the cable connected to a DisplayPort connector or to HDMI ?

Post full xrandr output, lspci -k ,  and xorg log please.

---

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)

Osiris

Member

Registered: 2003-01-18

Posts: 157

Website

Re: Getting display to run at native resolution

Unfortunatly, in the meantime I found another way and also exchanged the cable.

It seems that the DP is internally treated as HDMI.

severach

Member

Registered: 2015-05-23

Posts: 192

Re: Getting display to run at native resolution

Dual-mode DisplayPort

DisplayPort changes to HDMI if it senses that type of monitor.