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Re: xrandr 1600x900 (ThinkPad X220T VGA-port) becomes 1440x900 (Samsung SyncMaster S20A300B)



On 20/10/2023 20:13, Anssi Saari wrote:
Max Nikulin writes:

A decade ago I used a HDMI to DVI adapter plugged into the monitor (a
case a bit larger than a DVI male connector having a HDMI slot). I
would check if DP to DVI or DP to HDMI converters exist and have no
compatibility issues (e.g. I have heard of bugs related to support of
USB-C to DP chips).

[...] It would only
display its native resolution of 2560x1600 via dual link DVI, just
connecting via HDMI to DVI cable got me a quarter resolution 1280x800
which was quite grainy on a 30" display. I found some converter boxes
existed. From memory I think you could go from DP to DL-DVI directly,
from HDMI you needed to convert to DP first. [...]

BTW, considering the resolution and monitor in question, 1600x900 is
single link DVI territory so easier conversion and cables.

In my case it was a cheap adapter to connect HDMI (laptop) to DVI (monitor). It worked perfectly with a LG monitor having 1600x1200 resolution. By the way, this monitor worked reliably with an even older laptop that had VGA connector only. Of course, it was necessary to regularly run autoadjustment.

As for DP, my current laptop has "DP" label next to a USB-C connector. I am unsure if X220T has real DP connector.


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