Apple M1 - LG 4k monitor, not showing 2560 x 1440 resolution?

anthlover · 03-17-2021, 03:07 AM

You do not mention your Display link device or Mac model and how many displays you have, In my case I have an M1 Air and 15 inch Retina (two 32 inch displays [1 4K LG like yours and one 1440]). I do have both a thunderbolt dock as well Display link basked Targus 180. Generally Thunderbolt docs are better generally for Intel MACS as no driver is required at all and of course thunderbolt runs at 40Gbs second versus 5GB for most USB-C/displaylink based devices. Plenty for most uses, but not all.

None the less with my Targus 180 having so many ports including power delivery for either computers even my M1 has a port free. So I run my 4K display direct via a USB-C display port adapter (you can do the same with a USB-C to HDMI as well).

This increases the reliability of clam shell mode, solves the 1440 on 4K display issue and more.

In my case I ended up using the Targus for both computers even though the 15 inch Retina spends 85 percent of the time at the Dock. It much less recabling that way,

03-17-2021, 03:07 AM	#12
anthlover Junior Member Join Date: Dec 2020 Posts: 25	1440 on 4K appears to be problematic on a number of displays over display link You do not mention your Display link device or Mac model and how many displays you have, In my case I have an M1 Air and 15 inch Retina (two 32 inch displays [1 4K LG like yours and one 1440]). I do have both a thunderbolt dock as well Display link basked Targus 180. Generally Thunderbolt docs are better generally for Intel MACS as no driver is required at all and of course thunderbolt runs at 40Gbs second versus 5GB for most USB-C/displaylink based devices. Plenty for most uses, but not all. None the less with my Targus 180 having so many ports including power delivery for either computers even my M1 has a port free. So I run my 4K display direct via a USB-C display port adapter (you can do the same with a USB-C to HDMI as well). This increases the reliability of clam shell mode, solves the 1440 on 4K display issue and more. In my case I ended up using the Targus for both computers even though the 15 inch Retina spends 85 percent of the time at the Dock. It much less recabling that way, Last edited by anthlover; 03-17-2021 at 03:12 AM.