How to Increase display resolution to 2560x1440
 

I just purchased a relatively expensive AOC Q2577PWQ monitor in the hopes of getting increased resolution, but so far it seems stuck at 1920x1080.

I am running Slackware64 14.2 and KDE. I have an ASUS video card with NIVIDA GEFORCE GT710. I am running the NVIDIA driver version 387.34. I am NOT running with an Xorg.conf file.

I have two monitors: a 22" LG conneted via DVI which is only 1920x1080; and the (new) 25" AOC connected via VGA which is rated to 2560x1440.

In KDE > System Settings > Display and Monitor > Size and Orientation, the size of the AOC is shown as 1920x1080. There is no selection for greater resolution listed.

How can I fix this?

Out of interest, what type of connection is use between monitor and graphics card? (DVI, HDMI, DP cable...)
Sometimes the monitor EDID doesn't provide the driver with the monitor's true capabilities. This shows up in the Xorg.0.log if you care to inspect it. If you want to share that here, upload the contents to https://pastebin.com/ and post the link to it here for others to review.

It is often possible to create a custom display mode and use xrandr commands to set it. This can be made permanent by adding the required commands via an 'autostart script' executed at login...

https://wiki.archlinux.org/index.php/xrandr
https://askubuntu.com/questions/6379...rtup-in-ubuntu

I have the AOC Q3277 and it is working fine here. You should try to use the DP cable as it allows for a better resolution.

Since you are running the nVidia driver you should be able to open the nVidia Server Setting GUI and in there look under X Screen # for the number of the screen you have the AOC connected to. Look at the Resolution and make sure it shows a setting for 2560x1440.

I'm using VGA for this monitor. xrandr:
Xorg.0.log uploaded: https://pastebin.com/EM8Hq11b
I don't believe the GT710 has a DP port, but I do have DVI and HDMI in addition to the VGA. Do you think changing cables would do the trick?
I've done that and no it does not show 2560x1440. I've tried letting NVIDIA-setting create an xorg.conf file (shown below). Based on other wesite clues I've made the changes shown in lines 86 and 111, but that didn't work. The AOC monitor didn't even show up.

As I suspected might be the case. That is the reason for the limited display resolution.

Yes, I do think it will do the trick (as lazydog also mentioned). Use an HDMI cable if your monitor supports it. :)

farrari/lazydog: YES! That did it. That was stupid-simple. I simply swapped the VGA and DVI cables between monitors and it picked up the 2560x1440 resolution for the new monitor. It would be nice if all issues were that simple to resolve. So, new fun-fact for me: VGA does not exceed 1920x1080. I didn't know that.

Hello!

I have the same problem with the same screen and latest ubuntu version 18.04. I'm using the screen as an external one for my laptop and the max resolution the system can detect is FHD while the screen supports 2K (Works on windows). OP solved problem by using HDMI, however, I'm already using HDMI and but can't see 2K resolution. I am sure the HDMI cable I'm using can deliver 2K because it works on Windows.

I have tried everything mentioned in this thread without success.

Since I have an optimus setup, I did everything I can to disable nvidia card and only leave the integrated intel HD but still same issue.

Here's output of xrandr:

Thanks in advance for your help.

What is your output in an Xterm from

Here it is:

Hi,

No, the OP switched to DVI; Try the DVI port?

So you tried installing bumblebee for Optimus?
<snip>
Hope this helps.
Have fun & enjoy!
:hattip:

Thanks @oneback for your reply.

You're correct. But it still amazes me how something can easily work on Windows but fails to work in Ubuntu. I even extracted the correct EDID binary for my monitor from windows and forced it in Ubuntu with no luck. Right now I'm waiting for a DP->mDP adapter to arrive and I hope it'll work. Having to buy extra cables just to make Ubuntu happy...

No i didn't install bumblebee but I'm pretty sure I'm only running on Intel card and not Nvidia. I also tried my monitor on a different laptop that only have one integrated card and still same issue, so I guess it's not the optimus setup that's causing the issue.

We'll report back once I get my new cable but if anyone has a solution to make it work with HDMI like in Windows I'd be happy to try it.

Thanks.

I can only speculate here, but the limitation may well be with the kernel (i915) driver itself, or perhaps with this particular monitor's EDID format. For example, here's an Ubuntu thread where the OP mentions that although the 1st EDID block was read successfully (by the graphics driver), use of the 'get-edid' utility reported the existence of an additional EDID block, which could not be read successfully.

https://en.wikipedia.org/wiki/Extend...ification_Data

I wonder if there's some obscure setting you could change in your BIOS that would make Xorg able to automatically find 2560x1440? I tried as close as I could to get a similar failure given I have no laptops or 2560x1440 displays. The original HDTV spec didn't allow for modes above 1920x1080, so if your laptop was materially older I would expect this to be a limitation. But you have Intel Haswell, which I'm typing on here. And, I do have a 2560x1080 that shouldn't be supported on older HDMI ports. Here's what I get on Haswell, first with openSUSE 15.0 with X server 1.19.6 (same as *buntu 18.04), then openSUSE Tumbleweed (same PC, server 1.20.0), then on Kaby Lake with *buntu 18.04.1:You can see that unlike my inxis, yours (v2.3.56-00?) reported neither the xorg driver in use nor the alternates available. As inxi is actually just a script, you might be interested to try the latest version from upstream to see if it does better. I expected to see you using intel(0), and wonder if that is the driver in use, and if so, whether purging xserver-xorg-video-intel, which should employ Xorg's integrated modeset(0) driver if bumblebee isn't installed, might be a software solution?

Something else to try: xorg.conf. It always used to work for me with errant or invalid EDID, without needing manually generated modelines. Try this:

Another possible addition to xorg.conf: the screen size, something like this:
One of my old monitors had a native resolution of 1680x1050 but Xorg wouldn't use it without an explicit statement of the screen size (in mm). I just measured it with a ruler and tweaked it a bit to get the proper aspect ratio.