Notebook won't offer full resolution on external display

[marcelhirsch]

Hi forum experts,

I have bought a brand new monitor which works fine with my laptop (MacBook 2018 13" over USB-C to HDMI adapter), but throws resolution issues with my gf's laptop. It shows 2560x1440 as the max resolution, which isn't the highest and which is also not the correct ratio, resulting in a wide-stretched picture.

• Laptop: HP Pavilion x360 – 14-ba026ng (Specs)
  • Intel i3-7100U & Intel HD Graphics, should give up to 4096x2304@24Hz over HDMI 1.4 (Source)
  • Windows 10, latest updates

• Display: iiyama PROLITE XUB3493WQSU-B1 (3440x1440) (Specs)

  • connected via HDMI cable (tested several, also the one that I am successfully running 3440x1440 over, so this shouldn't be the issue).

Additional checks performed:

• Drivers --> all up to date, including BIOS update

• HDMI cable --> tried several without success

• Tried all windows builtin menus without success

I could not find any information, which HDMI version the laptop uses. As far as I know the HDMI standard needs to be at least HDMI 1.4 to support the desired resolution. Please correct me if I'm wrong. HDMI 1.4 was introduced in 2009 and the laptop is from 2017, so I suppose it has HDMI 1.4.

I can't think of any reason why it just won't work. Does anyone have an idea? Last option would be to (unfortunately) sell the monitor and try another one. Thank you so much guys!

[banhien]

@marcelhirsch 

From its manual,  page 3. It has following ports

● AC Smart Pin adapter plug
● Audio-out (headphone)/audio-in (microphone) combo jack
● HDMI v1.4 supporting up to 1920×1080 @ 60Hz
● USB 3.x ports (2)
● USB Type-C port supporting data transfer

Regards.

[marcelhirsch]

Hi @Banhien,

thank you for the info. I could not find the specific manual online, that's why I could not check this important fact. As I conclude the only workaround would be an external graphics card over USB 3.0 (USB-A), right?

-marcel