5

I can't get my monitor to run in 4096x2160.

The highest available resolution listed in control panel is 3840x2160:

control panel

Same when listing "all modes" from the graphics adapter properties in hardware manager:

graphics properties

Monitor is LG 31MU97-B - the resolution is supported and the OSD keeps reminding me the recommended resolution is, indeed, 4096x2160 :)

  • updating drivers didn't add the desired mode even though the inf file lists it
  • tried w/ "generic PnP monitor" as well

Connected to Surface 4 Pro i7

  • the resolution is listed as supported
  • tried connecting w/ DP directly and through the dock
  • tried w/ "extend" and "external only" modes

I've tried adding a custom resolution w/ CRU, but that doesn't seem to be available on 4096px width (note the disabled "OK" button below)

cru

NB: this monitor has been used at 4096x2160 resolution (same cable)

harrymc
  • 455,459
  • 31
  • 526
  • 924
Oleg
  • 613
  • 6
  • 16
  • Check if you have enough memory allocated in the BIOS for the card to use that resolution. Just to verify, next boot, give it a chunk more. – Aganju Dec 21 '15 at 19:36
  • The device manager indicates 8gb shared memory – Oleg Dec 22 '15 at 00:23
  • Have you tried using the [Intel HD Graphics Control Panel to set a custom resolution](https://web.archive.org/web/20150503125726/http://www.intel.com/support/graphics/sb/cs-029478.htm)? – Vinayak Dec 23 '15 at 01:06
  • @Vinayak: the control panel is not available with the custom drivers for Surface. Installing intel drivers renders the tablet unusable (had to do a restore) – Oleg Dec 23 '15 at 01:16
  • Maybe it's a cable issue? Someone had a [similar problem](https://answers.microsoft.com/en-us/surface/forum/surfpro3-surfdevice/cannot-get-4k-resolution-on-dell-p2715q/6f6fca9b-a752-4c5d-bbdd-cf561a7b8436) that they resolved by switching cables. – Vinayak Dec 23 '15 at 03:09

1 Answers1

4

I believe that the problem is with the Iris Graphics 540 card.

It seems that displays can only be connected to it using DisplayPort 1.2 / eDP 1.3 which maxes out at 3840 x 2160 @ 60 Hz, or using HDMI limited to the older version 1.4a which also maxes out at 3840 x 2160 @ 30 Hz.

You might try to use the less-limited HDMI 2.0 by adding a DisplayPort converter that supports it. Such converters may be bought in stores or on Internet shopping websites.

Or if possible for your computer, add/replace the video card.
(Edit: The last sentence was written before I knew the post was about the Surface Pro.)

Sources:

harrymc
  • 455,459
  • 31
  • 526
  • 924
  • interesting; in the spec originally linked to it's indicated that [Iris supports the resolution](https://www.microsoft.com/surface/en-nz/support/music-photos-and-video/connect-surface-to-a-tv-display-or-projector?os=windows-10). I'll investigate HDMI 2.0 option – Oleg Dec 22 '15 at 00:21
  • Do you know what adapter you're currently using? A further source verifies a DP -> HDMI 2.0 adapter is required if you're not using DP directly: http://www.anandtech.com/show/9483/intel-skylake-review-6700k-6600k-ddr4-ddr3-ipc-6th-generation/4 Edit: Just spotted you are using DP directly - that doesn't match what I expected from the source after all. – Jonno Dec 22 '15 at 11:11
  • @Jonno: I'm using DP directly and have used it on another system to drive at the desired resolution. Updated the question to disambiguate. – Oleg Dec 22 '15 at 19:36