Intel HD Graphics 520 refuses to output 4K... sometimes.

[CMild]

Short Description:

I'm connecting my laptop to a 4K display via HDMI. Some of the time, it works fine, but other times, the graphics card/driver defaults to sending 1080p to the monitor, and doesn't display the options for higher resolutions. Does anyone know why this would happen or how to fix it? (Relevant system and monitor specs are included at the end of this message.)

Detailed Description:

As I said, sometimes it works fine, but sometimes I'll plug the monitor in and the graphics card will only send 1080p. When the issue is occurring and I look at the Intel HD Graphics Control Panel, I can see that the driver still knows the maximum resolution of the monitor:

but this resolution doesn't appear as an option in the settings drop-down, either within the Intel Control Panel:

...or in the Windows Control Panel:

When I view the monitor's properties under "Devices" in Windows and "List All Modes", Windows does not seem to know that the monitor is capable of 4K:

I tried setting a custom resolution of 4K for that monitor using the Intel Control Panel, which reluctantly seemed to work (it took a restart, I think), but I suffered a major RAM failure a few days later, which seemed to originate with the graphics card (the first sign of failure was the on-board screen flickering and becoming checkered before the computer became unresponsive). Because of that, I'm concerned that I could be damaging my hardware by setting a custom resolution through the Intel Control Panel, even if I'm setting a resolution that I know should work.

All my drivers are up-to-date, my HDMI 2.0 cable is able to support 4K, and I'm only using my on-board monitor or the external monitor, never both (so no cloning issues).

If this problem were always happening, then I'd try reinstalling Windows or flashing my BIOS, but the fact that it only happens some of the time makes me think that it's not the type of consistent problem that would come from issues at that level.

Does anyone have any clue how to fix this mess? I currently have a 4K monitor that I can't use, so I'd really appreciate your help. Thanks!

Computer:

Lenovo ThinkPad T460s (type 20F9-CT01WW)

OS: Windows 7 Pro (x64)

CPU: Intel core i7-6600U @ 2.60 Ghz

Graphics: Intel HD Graphics 520 (capable of outputting 4K via HDMI, specifically 3840 x 2160 30p Hz)

External Monitor:

LG 27UD68-P

(capable of displaying 3840 x 2160)

[RCorf1]

I'm also having this same issue, would like to see a fix

[idata]

Hello Dugen and corski,

Would you please fill out the form that is in the following link and post it on this thread? /thread/77761 https://communities.intel.com/thread/77761 Please also attach the Intel® System Support Utility and DxDiag reports. Regards,Fred D.

[DUrza]

Thanks Fred for the response.

I've previously done just that in a different thread, titled

/message/510878# 510878 Difficulty playing UHD 4k (3840×2160) video.

The information you seek is available there. If you have any difficulty accessing that information, please let me know.

Thank you so much for your help.

In addition,

I'm now getting occasional stuttering when playing 1080p videos as well (especially, though not limited to, VLC player.)

Dugen

[MBrau7]

Hi,

I have the same issue...

I was working some time ago with my Lenovo Thinkpad x260 with Intel Graphics 520 on a 4K display without so much issues (Sometimes was failing, but I have updated the driver every time and works again...)

One week ago, I start with the same issue again and again, the intel graphics 520 driver is not able to work on a 4K resolution. When I install any Intel drivers (Old ones and New ones) max resolution is 1920x1080.

The stranger thing is that If I uninstall all Intel Graphic 520 drivers, without any driver installed, my display resolution is working on 4K! (With horrible graphics, without windows aero, etc... but 4K resolution) with the latest Intel drivers, the max resolution is not more than 1920x1080. (With the latest driver is failing also the HDMI audio...)

I have also tried to add a custom resolution but no way to add the new resolution because I have a warning message informing that the max resolution is 1920x1080.

Summary: Without any INTEL GRAPHIC DRIVER is working on 4K resolution. With the latest intel graphic, max resolution is 1920x1080...

I will appreciate any help that could solve this issue.

Thanks,

[idata]

Hello MarcBraut,

Thank you for joining the thread. In order to assist you better with the specific problem you are having in your computer I recommend creating a new thread. Please make sure you add all of the details of your computer so we can get more information about the problem. Regards,Fred D.