Difference between revisions of "FAQ:fit-Headless"

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(Supported resolutions on fit-Headless emulators)   (change visibility)
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=== Custom Resolutions ===
 
=== Custom Resolutions ===
 
Take a look at setting up custom resolutions on your video card driver.
 
Take a look at setting up custom resolutions on your video card driver.
 +
 +
=== How to enable HDMI Audio support on fit-Headless GS ===
 +
fit-Headless GS HDMI audio was qualified with NVIDIA and with Intel HD.<br>
 +
We did not have an opportunity to test with AMD Radeon, and AMD drivers may behave differently.<br>
 +
 +
* In some cases system restart is required to enable the HDMI audio.
 +
* Simplifying the setup - that is connecting a single fit-Headless GS to the primary (or better yet - single) graphics card.
 +
 +
Workaround reported by our customers - AMD seems to have a 165MHz pixel clock limit when using an HDMI connection, which is exceeded when using resolutions & refresh rates higher than 1080p@60hz.
 +
Using a third-party utility ToastyX Custom Resolution Utility, import a custom EDID extension block for HDMI audio support, and remove all custom fit-headless GS resolutions from the EDID string that were higher than 1080p@60Hz. After reboot HDMI audio on the fit-headless GS should be present. Alternatively, one might be able to use the higher resolutions & refresh rates by patching the AMD Radeon driver to bypass the 165Mhz clock limit, although this can break HDCP functionality.
 +
 +
* [http://www.monitortests.com/forum/Thread-Custom-Resolution-Utility-CRU Custom Resolution Utility]
 +
* [http://www.monitortests.com/forum/Thread-AMD-ATI-Pixel-Clock-Patcher AMD/ATI Pixel Clock Patcher]
 +
  
  
 
[[category:FAQ]]
 
[[category:FAQ]]
 
[[category:fit-Headless]]
 
[[category:fit-Headless]]

Revision as of 14:32, 24 November 2016

What problem fit-Headless solves?

On Mac Mini Server

Screen sharing on a Mac Mini Server that has no display attached (headless) is low-resolution and slow.

On a headless PC

One of the key requirements in using a PC without a display attached (headless PC) is remote desktop access, but in many cases configuring the headless PC to support high resolution remote desktop proves to be so challenging that sometimes users connect a display to the PC just to be able to have remote desktop access!

How fit-Headless solves the problem?

fit-Headless is a small, low-cost HDMI plug that emulates a high resolution display. Once plugged, the Mac Mini / PC detects a connected display and enables the GPU. With the GPU enabled, screen-sharing / remote desktop access can work in high resolution.

Does fit-Headless help in running a headless Intel NUC?

Yes. See for example http://www.vfrank.org/2015/04/28/running-the-intel-nuc-headless-with-vmware-esxi/
fit-Headless solves a problem known as "AMT/vPro blank screen", see http://www.tekhead.org/blog/2015/05/

Supported resolutions on fit-Headless emulators

Under different OS (Windows, OSX and Linux) available resolutions may vary. Available resolutions depend on OS, display driver and GPU capabilities.

The below programmed EDID resolutions given for reference only (may be overridden by OS/GPU/driver):

fit-Headless fit-Headless 4K fit-Headless GS

1920x1080 (default)
1280x1024
1280x720
1152x864
1024x768
800x600
720x576
720x480
720x400
640x480

4088x2304
3840x2160
2880x1800
2560x1600
2560x1440
2048x1536
1920x1080
1680x1050
1600x1200
1600x900
1440x480
1368x768
1366x768
1360x768
1360x765
1280x1024
1280x800
1280x720
1152x870
1024x576
1024x768
832x624
800x600
720x400
640x480

4096x2160@59Hz
4096x2160@60Hz
4096x2160@29Hz
4096x2160@30Hz
3840x2160@59Hz
3840x2160@60Hz
3840x2160@29Hz
3840x2160@30Hz
3840x2160@25Hz
3840x2160@23Hz
3840x2160@24Hz
3440x1440@90Hz
2560x1600@59Hz
2560x1600@60Hz
2560x1600@29Hz
2560x1600@30Hz
2560x1600@25Hz
2560x1600@23Hz
2560x1600@24Hz
2560x1440@120Hz
2560x1080@119Hz
2560x1080@120Hz
2160x1200@90HZ
2160x1200@120Hz
2048x1536@59Hz
2048x1536@60Hz
2048x1536@29Hz
2048x1536@30Hz
2048x1536@25Hz
2048x1536@23Hz
2048x1536@24Hz
1920x1080@120Hz
1920x1080@75Hz
1920x1080@59Hz
1920x1080@60Hz
1920x1080@119Hz
1920x1080@59Hz
1920x1080@59Hz
1920x1200@120Hz
1920x1440@120Hz
1768x992@75Hz
1768x992@59Hz
1768x992@60Hz
1768x992@119Hz
1768x992@120Hz
1680x1050@59Hz
1680x1050@60Hz
1680x1050@119Hz
1680x1050@120Hz
1600x900@60Hz
1600x900@119Hz
1600x900@120Hz
1600x1024@59Hz
1600x1024@60Hz
1600x1024@119Hz
1600x1024@120Hz
1600x1200@120Hz
1600x1200@60Hz
1368x769@60Hz
1368x769@119Hz
1368x769@120Hz
1360x768@60Hz
1360x768@119Hz
1360x768@120Hz
1360x765@60Hz
1360x765@119Hz
1360x765@120Hz
1280x720@60Hz
1280x720@119Hz
1280x720@120Hz
1280x768@60Hz
1280x768@119Hz
1280x768@120Hz
1280x800@60Hz
1280x800@119Hz
1280x800@120Hz
1280x960@75Hz
1280x960@119Hz
1280x960@120Hz
1280x1024@75Hz
1280x1024@119Hz
1280x1024@120Hz
1176x664@60Hz
1152x864@60Hz
1152x864@119Hz
1152x864@120Hz
1024x768@75Hz
1024x768@60Hz
1024x768@119Hz
1024x768@120Hz
800x600@75Hz
800x600@60Hz
800x600@119Hz
800x600@120Hz
720x480@75Hz
720x480@60Hz
720x480@119Hz
720x480@120Hz
720x576@75Hz
720x576@60Hz
720x576@119Hz
720x576@120Hz
640x480@75Hz
640x480@60Hz
640x480@119Hz
640x480@120Hz

How can I get more resolutions with fit-Headless 4K on OSX?

To unleash the full potential of fit-Headless 4K under OSX we recommend the freeware utility "Display Menu" available on iTunes App Store. In most cases fit-Headless 4K will support up to 30 different resolutions:
https://itunes.apple.com/en/app/display-menu/id549083868?mt=12

Please also see the explanations and notes on fit-pc website:
http://www.fit-pc.com/web/fit-headless-4k-overview/

Google+ page that shows the resolutions related to OSX operation:
https://plus.google.com/+Fitpc-by-compulab/posts/cw5KR7CbTYU

SwitchResX

SwitchResX is a tool for Apple computers to take control of any screen connected to the Mac. No matter whether a MacBook Screen, an external monitor, a Retina display, a TV set or a beamer: SwitchResX can handle them all – if you want, straight from the menubar, a contextual menu or both.
http://www.madrau.com/
http://www.madrau.com/srx_howtouseit/howtouseit.html

Can I increase refresh rate?

For high refresh rate, consider using fit-Headless GS

Custom Resolutions

Take a look at setting up custom resolutions on your video card driver.

How to enable HDMI Audio support on fit-Headless GS

fit-Headless GS HDMI audio was qualified with NVIDIA and with Intel HD.
We did not have an opportunity to test with AMD Radeon, and AMD drivers may behave differently.

  • In some cases system restart is required to enable the HDMI audio.
  • Simplifying the setup - that is connecting a single fit-Headless GS to the primary (or better yet - single) graphics card.

Workaround reported by our customers - AMD seems to have a 165MHz pixel clock limit when using an HDMI connection, which is exceeded when using resolutions & refresh rates higher than 1080p@60hz. Using a third-party utility ToastyX Custom Resolution Utility, import a custom EDID extension block for HDMI audio support, and remove all custom fit-headless GS resolutions from the EDID string that were higher than 1080p@60Hz. After reboot HDMI audio on the fit-headless GS should be present. Alternatively, one might be able to use the higher resolutions & refresh rates by patching the AMD Radeon driver to bypass the 165Mhz clock limit, although this can break HDCP functionality.