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I wonder if I can output 4k resolution (3840 × 2160) @ 30Hz with a Intel HD4000 graphics using Linux and a single HDMI output.
I have a Thinkpad Edge E330 with HDMI 1.4. The CPU is an i5-3210M.
I know that there is a problem with the pixel clock (which is limited to 165MHz) which limits the output maximal output power. Now I know, that there are patches for Mac OS X.
Where is the pixel clock limited? In the kernel? In the graphics driver? Can it be removed/fixed in general?
Is the HD4000 powerful enough to be able to drive 4k @ 30Hz in general?
2Regarding whether it is powerful enough to "drive" a 4K display @ 30 Hz... it has enough memory bandwidth to blit the screen at well above that frequency. RAMDAC is not a factor in this case, since you are using HDMI... and an HDMI 1.4 TMDS is capable of supporting 4K at 30 Hz However, if you are doing anything complicated like rendering a 3D scene with overdraw the story could be very different. – Andon M. Coleman – 2014-02-03T01:58:15.300
Of course the HD4000 is not capable of doing "serious" stuff at 4k resolution. I want the 4k for general purpose mostly (programming and watching video(s) in parallel, so nothing too fancy! For more heavy stuff I can always downsize the resolution to Full HD or so.
But thank you, it is good to know the HD4000 is suitable in general! – kernelpanic – 2014-02-03T02:21:18.557