Jun 29, 2014 - 03:54am
I'm trying to get the most out of my Core i5-2410M laptop connected to an UHD monitor via HDMI, on Ubuntu 14.04. Using try & error with the xrandr command, I was able to get 3840x2160 @25.2 Hz out of it using CVT with reduced blanking.
The limit appears to be the "pclk" parameter, which will only go up to 224.xx MHz. Anything above that yields an error message that the CRTC could not be set.
Q1: Is 224MHz pclk really the hard limit of the Intel HD Graphics 3000 hardware, or is it a limit of the Intel HD Graphics 3000 driver?
Q2: If it's a limit of the driver, is it possible to circumvent / increase that limit somehow?
Q3: Is it possible to _query_ the maximum pclk an X driver will accept? I tried all sorts of commands, yet found none which outputs this number...
I was wondering what Modeline you are using to get email@example.comHz?
The highest rate I could get is 13.80Hz.
Use "cvt -r 3840 2160 60" to get a Modeline for 3840x2160 @60Hz with reduced blanking, then change the first number in the line (the pixel clock) from 533.00 to 224.99. If you manage to get higher pixel clock values working, please let me know...