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Any work being done by Fedora to fix start-up message "[drm:ironlake_crtc_compute_clock [i915]] *ERROR* Couldn't find PLL settings for mode!" followed by blank screen?

asked 2016-09-18 18:50:26 -0500

couran gravatar image

Hi, there are a few messages about this problem which has been noted since kernel 4.7.1 was added to updates. i was using Fc23 and hoped that the problem would be fixed by upgrading to Fc24. This did not help. Apparently the problem is restricted to only a few laptops. Mine is a Samsung NX900X4C and uses the Intel 4000 graphics driver. It is one of the affected laptops. A patch has been proposed on and on but it looks like it is still being modified or tested. Are there any plans to upgrade the fedora kernels to overcome this problem, which results in a blank screen most of the time? Is it possible for me to download the fedora kernel source and try patching the present fedora kernel ( currently: 4.7.3-200.fc24.x86_64 ? With thanks, Couran.

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answered 2016-09-19 13:27:13 -0500

ssieb gravatar image

It most likely won't be included in the official Fedora kernel until the patch is accepted upstream. You could check in bugzilla to see if there is a bug filed on it. Your best option would be to download the kernel source package from and build your own rpm with the patch included. Just remember that if you have a UEFI system, you will have to disable secure boot or go through the process to sign it yourself and add your key to the boot system.

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Asked: 2016-09-18 18:50:26 -0500

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Last updated: Sep 19 '16