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Date: Tue, 28 Oct 2014 19:19:49 -0400
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To: Peter Harrison <four.harrisons@googlemail.com>
Subject: Re: High interrupt CPU in top...
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On 10/28/14 18:37, Peter Harrison wrote:

> 
> Here's vmstat-i with Xorg running:
> 
>  interrupt                          total       rate
> irq1: atkbd0                         139          1
> irq9: acpi0                          835          7
> irq12: psm0                         1746         15
> irq16: uhci3                    20622511     177780
> irq20: hpet0 uhci0                118696       1023
> irq21: uhci1                          11          0
> irq23: ehci0                           2          0
> irq257: hdac0                       3495         30
> irq258: iwn0                       13406        115
> irq259: ahci0                       8639         74
> irq260: vgapci0                     1979         17
> Total                           20771459     179064
> 
> And without Xorg running:
> 
> interrupt                          total       rate
> irq1: atkbd0                         150          3
> irq9: acpi0                          378          9
> irq20: hpet0 uhci0                  8303        202
> irq21: uhci1                          11          0
> irq23: ehci0                           2          0
> irq257: hdac0                         61          1
> irq258: iwn0                        1536         37
> irq259: ahci0                       1634         39
> Total                              12075        294
> 
> So X is the problem? What can I do to fix it?
> 
> Cheers,
> 
> 
> 
> Peter Harrison.
> _______________________________________________
> freebsd-questions@freebsd.org mailing list
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> 


Try adding the kernel tunable "hw.drm.msi=0" (without quotes) to your
/boot/loader.conf file and reboot.  Check vmstat -i with xorg running.
If it works, fine - that addition will persist.  Of course, if it
doesn't work, remove that line.