Further testing Broadcom 4331 reset quirk to prevent IRQ storm patch
testing reveals that:
1. quirk is run on initial boot up and this time appears to have
vastly reduced the interrupts (only 81 this time):
cat /proc/interrupts| grep 17
17: 81 0 0 0 0 0
0 0 IO-APIC-fasteoi snd_hda_intel
2. But it is apparently *NOT* run after a suspend/resume and we get
the problem:
17: 100084 0 0 0 0 0
0 0 IO-APIC-fasteoi snd_hda_intel
Rebooting a further nine times shows the low number (below 100) only
happens around 1/3 of the times:
boot #2
17: 38706 0 0 0 0 0
0 0 IO-APIC-fasteoi snd_hda_intel
boot #3
17: 87 0 0 0 0 0
0 0 IO-APIC-fasteoi snd_hda_intel
LOC: 2494 2031 2094 1831 1157 1171
1573 1271 Local timer interrupts
boot #4
17: 50616 0 0 0 0 0
0 0 IO-APIC-fasteoi snd_hda_intel
boot#5
17: 26454 0 0 0 0 0
0 0 IO-APIC-fasteoi snd_hda_intel
boot#6
17: 34440 0 0 0 0 0
0 0 IO-APIC-fasteoi snd_hda_intel
boot#7
17: 79 0 0 0 0 0
0 0 IO-APIC-fasteoi snd_hda_intel
boot#8
17: 84 0 0 0 0 0
0 0 IO-APIC-fasteoi snd_hda_intel
boot#9
17: 37054 0 0 0 0 0
0 0 IO-APIC-fasteoi snd_hda_intel
boot#10
17: 24648 0 0 0 0 0
0 0 IO-APIC-fasteoi snd_hda_intel
Is there an easy setpci command to stop this we can add to grub?
Presently I have a grub work around for black screen as described here:
http://askubuntu.com/questions/264247/proprietary-nvidia-drivers-with-efi-on-mac-to-prevent-overheating/613573#613573
which basically involves adding a grub scriptlet to enable PCI-E bus
mastering on graphics cards:
In /etc/grub.d/01_enable_vga.conf:
setpci -s "00:01.0" 3e.b=8
setpci -s "01:00.0" 04.b=7
Can we do some similar magic setpci commands to disable 04:00.0
which is my BCM4331
lspci | grep 4331
04:00.0 Network controller: Broadcom Corporation BCM4331 802.11a/b/g/n (rev 02)
On 7 April 2016 at 22:04, Andrew Worsley <amworsley@xxxxxxxxx> wrote:
> Sorry but testing the patch shows no difference.
>
> I have just compiled debian jessie kernel 3.16.7-ckt25 and booted it
> and hibernated it twice, then did the same with your patch applied.
> There appeared to be no difference
>
....
Thanks for any suggestions
Andrew
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