On 26/05/18 23:53, Roger Heflin wrote:
you might try a find /sys -name "rc1*" and see if some piece of hw has
that name.   It may be some driver trying to manage the ir remote
hardware.

When I do it on my machine I get this:
find /sys -name "rc1*" -ls
     33248      0 drwxr-xr-x   5  root     root            0 May  8
15:50 /sys/devices/pci0000:00/0000:00:14.4/0000:04:06.2/rc/rc1
     33252      0 lrwxrwxrwx   1  root     root            0 May  8
15:50 /sys/class/rc/rc1 ->
../../devices/pci0000:00/0000:00:14.4/0000:04:06.2/rc/rc1

lspci | grep -i 04:06
04:06.0 Multimedia video controller: Conexant Systems, Inc.
CX23880/1/2/3 PCI Video and Audio Decoder (rev 05)
04:06.1 Multimedia controller: Conexant Systems, Inc. CX23880/1/2/3
PCI Video and Audio Decoder [Audio Port] (rev 05)
04:06.2 Multimedia controller: Conexant Systems, Inc. CX23880/1/2/3
PCI Video and Audio Decoder [MPEG Port] (rev 05)
04:06.4 Multimedia controller: Conexant Systems, Inc. CX23880/1/2/3
PCI Video and Audio Decoder [IR Port] (rev 05)

modinfo cx88   shows it has a parameter disable_ir

Thanks for this. It led me to 'lspci | grep -i 07:04' and the Philips Multimedia controller SAA7131/SAA7133/SAA7135

Browsing /sys/class/rc/rc1 showed a uevent with NAME = rc-hauppauge, DRV_NAME = ir_kbd_i2c, DEV_NAME = HVR 1110 (now well into its second decade)

and 'sudo modprobe -r ir_kbd_i2c' has stopped the spam.

The only parameter listed for ir_kbd_i2c is 'enable hdpvr:bool'

I suppose, to survive reboots, I should try creating an /etc/modprobe.d/ir_kbd_i2c.conf - or can I simply add another line to /etc/modprobe.d/dvb.conf, which now specifies the adapter numbers? Or blacklist ir_kbd_i2c?

John



Yours may be a cx88 I think they are pretty common or some similar
card.  To find it I did lsmod | grep dvb and then lsmod | grep cx88
and modinfo the various pieces and mine does have a disable for ir.

On Sat, May 26, 2018 at 4:48 PM, John Pilkington <johnpilk...@gmail.com> wrote:
On 26/05/18 21:04, stan wrote:

On Sat, 26 May 2018 13:38:29 +0100
John Pilkington <johnpilk...@gmail.com> wrote:

I just upgraded my kde/f26 system to f27 using dnf.  It seems to be
working well but dmesg has

<timestamp> rc rc1: error -5

repeated around 10 times per second.  ISTR that when I first saw it
it was rc0:

Searching hasn't been much help.   I use MythTV but not the lirc
infra-red remote-control features, and thought it might be
lirc-related, so installed lirc-disable-kernel-rc. But the messages
continue.  They make it impossible to query dmesg for anything else.

/etc/rc.d includes various Kxxx files, and rc-local.service is
'static'

Suggestions please...


No specific idea, but anything writing that often should be visible in
top.  Once you know what program it is, you can use rpm -qf to find
which package it is.

You could also try disabling dmesg logging, and see what complains.
Does anything show up in journalctl -r?


Thanks to both Samuel and stan for your responses.

Yes, there are 2 tuners cards, one PCI and one usb.  The spam continued when
I unplugged the usb device;  I don't want to disable them unless all else
has failed.

I had looked at atop, and can compare what I see with another very similar
'production' box running the same MythTV version under SL7.5. The spam
continues in f27 with MythTV inactive.

systemd-journal and rsyslogd are active; rcu_sched shows up intermittently.
There's also more akonadi activity which I don't knowingly use.

journalctl -r looks as if it ought to be useful but I haven't used it before
on either box.  Before the 26>27 upgrade it looks as if it was almost
exclusively pulseaudio stuff, switching between intel and nvidia for reasons
that were never clear;  now it looks much denser and almost all kde related.

I'll try a reboot and leaving MythTV inactive.
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