Hi again
I still have an issue with the new kernel recognising my weather station. After switching off amd-iommu I was able to connect to the weather station, but each morning shortly after 3am the USB connection is lost and only a reboot restores it.

Dec 28 03:21:54 ferguson kernel: ohci-pci 0000:00:13.0: frame counter not updating; disabled
Dec 28 03:21:54 ferguson kernel: ohci-pci 0000:00:13.0: HC died; cleaning up
Dec 28 03:21:54 ferguson kernel: usb 7-2: USB disconnect, device number 2
Dec 28 03:21:55 ferguson systemd-udevd: error opening USB device 'descriptors' file

I have changed back to the older kernel for now.

Also, I am getting ABRT messages about tracker. See below.

[root@ferguson ~]# abrt-cli list --since 1451259242
id 6c0186ed5e837092c0f71ac51b2eadb31cf59a54
reason:         tracker-miner-fs killed by SIGSEGV
time:           Thu 24 Dec 2015 11:43:51 AEDT
cmdline:        /usr/libexec/tracker-miner-fs
package:        tracker-0.16.2-11.el7
uid:            0 (root)
count:          3
Directory:      /var/spool/abrt/ccpp-2015-12-24-11:43:51-23035

[root@ferguson ~]# 

[System Logs]:
Dec 24 11:43:50 ferguson.maidment.me gnome-session[22614]: (tracker-miner-fs:23035): GLib-CRITICAL **: g_timer_continue: assertion 'timer->active == FALSE' failed
Dec 24 11:43:51 ferguson.maidment.me gnome-session[22614]: (tracker-miner-fs:23035): GLib-GObject-CRITICAL **: g_object_ref: assertion 'G_IS_OBJECT (object)' failed
Dec 24 11:43:51 ferguson.maidment.me gnome-session[22614]: (tracker-miner-fs:23035): GLib-GIO-CRITICAL **: g_output_stream_clear_pending: assertion 'G_IS_OUTPUT_STREAM (stream)' failed
[User Logs]:
Dec 24 11:43:50 ferguson.maidment.me gnome-session[22614]: (tracker-miner-fs:23035): GLib-CRITICAL **: g_timer_continue: assertion 'timer->active == FALSE' failed
Dec 24 11:43:51 ferguson.maidment.me gnome-session[22614]: (tracker-miner-fs:23035): GLib-GObject-CRITICAL **: g_object_ref: assertion 'G_IS_OBJECT (object)' failed
Dec 24 11:43:51 ferguson.maidment.me gnome-session[22614]: (tracker-miner-fs:23035): GLib-GIO-CRITICAL **: g_output_stream_clear_pending: assertion 'G_IS_OUTPUT_STREAM (stream)' failed

Cheers
Bill
 
-----Original message-----
> From:Bill Maidment <[log in to unmask]>
> Sent: Friday 18th December 2015 12:19
> To: Connie Sieh <[log in to unmask]>
> Cc: Pat Riehecky <[log in to unmask]>; [log in to unmask]
> Subject: RE: [SCIENTIFIC-LINUX-DEVEL] Posted for testing: 7.2 security updates (SL7)
> 
> Further investigation on the weather station server has revealed masses of the following errors:
> kernel: AMD-Vi: Event logged [IO_PAGE_FAULT device=00:13.0 domain=0x0008 address=0x0000000000000080 flags=0x0020]
> 
> It would appear the new kernel has picked up the IOMMU error reported in RH bugzilla 1274527
> 
> Cheers
> Bill 
>  
> -----Original message-----
> > From:Bill Maidment <[log in to unmask]>
> > Sent: Thursday 17th December 2015 17:02
> > To: Connie Sieh <[log in to unmask]>
> > Cc: Pat Riehecky <[log in to unmask]>; [log in to unmask]
> > Subject: RE: [SCIENTIFIC-LINUX-DEVEL] Posted for testing: 7.2 security updates (SL7)
> > 
> > Hi
> > I've had a chance to reinstall the new kernel on the problem machine again, and it still kernel panics on boot. This machine has usb keyboard and mouse.
> > I have another machine which refuses to recognize my usb weather station (Bus 005 Device 002: ID 0fde:ca01 Oregon Scientific WMRS200 weather station), but is quite happy on the older kernel.
> > I believe the new kernel has a usb issue.
> > 
> > Cheers
> > Bill
> >  
> > -----Original message-----
> > > From:Connie Sieh <[log in to unmask]>
> > > Sent: Wednesday 16th December 2015 9:57
> > > To: Bill Maidment <[log in to unmask]>
> > > Cc: Pat Riehecky <[log in to unmask]>; [log in to unmask]
> > > Subject: RE: [SCIENTIFIC-LINUX-DEVEL] Posted for testing: 7.2 security updates (SL7)
> > > 
> > > On Tue, 15 Dec 2015, Bill Maidment wrote:
> > > 
> > > > Hi Pat I have tested the updates from sl-testing on several machines and 
> > > > all bar one have not caused any issues. The one issue I had was with an 
> > > > older machine which gives a kernel panic on boot using 
> > > > kernel-3.10.0-327.3.1.el7.x86_64 If I revert to 
> > > > kernel-3.10.0-229.20.1.el7.x86_64 then the machine boots OK and 
> > > > everything runs OK.
> > > >
> > > > I don't have access to this particular machine today, but I will try a 
> > > > reinstall of the new kernel tomorrow (Australian time) and see if I can 
> > > > replicate the issue.
> > > >
> > > > Cheers
> > > > Bill Maidment
> > > >
> > > >
> > > >
> > > Bill,
> > > 
> > > Thanks for testing.
> > > -- 
> > > 
> > > Connie J. Sieh
> > > Computing Services Specialist III
> > > 
> > > Fermi National Accelerator Laboratory
> > > 630 840 8531 office
> > > 
> > > http://www.fnal.gov
> > > [log in to unmask]
> > > 
> > > 
> > 
> > 
> 
>