I didn't find any hints in the dmesg.
System "reboots" during "shutdown" could be probably due to a panic
during shutdown path. Since you have discovered that USB 3.0 mode
matters, I would suggest you to try to insert and remove xhci module
dynamically during run-time. (Make sure that you have compiled xhci
as a module.)
#lsmod | grep xhci
#rmmod xhci_pci
#modprobe xhci_pci
Does panic happen?
Thanks,
Baolu
On 05/05/2015 12:17 AM, Brian Monroe wrote:
http://fpaste.org/218248/43075468/ dmesg --kernel output after
receiving the bug, this was also put on the bug report. Let me know if
you need any other logs.
On Mon, May 4, 2015 at 8:16 AM, Brian Monroe <briancmonroe@xxxxxxxxx> wrote:
It's on Fedora 21 (though it was present in Fedora 20 as well) there's
a bug report with Redhat's bugzilla in the description. I don't think
those commands will work on my system, but I'll get it straightened
out and get back to you on the usbcore and xhci logs.
On Mon, May 4, 2015 at 8:14 AM, Brian Monroe <briancmonroe@xxxxxxxxx> wrote:
It's on Fedora 21 (though it was present in Fedora 20 as well) there's a bug
report with Redhat's bugzilla in the description. I don't think those
commands will work on my system, but I'll get it straightened out and get
back to you on the usbcore and xhci logs.
On Sun, May 3, 2015 at 6:40 PM Lu, Baolu <baolu.lu@xxxxxxxxxxxxxxx> wrote:
Hi Brian Monroe,
On which platform did you see this problem?
Do you have any kernel messages when this problem happens?
It should be more helpful if we have kernel messages with usbcore and
xhci dynamic debug enabled.
"usbcore" and "xhci" dynamic debug could be enabled with below commands.
# echo -n 'module xhci_hcd =p' > /sys/kernel/debug/dynamic_debug/control
# echo -n 'module usbcore =p' > /sys/kernel/debug/dynamic_debug/control
Thanks,
Baolu
On 04/29/2015 02:23 AM, Brian Monroe wrote:
I filed a bug with kernel.org:
https://bugzilla.kernel.org/show_bug.cgi?id=97391 and Greg
Kroah-Hartman requested that I email this list to advise you of the
issue as well.
There's also a bug that's been filed with Fedora
https://bugzilla.redhat.com/show_bug.cgi?id=1168557 for this issue,
and there's the lspci info from different machines listed there.
The computer will reboot instead of shutting down. We found a work
around when you disable xHCI (and consequently USB3) support in the
BIOS and the bug goes away. This has been present in Version 3.17 and
later in the kernel changes for Fedora 21.
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