On 16/09/2010 12:50 ÎÎ, vasos wrote:
On 15/09/2010 06:10 ÎÎ, Don Dutile wrote:
vasos wrote:
Hello,
i wish to report a strange issue that my machine experiences with a
NEC USB 3.0 PCI-Express (x1 slot) controller. Normally the controller
uses the xhci (usb3) kernel driver.
Now the machine is running
Linux xxxx 2.6.35.4 #2 SMP Wed Sep 1 10:15:04 UTC 2010 x86_64 GNU/Linux
Note that this issue was present in 2.6.34 and 2.6.33 but i though that
it might get fixed in the meantime.
The issue
----------
The controller is sometimes detected and some times not. I mean that at
some boots it
is present as a PCI device (listed in pci -v as
05:00.0 USB Controller: NEC Corporation Device 0194 (rev 03)
(prog-if 30)
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at febfe000 (64-bit, non-prefetchable) [size=8K]
Capabilities: [50] Power Management version 3
Capabilities: [70] MSI: Enable- Count=1/8 Maskable- 64bit+
Capabilities: [90] MSI-X: Enable- Count=8 Masked-
Capabilities: [a0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Device Serial Number ff-ff-ff-ff-ff-ff-ff-ff
Capabilities: [150] #18
Kernel driver in use: xhci_hcd
)
and some other times it just does not exist.
Maybe it is PCIe express related. Also people on linux-usb mailing list
suggested this.
I include 2 full dmesg logs ziped due to the size as well a unified
diff
of them.
NOTE that "echo 1> /sys/bus/pci/rescan" does not do anything.
Please cc the replies if any to the sender email (noxelia ...)
Is this x1 device in a x4 (or higher xN) slot?
I've seen x4 slots not lane-(width) sync with x1 NICs in some systems
(even though the PCIe spec says it should), esp. if one resets the
device
after boot (i.e., flr reset).
If so, try the card in a x1 slot& see if the problem goes away.
The card fits exactly on the x1 slot (the smallest possible).
Thanks
vasil
Hello,
i want to note that the issue has been resolved after i moved the pcie
x1 expansion card from one x1 slot to another x1 slot. The MB has 2 x1
slots and 1 x16 (i think) slot.
Vasil
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
