Red Hat Bugzilla – Bug 467577
USB full speed devices fail with recent kernel
Last modified: 2009-11-18 11:58:24 EST
Full speed (ehci) devices are not working for me under 22.214.171.124-23.rc1.fc10.x86_64
Sames devices work fine with kernel-2.6.27-0.352.rc7.git1.fc10.i686
Error is a timeout:
Oct 19 09:24:47 i kernel: usb 2-5: device descriptor read/64, error -110
Oct 19 09:25:03 i kernel: hub 2-0:1.0: unable to enumerate USB device on port 5
Oct 19 09:25:13 i kernel: uvcvideo: Failed to query (135) UVC control 2 (unit 2)
: -110 (exp. 2).
Sometimes (not always) the kernel decides to drop back to full speed (OHCI) which then works.
Hardware is AMD 790GX / SB750 chipset:
00:12.2 USB Controller [0c03]: ATI Technologies Inc SB700/SB800 USB EHCI Controller [1002:4396]
00:13.0 USB Controller [0c03]: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller [1002:4397]
Most likely interrupt routing went bad (these days it's governed by
ACPI tables). Please capture dmesg with dmesg > ok.dmesg for
2.6.27-0.352.rc7.git1.fc10 and dmesg > bad.dmesg for 126.96.36.199-23.rc1.fc10,
then attach both. It should give us a clue where the difference is.
The /var/log/messages may miss some information, I think dmesg is better.
Chuck, I'm not taking this bug yet, I know about IRQ routing as much as
a pig knows about oranges.
Created attachment 320780 [details]
dmesg from current (broken) kernel
Created attachment 320781 [details]
Dmesg from older working kernel.
Interestingly, current i686 kernel (188.8.131.52-23.rc1.fc10.i686) does seem to work.
So it looks like the difference is i686 v. x86-64.
This bug appears to have been reported against 'rawhide' during the Fedora 10 development cycle.
Changing version to '10'.
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Has been working again for ages.