Bug 21182

Created attachment 35102 [details]
dmesg with EHCI enable and usb-storage denied

I'v got the same problem. 

2.6.35 was OK, and with 2.6.36 all high speed usb 2.0 devices (SD card reader and the webcam, I think) stopped working.

Maybe interesting: I'm using the same machine as the original reporter, an Apple MacBookPro7,1 (13").

Here are some details from my dmesg:

[    7.444034] usb 1-6: new high speed USB device using ehci_hcd and address 2
[    7.700080] usb 1-6: unable to read config index 0 descriptor/start: -71
[    7.700115] usb 1-6: chopping to 0 config(s)
[    7.764080] usb 1-6: string descriptor 0 read error: -71
[    7.764108] usb 1-6: New USB device found, idVendor=05ac, idProduct=8507
[    7.764110] usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    7.764156] usb 1-6: no configuration chosen from 0 choices
[    7.876035] usb 2-1: new high speed USB device using ehci_hcd and address 2
[    8.132081] usb 2-1: unable to read config index 0 descriptor/start: -71
[    8.132114] usb 2-1: chopping to 0 config(s)
[    8.196080] usb 2-1: string descriptor 0 read error: -71
[    8.196108] usb 2-1: New USB device found, idVendor=05ac, idProduct=8403
[    8.196110] usb 2-1: New USB device strings: Mfr=3, Product=4, SerialNumber=2
[    8.196154] usb 2-1: no configuration chosen from 0 choices

Created attachment 35432 [details]
lsusb -v output

lsusb -v reports some errors:

can't get device qualifier: Protocol error
can't get debug descriptor: Protocol error
cannot read device status, Protocol error (71)

lsusb -t segfaults

I face the same problem on a MacBookAir3,1. But for me it happens on every USB device i plug into the USB ports.

It is also present in 2.6.37-rc1-git11.

Created attachment 37282 [details]
EHCI disable ppc and lpm on MacBookAir3,1(2)

Looks like PPC and LPM does not work on the MacBookAir3,1(2). It seems also other MacBook's with the Nvidia chipset are affected by this problem.

*** Bug 23192 has been marked as a duplicate of this bug. ***

Created attachment 37702 [details]
simpler, corrected patch

(In reply to comment #6)
> Created an attachment (id=37282) [details]
> EHCI disable ppc and lpm on MacBookAir3,1(2)

There are a few problems with this patch:

1. ->has_use_ppcd is not initialized anywhere, so it's gonna always be zero, for all hardware, not just the problematic chipset.

2. The chipset check is too late; with #1 corrected, ppcd will get disabled after ehci_init() gets called.  This probably isn't a problem, since nothing is done with ehci->command in ehci_init().  Actually, can probably just do away with ->has_use_ppcd entirely.

3. Not a big deal, but there's no need to blacklist 0x0d9c, as that's the OHCI controller, not EHCI.

I tested the early one and it's work on affected MBA.

I will test the update as soon as possible.

Can confirm that the new patch works fine on my MacBookAir3,1.

Can someone submit the patch to linux-usb@vger.kernel.org so that it can
be reviewed and applied properly?

(In reply to comment #11)
> Can someone submit the patch to linux-usb@vger.kernel.org so that it can
> be reviewed and applied properly?

Er, crap, I just accidentally sent to linux-kernel.  Sorry about that; I'll send to linux-usb as well.

This latest patch fixes ticket #23312 as well.

Handled-By : Brian Tarricone <brian@tarricone.org>
Patch : https://bugzilla.kernel.org/attachment.cgi?id=37702

*** Bug 23312 has been marked as a duplicate of this bug. ***

Attachment 37702 [details] was merged as commit a85b4e7f4481c5a1ca89fa63c9c871151965075e in 2.6.37