Messages in this thread | | | From | Oliver Neukum <> | Subject | Re: Linux 3.8-rc1 - another regression on USB :-( | Date | Wed, 16 Jan 2013 09:25:55 +0100 |
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On Tuesday 15 January 2013 23:26:20 Woody Suwalski wrote:
> The modules are insmoded in a fixed order: > usb-common, usbcore, xhci-hcd, ehci-hcd, uhci-hcd, ohci-hcd, usbhid, > usb_storage,... > > If all USB is built as modules - I get read errors from USB drives when > accessing squash image, boot fails. > If usb-common and usbcore are built in, system seems to crawl with a > very slow USB, but boots. That could be caused by timing between hcd > modules.
Have you checked which bus the storage device is on? If it is attached to a companion controller that would explain the speed issue.
> If usb-common, usbcore and ehci-hcd are built-in, all works OK like > "before 3.8". > I was testing on machines without xhci or ohci hardware, so these > drivers probably are not playing any role. > I have retried initramfs with a 1s sleep between insmods to verify if it > is timing - still the same read errors - so the main issue is _not_ timing. > The read errors problem is 100% reproducible for me, the blocks where > read fails are not fixed - every (failed) boot errors start appearing in > a bit different location.
Do you get read errors on the SCSI level only or also errors on the USB level?
Regards Oliver
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