On Sat, 2012-08-11 at 22:06 -0700, Robert Wall wrote: > Package: src:linux > Version: 3.2.21-3 > Severity: normal > > Dear Maintainer, > > My USB hard disk's write speed is slow (about 1MB/s) when I first boot > Debian. It speeds up if I issue "rmmod ehci_hcd; rmmod uhci_hcd; > modprobe ehci_hcd; modprobe uhci_hcd", to about 26MB/s. I suspect the > issue is that uhci_hcd is being used instead of ehci_hcd because it's > loaded first during boot, and it's limited to USB 1's maximum of > 12Mb/s (which is close to the 1MB/s I was seeing). > > I'd expect the system to autodetect whether it can use EHCI and prefer > it if possible, or some other behavior more smart than defaulting to > UHCI. Yes, this is supposed to happen automatically. > This issue recurs after reboot and is consistently reproducible. [...] Can you test whether this also happens in Linux 3.5 (packaged in experimental)? Can you provide the boot log (/var/log/dmesg) showing the initial detection of the USB interfaces and hard disk? Ben. -- Ben Hutchings Sturgeon's Law: Ninety percent of everything is crap.
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