Re: Unreliable USB3 with NEC uPD720200 and Delock Cardreader

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Ulrich Eckhardt <usb@...> writes:

> 
> Am 24.10.2012 22:18, schrieb Bjorn Helgaas:
> > On Tue, Oct 23, 2012 at 11:14 AM, Ulrich Eckhardt <usb <at> uli-eckhardt.de>
wrote:
> >> Am 23.10.2012 01:40, schrieb Sarah Sharp:
> >>> On Sun, Oct 21, 2012 at 06:03:24PM +0200, Ulrich Eckhardt wrote:
> >>
> >>>> I have tested it with Kernel 3.6.2. The USB3 port is the one built
> >>>> in the Mainboard M4A87DT EVO.
> >>>
> >>> Did a previous kernel version work?
> >>
> >> Yes, I tried the Kernel shipped with OpenSUSE (3.4.11) several 3.5 and all
> >> available 3.6 kernel versions.
> >
> > I assume you mean that every kernel you tried failed?  If some
> 
> Sorry for the confuion, yes you are right, I had never success on using 
> USB3 with the cardreader with any kernel.
> 
> Uli


I am having problem with Transcend USB3 cardreader (TS-RDF8W, identified 
as Genesys GL3220 in dmesg output);
The system is Fedora 16 (kernel 3.6.5) on ASUS Crosshair IV Formula motherboard
 with on-board  USB3 NEC 
( NEC Corporation uPD720200 USB 3.0 Host Controller (rev 03) )
Cardreader works fine when connected to an USB2 port;
To get it working reliably (but slow!) when connected to USB3 port,
 I must reduce 
/sys/block/sdX/device/max_sectors
 setting from default 240 to 127 or less;
128 or more give errors (sdX stands for name assigned to the device, e.g. sde)

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