USB2 support basically requires a 2.6 kernel... Its like USB in 2.2... Essentially "don't bother" or a stack of patches and patches to patches.
In 2.6.7 USB2 works nicely for me. -----Original Message----- From: Volker Kuhlmann [mailto:[EMAIL PROTECTED] Sent: Wednesday, 14 July 2004 10:33 a.m. To: [EMAIL PROTECTED] Subject: Re: USB cards + Linux Continuing an old thread on additional USB ports, and leaving the arguments PCI card vs hub out. The 4-port USB 2.0 PCI card from TasTech ($20) has a Via VT6202 chip on it and presents itself as 3 PCI devices (which is standard for these cards). 00:0c.0 USB Controller: VIA Technologies, Inc. USB (rev 50) 00:0c.1 USB Controller: VIA Technologies, Inc. USB (rev 50) 00:0c.2 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 51) USB 1.1 devices work fine, 2.0 devices do not at least under SuSE 8.2 kernel 2.4.20. Symptoms are I/O hangs with difficulty killing the process, and possibly interference with the IDE disks (it caused at least one disk error and a RAID resync for me). The card needs 3 interrupts and they get spread evenly around by the BIOS ("no pnp OS" setting) and shared with other devices. Turning USB interrupts off in the BIOS deadens USB totally. The mobo USB can't be disabled separately. The disk problem might well be related to interrupt problems but I don't see how I can assign them differently. Assigning interrupts to PCI slots in the BIOS has no effect. Indication is that the ehci-hcd module is flaky unless one has very recent kernel versions. Other USB chips(ets) don't seem to cause as many problems. A Knoppix 3.4 doesn't load the ehci-hcd module automatically and doesn't run attached devices as 2.0 (a bit of a laugh really). Manually loading module ehci-hcd doesn't cause the USB 2.0 device to be attached to the 2.0 bus but does noticably increase at least read transfer rates. Not satisfactory. That's the state so far. The problems are likely to be similar with mobo-integrated USB 2.0. Volker -- Volker Kuhlmann is possibly list0570 with the domain in header http://volker.dnsalias.net/ Please do not CC list postings to me.
