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On 04/10/2013 23:52, Walter Dnes wrote: |
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> On Fri, Oct 04, 2013 at 09:35:33PM +0200, Alan McKinnon wrote |
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> |
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>> OHCI is a USB 1.1 implementation, I can't imagine why you have it |
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>> loaded. Surely you do not have USB 1 only hardware? USB2 deals with that |
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>> nicely. It is possible that you have a shit storm of USB weirdness going |
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>> on and this in locking up the desktop. Try disabling USB stuff you don't |
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>> need and see what gives. |
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> |
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> Do *NOT* remove lowspeed USB driver... unless you have a rescue USB |
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> stick boot handy. I tried that a few years ago and found that my USB |
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> keyboard and mouse stopped working. UHCI is used by Intel and VIA cpus, |
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> according to the help in "make menuconfig". AMD may be OHCI, I don't |
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> know. |
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> |
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|
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It depends on the hardware on the motherboard, not on the CPU. Different |
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cpus for the most part have matching chipsets and the USB implementation |
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is in the chipset. USB1 had two implementations - uhci and ohci. |
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|
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If you have hardware that is usb1 only, then you need those drivers. |
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These days, that is rare. These days, most motherboards have lots of |
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usb2 ports and when you plug in a keyboard, they run in usb1 mode but |
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still use the ehci driver to do it. I have a usb1 keyboard and mouse |
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plugged into this laptop right now: |
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|
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$ lsmod | grep -i \[uo\]hci |
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firewire_ohci 31868 0 |
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firewire_core 50381 1 firewire_ohci |
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$ lsmod | grep -i ehci_hcd |
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ehci_hcd 38782 1 ehci_pci |
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usbcore 152800 7 |
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btusb,uvcvideo,usb_storage,ehci_hcd,ehci_pci,usbhid,xhci_hcd |
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|
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No [uo]hci. And the only machine I have left with usb1-only hardware |
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dates from 2004, everything else uses only ehci and the lowspeed drivers |
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are not even built. |
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|
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Dale changed his motherboard recently, presumably he knows what his |
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chipset offers |
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|
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-- |
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Alan McKinnon |
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alan.mckinnon@×××××.com |