LinuxQuestions.org - USB 2.0 ports: devices not detected, but works fine with USB 1.1 ports (Kubuntu 6.06)

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USB 2.0 ports: devices not detected, but works fine with USB 1.1 ports (Kubuntu 6.06)

I tried going through the forums, but didn't find threads describing my situation, which is:

I newly installed USB 2.0 ports on my Kubuntu (6.06 Dapper) desktop. When I plug in devices (e.g. SD/CF card reader), they are not detected. However, on the same computer, if I plug the same devices into the USB 1.1 ports, then they are detected, Kubuntu shows them under "media:/", I can mount them and read/write.

"dmesg" shows EHCI detected. "lsmod" shows "usb_storage", "ehci_hcd", etc. "lshal" output mentions "USB 2.0", but I'm not that familiar with the "lshal" output". Let me know if you need the output from any command pasted.

What should be my next step to find out why USB 1.1 works but USB 2.0 doesn't? I need to get this installed so I can back up my hard drive onto a removable drive, at reasonable speed.

Thanks for any advice.

Maybe you need to modprobe a kernel module:

Code:

jschiwal@hpmedia:~> lsmod | grep usb

usbhid                69792  0

usb_storage          105280  4

usbcore              148064  6 uhci_hcd,usbhid,usb_storage,ohci_hcd,ehci_hcd,ndiswrapper

scsi_mod              173744  5 sr_mod,usb_storage,sg,libata,sd_mod

ide_core              174720  5 usb_storage,ide_cd,siimage,amd74xx,ide_disk

jschiwal@hpmedia:~> lsmod | grep hcd

uhci_hcd              42520  0

ohci_hcd              38404  0

ehci_hcd              51080  0

usbcore              148064  6 uhci_hcd,usbhid,usb_storage,ohci_hcd,ehci_hcd,ndiswrapper