Yes I have, and to elaborate further, when I initially installed ubuntu, I immediately attached an external 500 GB drive to one of the front USB ports and it worked fine for quite a while (weeks), at some point later I turned off my system and disconnected the external drive for a day or two, and later rebooted and used the system without the external drive connected. At some point I needed to copy some files off to the external drive and reconnected it to the same USB port as used previously and encountered problems copying a large number of files to it, as described in the original post. I tried cleaning the USB socket, using the 2nd socket, both of which failed, and eventually I found one of the rear 2 sockets to work reliably, and I continue to use it currently. I also have WinXP on the same computer and booting it allows me to use any USB socket reliably with a USB 2.0 device. I have rebooted ubuntu several times and can no longer use any of the other 3 USB ports reliably with it running, except I find I can often copy small files to a memory stick with no problem, but not large files which are slightly over 1 GB. They appear to copy about 3/4 complete, but are less than 1/4 complete on the memory stick. lspci show the following: 00:00.0 Host bridge: VIA Technologies, Inc. VT8378 [KM400/A] Chipset Host Bridge 00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge 00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80) 00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80) 00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80) 00:10.3 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 82) 00:11.0 ISA bridge: VIA Technologies, Inc. VT8235 ISA Bridge 00:11.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06) I have no idea if this is what it would have displayed when all was working well, and the manual for my motherboard shows specs for a VIA VT8235 South Bridge, containing an integrated USB 2.0 controller supporting 6 ports, although I only have connections for 4, the motherboard lacks pins where the additional 2 ports could be added. The manual states the motherboard provides two USB 2.0 pin headers, labeled JUSB2/3 that are compliant with Intel I/O connectivity Design Guide. JUSB2 is where the front 2 USB sockets are connected, and I've removed cleaned and reconnected the header. JUSB3 lacks pins on the motherboard. The only mention of USB 1.1 in the manual is in reference to USB 2.0 being 40 times faster. It would appear to me that something must have changed when the system was rebooted after the initial install as the problem only appeared after rebooting Ubuntu 7.04. I don't know where else to look for any info that might have relevance to this problem, and if there is something I can do or look at, such information would be greatly appreciated.
-- USB ports unreliable https://bugs.launchpad.net/bugs/246608 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
