Turns out the Intrepid standard kernel gives me the disconnects on my main desktop too, although they don't make the machine lose connectivity to the USB drives - things just work slowly for a brief moment and then everything stabilises again. This machine has an nVidia MCP73 chipset.
The max_sectors fix seem however to do the trick, so here is a udev rule that will make udev set the correct max_sectors on all USB drives automatically and while YMMV it does in fact work for me. It seems like the safe thing is to default max_sectors to 128 instead of 240 as it works with more chipsets and doesn't require kernel workarounds. Anyway, drop the following into /etc/udev/rules.d/81-usb_max_sectors.rules and make sure that the SUBSYSTEM line is in fact on one line and not broken into two. # Set max_sectors to 128 for USB HDDs as the default 240 causes problems # SUBSYSTEM=="block", BUS=="usb", KERNEL=="sd*", RUN+="/bin/sh -c 'echo 128 > /sys/block/%k/device/max_sectors'" I need this machine for work purposes so am a little hesitant to try out the jaunty kernel especially since the workaround works and the workaround can be implemented by policy as opposed to waiting for kernel support. -- ehci_hcd module causes I/O errors in USB 2.0 devices https://bugs.launchpad.net/bugs/88746 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
