gonssal (#104): On 13.04 (live CD), I ran "sudo modprobe ehci_hcd" and copied files from an internal SSD to an external USB3 drive. I get super-slow 1 MB/second transfer rates. I boot the same computer into Windows 7 (it's dual boot) and I get 150MB/sec.
I get the same problem if I use eSATA or Firewire (the external drive has all three connections): slow on 13.04, fast on Windows 7. If I boot on a Knoppix 7.2 CD, however... FAST FAST FAST transfer speed. Knoppix is 3.9 kernel, while 13.04 is 3.8. I also tried the Ubuntu nightly build of 13.10 today (kernel 3.11), and it had the same slowness problem as 13.04. I also tried #106 (echo "never" > "/sys/kernel/mm/transparent_hugepage/enabled") and it made no difference. My vendor blames the ASmedia Chipset on my motherboard, which he says Linux has "rudimentary at best" support for. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/500069 Title: USB file transfer causes system freezes; ops take hours instead of minutes Status in The Linux Kernel: Fix Released Status in “linux” package in Ubuntu: Triaged Status in “linux” package in Fedora: Unknown Bug description: USB Drive is a MP3 Player 2GB sbec@Diamant:~$ lsusb Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 002: ID 046d:c50e Logitech, Inc. MX-1000 Cordless Mouse Receiver Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 004: ID 0402:5661 ALi Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub sbec@Diamant:~$ Linux Diamant 2.6.31-15-generic #50-Ubuntu SMP Tue Nov 10 14:54:29 UTC 2009 i686 GNU/Linux Ubuntu 2.6.31-15.50-generic to test, i issued dd command: dd if=/dev/zero of=/media/usb-disk/test-file bs=32 while dd is running i run dstat.... this is in the log file attached. other logs are also in the tar.gz file... there is a huge USB performance Bug report #1972262. this Report is something simular To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/500069/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
