I've located the bug more closely: after installing ubuntu-minimal for 13.04, i386 system from scratch and booting into it I found no issue with IO speed. (hurray!) Then I "apt-get install ubuntu-desktop" and the issue appeared again. After purge'ing and install'ing packages from 'ubuntu-desktop' - 'ubuntu-minimal' set I found the guilty: lightdm package.
So: - if I boot without starting lightgm service (GUI) then everything is ok (see the process list `ps aux` = 'good_ps.lst' file) - then I start lightdm (initctl start lightdm) and that dd command is that slow (see the process list 'bad_ps_lightdm.lst') - then I stop lightdm (initctl stop lightdm) and that dd command is that slow still (see the process list 'bad_ps_after_lightdm.lst'); killing userspace processes doesn't help either (only reboot helps). Any ideas? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1264707 Title: IO limit 1.2 MB/s for 32bit ubuntu (after running lightdm service) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1264707/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs