kernel-packages team mailing list archive
Mailing list archive
[Bug 1581651] Re: Xenial desktop unusable under simple I/O through USB
So, at some point I updated the system, and this behaviour stopped
happening; tried a lot to reproduce it, and all that I got is the normal
slowdown when you use disk a lot and try to use an app that suddenly
needs to access disks.
Joseph, Chad, sorry I can not throw more light here, :(
Daniel, it surely was happening with ext3 (I have a big disk through usb
in ext3, where I also saw the behaviour reported here originally).
So, unless you want to continue searching for something around here
(glad to help if I can!), you can close this issue.
Thanks all for the help!
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
Xenial desktop unusable under simple I/O through USB
Status in linux package in Ubuntu:
Status in linux source package in Xenial:
After installing Xenial  I experience the following: when I do I/O through USB (to/from simple pendrives, or an
external HDD I have), the desktop becomes unusable, because it goes very very unresponsive.
With unresponsive I mean:
- all windows go greyed out (like when it's failing to answer in time,
as if the process inside that window locked up)
- firefox and thunderbird start to pop up the typical "the script is taking too much to finis, want to kill
it/continue/etc" (in whatever tab I'll be, so it's not the JS scripts (for once!)
- the mouse pointer goes jumpy, not really following my hand movement
- I see in thee indicator-multiload widget that CPU time is "wasted"
in "waiting i/o"; which I confirmed looking at "top".
So, in short: even while understanding that CPU would wait a little for i/o and that the system will be under a little
load by writing a pen-drive, I find current situation beyond a normal experience.
How can I start to debug this? What I can try? Can I provide you more
 from scratch, in the computer where I always work; I previously
had Trusty here
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-21-generic 4.4.0-21.37
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
USER PID ACCESS COMMAND
/dev/snd/controlC1: facundo 2338 F.... pulseaudio
/dev/snd/controlC3: facundo 2338 F.... pulseaudio
/dev/snd/controlC2: facundo 2338 F.... pulseaudio
/dev/snd/controlC0: facundo 2338 F.... pulseaudio
Date: Fri May 13 16:13:12 2016
InstallationDate: Installed on 2016-04-01 (42 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323)
MachineType: Gigabyte Technology Co., Ltd. GA-970A-D3
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic root=UUID=6ba5d9f5-e21f-4e58-800d-89ec0b7d1e9b ro quiet splash
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.vendor: Award Software International, Inc.
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
To manage notifications about this bug go to: