ubuntu-nexus7

zenity consumes about 100% CPU when installing Ubuntu on nexus 7

Bug #1077973 reported by Ming Lei
16
This bug affects 3 people
Affects Status Importance Assigned to Milestone
ubuntu-nexus7
Confirmed
Wishlist
Chris Van Hoof

Bug Description

top - 23:10:25 up 3 days, 14:08, 12 users, load average: 2.94, 2.59, 1.53
Tasks: 302 total, 5 running, 295 sleeping, 0 stopped, 2 zombie
Cpu0 : 18.9%us, 7.8%sy, 0.0%ni, 73.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu1 : 63.6%us, 36.4%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu2 : 60.4%us, 28.4%sy, 0.0%ni, 10.6%id, 0.7%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu3 : 67.2%us, 32.8%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 3711848k total, 3440916k used, 270932k free, 72220k buffers
Swap: 3905532k total, 654676k used, 3250856k free, 678772k cached

  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
18213 tom 20 0 407m 19m 14m R 100 0.5 13:36.81 zenity
18499 tom 20 0 407m 19m 14m R 99 0.5 7:50.64 zenity
18380 tom 20 0 407m 19m 14m R 98 0.5 8:56.89 zenity
 9641 tom 20 0 1364m 135m 9476 S 4 3.7 75:03.35 chrome
10587 tom 20 0 419m 38m 5732 S 3 1.1 56:39.52 skype

See original description
Ming Lei (tom-leiming)
description: updated
Matt Fischer (mfisch)
Changed in ubuntu-nexus7:
status: New → Confirmed
importance: Undecided → Low
status: Confirmed → Triaged
Revision history for this message
Ming Lei (tom-leiming) wrote :

Also it is quite slow to install ubuntu in China, and basically the speed is about 4KB/sec, so looks
it is quite difficult to play ubuntu on nexus 7 for Chinese guys.

So is there any way to support downloading ubuntu images(boot.img, rootfs.img, kernel.img) offline
and installing them manually?

Thanks,

Revision history for this message
Boren Zhang (bobo-324) wrote :

http://hwe.ubuntu.com/uds-r/nexus7/
I find this website to download image
I put all files in ~/Downloads/UbuntuNexus7

Revision history for this message
Chris Van Hoof (vanhoof) wrote :

Hi Ming -- If you have a cycle or two have a look here:

http://unix.stackexchange.com/questions/16760/why-is-piped-input-okay-to-zenity-but-file-malfunctions

I'll look to see if another solution could be used which is a bit more relaxed CPU wise.

Changed in ubuntu-nexus7:
assignee: nobody → Ming Lei (tom-leiming)
Revision history for this message
Ming Lei (tom-leiming) wrote :

Hi Chris,

Looks it isn't same with the problem in the above link, in which there is no the cpu 100% problem when
running 'program | zenity', but your script always takes the trick of pipe.

Thanks,

Chris Van Hoof (vanhoof)
Changed in ubuntu-nexus7:
assignee: Ming Lei (tom-leiming) → Chris Van Hoof (vanhoof)
Revision history for this message
Dave Cheney (dave-cheney) wrote :

Still not fixed as of version 1.7 of the installer

Revision history for this message
Chris Van Hoof (vanhoof) wrote :

This is a result of directing STDIO/STDERR to a pipe to achieve --progress dialog in zenity. Unless I move to --pulsate which does not depict actual progress I'm not sure of a suitable solution. Code is available here if you have suggestions:

http://kernel.ubuntu.com/git?p=vanhoof/ubuntu-nexus7-installer.git;a=summary

Changed in ubuntu-nexus7:
importance: Low → Wishlist
status: Triaged → Confirmed
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