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

[Ming Lei]

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

[Ming Lei (tom-leiming)]

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,

[Boren Zhang (bobo-324)]

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

[Chris Van Hoof (vanhoof)]

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.

[Ming Lei (tom-leiming)]

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,

[Dave Cheney (dave-cheney)]

Still not fixed as of version 1.7 of the installer

[Chris Van Hoof (vanhoof)]

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