How to make image file for sd card

[Krishna Sanjay]

Dear sir,

          i have done all process step by step and i am using 16 GB sd card, and i work with ubuntu 12.04 and it is in now in my aakash tablet. sir my question is that, my sd card has two partition one is 16mb for boot loader and second for rootfs 16 GB, sir i want to ask you how did you made image file because if want to install it i have to follow all process again that is way i want to make a image file using this two partition.

Thank you.

[Manoj Gudi]

On Feb 14, 2015 2:50 PM, "Krishna Sanjay" <cris...@gmail.com> wrote:
>
> Dear sir,
>
>           i have done all process step by step and i am using 16 GB sd card, and i work with ubuntu 12.04 and it is in now in my aakash tablet. sir my question is that, my sd card has two partition one is 16mb for boot loader and second for rootfs 16 GB, sir i want to ask you how did you made image file because if want to install it i have to follow all process again that is way i want to make a image file using this two partition.

I don't follow your question, can you perhaps rephrase?
We usually make images using 'dd' command.. Do 'man dd' in terminal to know more
>
> Thank you.
>
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[Krishna Sanjay]

sir
 i used dd command but my problem is that i have two partition in my sd card and how can i take back up in one image file and restore it same formate.

[Srikant]

1) You can use 'dd command' to take backup of your entire sdcard or one partition too

2) You can restore the backed up partition using dd again

Please give errors or debug messages too.

On Tue, Feb 17, 2015 at 1:24 PM, Krishna Sanjay <cris...@gmail.com> wrote:

sir
 i used dd command but my problem is that i have two partition in my sd card and how can i take back up in one image file and restore it same formate.

--

[Krishna Sanjay]

sir nothing is showing in aakash tablet only blank screen not even boot screen also

[Krishna Sanjay]

sir i did and i used dd command also for backup and restore a image file but after restoring the image file, sd card not showing on my Desktop,
and it is not working  with aakash also just blank screen showing over in aaksh tablet.

[Srikant]

Can you please list the exact steps you have performed to dd? Please say, step1, step2 and etc. Also, tell us any error or debug message you received while dd.

If have to first untar that bz2 file, and then dd the img file. If you still have issue with dd, you may use ddmaker, a small youtube video is also available

On Tue, Feb 17, 2015 at 3:16 PM, Krishna Sanjay <cris...@gmail.com> wrote:

sir nothing is showing in aakash tablet only blank screen not even boot screen also

--

[Srikant]

You sdcard is gone bad it seems. You haven't performed dd correctly, you have to dd the img file not the bz2 file.

On Tue, Feb 17, 2015 at 3:19 PM, Krishna Sanjay <cris...@gmail.com> wrote:

sir i did and i used dd command also for backup and restore a image file but after restoring the image file, sd card not showing on my Desktop,
and it is not working  with aakash also just blank screen showing over in aaksh tablet.

--

[Krishna Sanjay]

sir sd card is ok and running also,
sir when i am usind disk image writer their i am facing one problem you need 50 mb more space in your sd card to write. but sir i took 16gb card backup and restoring it 16 gb then what is the problem.

[Srikant]

I don't know what is the exact issue. Sorry.

I haven't used disk image writer.

On Tue, Feb 17, 2015 at 3:26 PM, Krishna Sanjay <cris...@gmail.com> wrote:

sir sd card is ok and running also,
sir when i am usind disk image writer their i am facing one problem you need 50 mb more space in your sd card to write. but sir i took 16gb card backup and restoring it 16 gb then what is the problem.

--

[Krishna Sanjay]

Dear sir,
1. i used your uboot and kernel installation process after that i installed 12.04 instead of 12.10 because it has problem with source.list file,
and after chroot i install gcc and nano for c proramming and i didn't install anything like Desktop and any network manager, and after that i have checked with aakash tablet and i success to do this but i am just working on console (Terminal) mode only because i didn't install Desktop.
2. sir for this all process i have done with two partition on my 16 gb sd card sdc1 sdc2. and i also took backup only with sdc,
  and when i am going to restore it in another 16GB card
dd if=ubutnuSd.img of=/dev/sdc bs=4M
it is working and it is not showing any error but when i am using it on aakash tablet it doesn't showing only black screen over here.

[Krishna Sanjay]

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[Krishna Sanjay]

after restore process i am getting this error with mmcblk0p2

and when i am inserting it in aakash tablet then it showing only iit mumbai logo screen only after that it again rebooting

[Srikant]

Do,

sudo fsck -y /dev/mmcblk0p2

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[Krishna Sanjay]

sanjay@crishMania:~$ sudo fsck -y /dev/mmcblk0p2
[sudo] password for sanjay:
fsck from util-linux 2.20.1
e2fsck 1.42.9 (4-Feb-2014)
/dev/mmcblk0p2: recovering journal
The filesystem size (according to the superblock) is 3897088 blocks
The physical size of the device is 3885184 blocks
Either the superblock or the partition table is likely to be corrupt!
Abort? yes

[Krishna Sanjay]

sir i want to install lxde for desktop enviorment but when i am going to install it showing unable to loca

[Manoj Gudi]

Have you perhaps updated your apt?

Also check your apt's sources.list, lxde-core package is in universe repository, do you see anything like this in sources.list?
deb http://us.archive.ubuntu.com/ubuntu/ precise universe                      
deb-src http://us.archive.ubuntu.com/ubuntu/ precise universe   

[Srikant]

Also, let me know how did your fsck command got resolved.

[Krishna Sanjay]

sir i didn' solve it but i know in my mind,  what is the problem because i am using 16 gb sd card and and i am made a backup of it, and after that if i open it one disk image writer for restore it on another 16 gb sd card their showing a error you need more 50 mb. for restore.

sir if i use more then 16gb then it will work.

[Krishna Sanjay]

Get:4 http://us.archive.ubuntu.com precise/universe TranslationIndex [2,922 B]
Err http://us.archive.ubuntu.com precise/universe armhf Packages              
  404  Not Found
Get:5 http://us.archive.ubuntu.com precise/universe Translation-en [4,133 kB] 
Fetched 10.4 MB in 18s (579 kB/s)                                             
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/precise/universe/binary-armhf/Packages  404  Not Found

this error is coming when i add

deb http://us.archive.ubuntu.com/ubuntu/ precise universe                      
deb-src http://us.archive.ubuntu.com/ubuntu/ precise universe   

[Krishna Sanjay]

sir how to install lxdm it is showing unable to locate in ubuntu 12.04 how to solve it sir and if i adding some link in source.list their showimg 404 error

[Srikant]

This is very simple issue. You may want to google it first.

On Wed, Feb 18, 2015 at 7:31 PM, Krishna Sanjay <cris...@gmail.com> wrote:

sir how to install lxdm it is showing unable to locate in ubuntu 12.04 how to solve it sir and if i adding some link in source.list their showimg 404 error

--

[Krishna Sanjay]

sir wifi network not showing in my xfce screen but it showing network connection

[Krishna Sanjay]

Dear si
r how did you enable wifi on aakash tablet i added that drive in module also but it doesn't showing any wifi networks

[Srikant]

Is it use to work in any image? I mean the default 12.10 image which we provided?

If not, the driver may be appropriate. If yes, then you have to give some error report, debug messages and so on.

[Krishna Sanjay]

sir it is not showing any error and i used 12.04 image.

[Srikant]

You misunderstood.

Does wifi icon use to show in 12.10?

[Krishna Sanjay]

sir i am using 12.04 and here not showing any wifi icon but i can see network connction icon with X symbol.

and sir did you write driver for aaksh tablet wifi(not for android , ubuntu 12.10) or it will work if i install wifi driver for ubuntu 12.04 .

[Srikant]

You please answer to my following questions:

1) Did you used Aakash-12.10 image before, and did WiFi worked there?

2) Send us the logs of lsmod and ifconfig -a

On Thu, Feb 19, 2015 at 2:57 PM, Krishna Sanjay <cris...@gmail.com> wrote:

sir i am using 12.04 and here not showing any wifi icon but i can see network connction icon with X symbol.

and sir did you write driver for aaksh tablet wifi(not for android , ubuntu 12.10) or it will work if i install wifi driver for ubuntu 12.04 .

--

[Srikant]

This is what I was asking. The drivers are preinstalled in the 12.10, you need not to do anything else to run wifi. Wifi only work for selected set of devices, your device may be slightly different from ours. Here we can't do much.

On Thu, Feb 19, 2015 at 3:04 PM, Krishna Sanjay <cris...@gmail.com> wrote:

Dear sir

Before ubuntu 12.04 i used 12.10 but it is not working with it's source.list file and in 12.10 i didn't check with desktop screen or wifi, and in 12.04 if i use ifconfig command then there showing only lo

here i can't see eth0 or wlan.

[Krishna Sanjay]

lsmod or ifconfig -a

On Thu, Feb 19, 2015 at 3:04 PM, Krishna Sanjay <cris...@gmail.com> wrote:

Dear sir

Before ubuntu 12.04 i used 12.10 but it is not working with it's source.list file and in 12.10 i didn't check with desktop screen or wifi, and in 12.04 if i use ifconfig command then there showing only lo

here i can't see eth0 or wlan.

On Thu, Feb 19, 2015 at 2:59 PM, Srikant <u.srikan...@gmail.com> wrote:

[Krishna Sanjay]

sir but android is working with wifi in same device then what is the problem with it.

[Manoj Gudi]

Android and *buntu are two different things, though both of the OSes use linux-kernel, the kernel images are isolated and separate..

If it works for android, means the vendor has embedded the proprietary module for wifi in android kernel and shipped it with the tablet.. Driver for your tablet's wifi-module might not have been built in the Ubuntu image we provided..

[Krishna Sanjay]

ok sir i understood it, But what i have to do. any idea.

[Manoj Gudi]

check which is your wifi-module, probably should be listed in output of `lspci`; send us the output

[Krishna Sanjay]

lspci log

On Thu, Feb 19, 2015 at 4:03 PM, Krishna Sanjay <cris...@gmail.com> wrote:

lspci log

[Krishna Sanjay]

Sir can u tell me about, how can i check aakash tablet screen resolution. i used to see /System/build.proc but here i am not able to see the screen resultion.

[Srikant]

You may try these, not sure about aakash though(I'm not using now):

1) cat /sys/class/graphics/fb0/modes

2) xrandr

[Krishna Sanjay]

sir i got that but i having a problem with startx command it showing a error in /var/log/Xorg.0.log

no layout section. using the first screen section.

no screen section available. using default

On Fri, Feb 20, 2015 at 4:21 PM, Krishna Sanjay <cris...@gmail.com> wrote:

sir i got that but i having a problem with startx command it showing a error in /var/log/Xorg.0.log

no layout section. using the first screen section.

no screen section available. using default

[Srikant]

Search for xorg settings for your tablet, or take one from 12.10 image provided by us. It will be in /etc/X11/xorg.conf

[Krishna Sanjay]

Sir,

can u tell me which wifi h/w in aakash tablet?

On Fri, Feb 20, 2015 at 9:52 PM, Krishna Sanjay <cris...@gmail.com> wrote:

sir actually xfce4 instead of lxde.

[Srikant]

I don't recall. I don't have with me now. I suppose it is broadcomm. 

[Krishna Sanjay]

Now open a new tab in your host Linux machine's terminal and copy /<path to linux kernel>/linux-sunxi/out/lib/modules/3.0.76+/ to your arm ubuntu setup

sir after the copy here not showing kernel directory in 3.0.76 dir, and that is why i made new directory over here /kernel/drivers/net/wireless and i installed there 8188eu.ko.

after that for checking it i used

modprob 8188eu

kernel does not have module support how to solve it.

[Srikant]

It is better if you send us the exact terminal outputs.

What I understood is when you do sudo modprobe 8188eu you're getting error, this could be due to following reasons:

1) Mismatch in kernel version (solution: compile the kernel and modules again)

2) Your device doesn't have 8188eu hardware

[Krishna Sanjay]

---------- Forwarded message ----------
From: Krishna Sanjay <cris...@gmail.com>
Date: Mon, Mar 30, 2015 at 11:15 AM
Subject: Re: [linux_on_aakash] Re: How to make image file for sd card
To: Srikant <u.srikan...@gmail.com>

i am sorry sir, i was busy on my Mca 1st sem exam.

but sir i checked with adb shell android /system/vendor/module directory their have 8188eu.ko driver

that is why

[Krishna Sanjay]

Do you have any idea about, How to share ubuntu or amy linux system it's internet to android mobile device.

i am trying with reverse usb tethring but my aakash tablet not working with tethring.

[Srikant]

Try making a wifi hotspot in your linux machine(provided you're connected through LAN on same machine), and use the hotspot connection to android. 

[Krishna Sanjay]

yes sir i know about that, but i want to use internet with usb, 

[Srikant]

I don't know how to do that. Please tell me when you figure it out, seems interesting.