yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Original Development] jawonder:
Have anyone been able to boot a rom on USB ?, i tried Ubuntu but key board is unresponsive , i tried AOKP and Paranoid and the both won't boot up they are stuck on the Bootanimation for about 20 mins then the screen just goes dead , i have to hold power plus volume to boot back into MultiBoot . Don't know if this could be cause by the fact that i'm using Fat32 .

---------- Post added at 10:41 AM ---------- Previous post was at 10:27 AM ----------

If we could convince "Tasssadar", he would be our best bet to get this working in his MultiBoot . Don't know if he would be able to find the time.
[Nexus 7 Original Development] Tasssadar:
What files are in the backup's folder? There should be files boot.emmc.win, system.ext4.win and data.ext4.win plus their md5. Also, get me /tmp/recovery.log from when you add rom from that backup.

http://www.mediafire.com/?jcriab6i35h7vci

Seems interesting, but also a bit too much "in progress" right now. Anyway, I have to work on something else during christmas holidays, so no, right now I have no time to make this one working.

I like how I say that, yet I am unable to focus on what I need to do, so I end up doing nothing. Oh well.

When you are on the "Booting ROM..." and it gets stuck, restart your device to bootloader via Power button (hold it until is restarts, 10s I think).

When you are in the bootloader, select recovery with volume up/down and press power to select.

After you get into recovery, connect your n7 to computer and type

adb pull /proc/last_kmsg ./kmsg.txt

Get me that kmsg file.

There are some problems with the "setup wizard" right now. Something crashes (you can note that the window's title also disappears). Just restart and try again.

No.

Is the kernel for android ROMs correct?
[Nexus 7 Original Development] jawonder:
Tassssadar i tried with and without the Kernel patch and the same result . Is there something else i should have done ? .
[Nexus 7 Original Development] Tasssadar:
I mean version - aren't you trying to boot 4.2 rom with 4.1 kernel?
[Nexus 7 Original Development] ikslawlok:
Good evening everyone

Thank you for your excellent work.

Is there a possibility to take screenshots of Multiroom?

Like here:

Have a good evening everyone
[Nexus 7 Original Development] Tasssadar:
Yes, just tap with 4 or more fingers at once anywhere in multirom. The screenshots are saved to /sdcard/multirom/screenshot_xx.raw. They are not JPEG or anything, just raw image data in ARGB RGBA format with 800x1280px resolution. You will need something to open those, for example Gimp can do that.

(That's how screenshots from the first post are taken)
[Nexus 7 Original Development] ikslawlok:
thank you a thousand times

I'm trying to create a translation on a forum I care.
[Nexus 7 Original Development] jawonder:
My Internal rom is CM10.1 which is a 4.2 Rom and both unofficial AOKP and Paranoid are 4.2 roms which i'm trying to install on USB . I'm using the 4.2 Kernel patch .
[Nexus 7 Original Development] timedroid:
Looking at the Plasma Active .tar.bz2 file, it appears it doesn't actually have an initrd itself. So we should just be able to specify the root partition via the command line.

Is there any way to tell the kernel it should use /multirom/name in the /data partition as root instead of /data itself using just command line arguments? (For installing it to the internal storage) I haven't been able to find one.
[Nexus 7 Original Development] ikslawlok:
It doesn't work because of Android 4.2

/mnt/shell/emulated/0/multirom/ is empty :(
[Nexus 7 Original Development] timedroid:
I believe he does some stuff to hide the directory (how, BTW?). You should be able to access it through MTP or /data/media/0.
[Nexus 7 Original Development] Rafase282:
Go into recovery then /data/media/0/ (at this point it is the sdcard) then look for whichever dir you need. The multirom dir can only be viewed from recovery and adb shell from recovery.
[Nexus 7 Original Development] ikslawlok:
Yes !

Thank you

adb pull /sdcard/multirom/screenshot_01.raw /media/Android/Nexus7/Recovery/captures_fb0/

then :

ffmpeg -vframes 1 -vcodec rawvideo -f rawvideo -pix_fmt rgba -s 800x1280 -i /media/Android/Nexus7/Recovery/captures_fb0/screenshot_00.raw -f image2 -vcodec png /media/Android/Nexus7/Recovery/captures_fb0/screenshot_00.png

Works Fine :laugh:

By the way :

Great Ping pong game :laugh:

Many many thanks all
[Nexus 7 Original Development] azoller1:
ok i have all star devs 4.1.2 rom on internal, then i got the 13.04 ubuntu image then put it on my flash drive formatted in ntfs type, and i have the modded stock kernel for 4.1 the kxec, and then i try installing the ubuntu image to my usb drive from the drive, it starts then it reboots to recovery then bootloops recovery like 5 times then stays at recovery, is it the ntfs?

EDIT: I just formatted it to fat32 and it worked so ill deal with that for now
[Nexus 7 Original Development] daniel.alomar:
Even worse... :(

Hi Tasssadar,

I was reflashing the recovery and now I am on bootloader and Multirom does not appear. I can just boot to TWRP (2.3.3.0) and if I try to reflash Multirom_v3_n7-signed.zip I get the following error message:

...

MultiROM for Nexus 7

Extracting binaries...

Injecting boot image...

assert failed: run_program("/tmp/inject_boot.sh") == 0

E:Error in /sdcard/Download/multirom_v3_n7-signed.zip

(status 7)

Error flashing zip '/sdcard/Download/multirom_v3_n7-signed.zip'

Updating partition details...

Also I tried to flash no-modified TRPW img with the same result.

If I choose the option "Inject curr. boot sector" following first post instructions, I get the error:

Extracting boot image...

Failed to unpack boot img!

Regarding the inability to boot my internal ROM, I discover my /system folder just contains a bin folder.. it seems it has been erased. Can I copy the files from a Google 4.2.1 factory image?

Regards,
[Nexus 7 Original Development] minipot:
I'm not sure I quiet get when you're meant to install the modified kernels or how can anyone explain without any elaborate techy details how how I'd get a setup whereby I'd have Ubuntu booting from a USB and android on the internal memory of my device? That would be very helpful thanks.
[Nexus 7 Original Development] Tasssadar:
I just tried to install exactly what you have, and it works okay. Dunno what to tell you. What filesystem do you have on the flash drive? What image size did you selected in recovery? Also, maybe the flash drive is not fast enough.

That is what I have to change in Ubuntu, setting some subdirectory as root is not standard feature. I've submiteed it as bug report to ubuntu ( https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1089038 ). Ubuntu has the initrd, though.

chmod 770 multirom
chown root:root multirom

It is done so that MediaScanner will not scan this directory. You cannot got into /sdcard/multirom because of how Android does the /data/media -> /sdcard mounting.

It looks like something went horibly wrong. I recommend you restore from backup or flash the factory images.

Yeah, a little easter egg. I did Tetris in MultiROM for LG Optimus One. Pong was much easier to make :)
[Nexus 7 Original Development] epic118:
After the easiest installation for a dualboot I've ever done, I'm now staring at my Nexus 7 running Ubuntu with the opportunity to dualboot back to Android.

This is fantastic. My hat goes down to you, sir.

AFAIK running perfectly on my 32GB Nexus 7.

Will report back here with any issues if they do arise. For some reason the last time I installed Ubuntu on my N7 the internal storage went down to something like 4GB and this hasn't happened again so that's a start :victory:

EDIT: OK, Ubuntu's a bit buggy, but that's not the dev's fault. Still got my full 32GB even after a lot of messing around in Ubuntu. I would HIGHLY recommend anyone doing this - even if they're new to Android hacking the scary part only takes like 10 seconds and it won't fail unless you unplug the cable or if the file's corrupted so...do it. :D
[Nexus 7 Original Development] jawonder:
Tasssadar i'm using Fat32 file system and i'm not sure about the speed it's an original "Amazon Basics" 32 GB flash drive. I'm not so clear on how much to select for image size for the 3 images it gives to select from, i know for Fat32 you can't go over 4095MB but i just leave them as is maybe it's the size that's causing it. I once tried each of the images at the 4095MB but it still didn't boot. . Maybe you could say how much to choose for each image for .
[Nexus 7 Original Development] rebel1699:
Fat32 was giving me a few issues as well. Once I formatted to ext4, everything was flawless. The speed of the usb stick could present issues too. Formatting the drive from within your internal n7 ubuntu installation is a little different than from ubuntu on pc because it is laid out a little different. The stick must be unmounted, formatted, then your good to go.

Instructions-

Insert usb drive and Open "disks". Towards the bottom, tbere is a bar with a square, a "-" and gears. Tap tbe square. That will unmount the drive. It will now be a "play" type symbol. To its right, tap the gears. Choose format. Use ext4 as the fs, and name it whatever you wish. Click format. When the confirmation pops up, tap format again. Wait for it to finish. All done! Reboot and install to your ext4 formatted disk with fewer problems and no size restriction.

Skyrocket on AOKP by R4ins
[Nexus 7 Original Development] jawonder:
Ok thanks much.
[Nexus 7 Original Development] rebel1699:
No problem at all. Just post results of the operation and install when your all done so all can benefit from your experience. Best of luck!

Skyrocket on AOKP by R4ins
[Nexus 7 Original Development] jawonder:
OK but i'm still waiting on you to post the screen shots on how to format Ext4 in Ubuntu on Nexus 7 . Tried but it was a bit confusing i couldn't fine ext4 .
[Nexus 7 Original Development] rebel1699:
Ok, here is the link to the pics and steps. they were too big to upload directly, and I didnt feel like shaving them down.

http://db.tt/DuZCChUK
[Nexus 7 Original Development] jawonder:
Ok got it formatted to Ext4 gonna try an install .
[Nexus 7 Original Development] tiuk:
When I try to boot ubuntu I get a message saying kexec-hardboot support is required. I thought the kexec-hardboot kernels in the op were only for android roms. Am I supposed to do something else to patch the ubuntu image?
[Nexus 7 Original Development] rebel1699:
Go into recovery and got to advanced-multiboot-list roms, choose ubuntu "userdata" and inject current boot. Providing you have already installed the correct kernel from the op.
[Nexus 7 Original Development] jawonder:
Ok they boot up now but freezes a lot and is extremely slow guess it's the USB speed gonna have to get a new one . What's the best one i can get i ?, searched but some of the reviews are misleading .
[Nexus 7 Original Development] rebel1699:
Tassadar posted a link quite a ways back to the one he bought. It was on ebay I think. Personally, I use an external hdd, which is super fast.
[Nexus 7 Original Development] tiuk:
After listing roms and selecting Ubuntu my only options are rename, delete, and re-patch init.
[Nexus 7 Original Development] rebel1699:
Go ahead and try repatching the init.
[Nexus 7 Original Development] bonzer2u:
Looks like the OP was updated this AM, thanks Tass.....
[Nexus 7 Original Development] jawonder:
Ok i'll check for T's post . Isn't the hdd Huge to carry around ?.
[Nexus 7 Original Development] rebel1699:
Mine isnt. Much smaller than the n7. But, I still only use it at the house mainly. I use the on board roms when out and about.

Skyrocket on AOKP by R4ins
[Nexus 7 Original Development] jawonder:
I was searching on Best Buy's site for mobile Hard Drive and i saw this :-

http://m.bestbuy.com/m/e/product/detail.jsp?skuId=5311043&pid=1218631360223 Can i use this ?.

Or which of the is best ?:-

http://m.bestbuy.com/m/e/search/results.jsp#Bestbuy/results
[Nexus 7 Original Development] rebel1699:
Should. Keep in mind, the hdd needs external power because the n7 cant supply enough to run it. Mine does not have one, so I had to wire a 5 volt power supply into tbe usb cord, lol. But I do soldering and electronics for a living.

Skyrocket on AOKP by R4ins
[Nexus 7 Original Development] jawonder:
So non of them comes with a power cord ?.
[Nexus 7 Original Development] rebel1699:
The first one does not. The second, I cant tell because it says the page was moved.

Here is a side by side comparison pic for reference.

http://db.tt/fI4DzBbr
[Nexus 7 Original Development] jawonder:
That size isn't bad, gonna check Best Buy on my way home to i'll try and find one with a power cord. Thanks much .

Edit: Isn't the mobile Hard drive in the links i posted made to run from the power of whatever it's connected to, for example the Nexus 7 ? .
[Nexus 7 Original Development] rebel1699:
They are, but the nexus 7 cant supply the power it needs. A pc will, but the n7 just doesnt have the output.

Skyrocket on AOKP by R4ins
[Nexus 7 Original Development] jawonder:
I was about to get a "Seagate Slim 500GB USB 3.0 Portable Drive" how would i get some power to this ? . It's a bit smaller than yours
[Nexus 7 Original Development] rebel1699:
I had a 5 volt wall adapter, and spliced it into the power wires of the usb cord. I do not recommend it unless your confident in wiring and soldering. Other than that, I dont know how else to supply it with power. Wish I could be of more help, but the options are very limited on hdd that does not already have an existing power supply.

Skyrocket on AOKP by R4ins
[Nexus 7 Original Development] jawonder:
I think i'll try and find a technician to do it for me
[Nexus 7 Original Development] jawonder:
Hey "rebel1699" sorry to bother you bro but can this cable work to plug into a power source and the nexus 7 ? :-

(1) http://www.amazon.com/StarTech-com-...-Drive/dp/B003HHK576/ref=cm_cr_pr_product_top

(2)http://www.amazon.com/eForCity-Micro-B-USB-Cable-Black/dp/B005M0ICG2/ref=pd_sim_sbs_cps_1

I bought the "Seagate Slim portable 500GB USB 3.0" which has the connect as in number (2)
[Nexus 7 Original Development] DZonikg:
I am still using ubuntu 12 as second rom so can someone tell me is bluetooth mouse working in ubuntu 13
[Nexus 7 Original Development] jarari2:
Hi! I need some help!

I installed Multirom v3 and Ubuntu 13.04 through TWRP.

The installation took an hour to complete(which is weird), and it stops while botting with something like <initfams>(not sure about the name) on the last line of the screen.

Could anyone tell me what to do now?
[Nexus 7 Original Development] rebel1699:
Yes, it should work. Just plug the second usb end into a 5 volt ac adapter and youll be good to go.

Skyrocket on AOKP by R4ins
[Nexus 7 Original Development] epic118:
Mods, please remove this post as I can't figure out how to do it myself :P
[Nexus 7 Original Development] rebel1699:
Did you flash the appropriate kernel supplied in the op? Looks like it is an init issue from not having the correct kernel. If so, then open recovery and go to advanced-multirom-list roms- click on "userdata" and rthen click re inject init. Reboot and try booting ubuntu again.
[Nexus 7 Original Development] jawonder:
Nice !! , i ordered it , MultiRom and my Nexus 7 are gonna be very good friends .
[Nexus 7 Original Development] jarari2:
Thanks for the reply!

I did what you tell me to do,but it didn't work:(

Please tell me if there's something wrong.

I flashed kexec-hardboot patched cm10.1 kernel and pressed "inject curr. boot sector" and "re-patch init" button. But Ubuntu shows me that some roots don't exist, and init doesn't exist. And it stops with the line "<initramfs>".

Should I delete and install Ubuntu again?
[Nexus 7 Original Development] rebel1699:
Would not hurt to delete and try again. Did you verify the md5 of your ubuntu download for correctness?

Anything beyond that, and Tassadar will probably have to help you. I can help where I can, but beyond a certain point I find myself inadequate to effectively assist. I mainly hang out here to help with the more common issues as to take some pressure off tassadar in appreciation for his multirom contribution.

Skyrocket on AOKP by R4ins
[Nexus 7 Original Development] jarari2:
Maybe I should download the file and install it again.

It took an hour to install, so probably there was something wrong with the file.

Thanks for the reply and your efforts! ;)
[Nexus 7 Original Development] rebel1699:
Metallice released a25 kernel today with kexec support for MultiROM. Now we have even more to choose from.
[Nexus 7 Original Development] Tasssadar:
Regarding the USB hard drives - I've got this one as a christmas present: http://www.amazon.com/Transcend-StoreJet-External-Drive-TS500GSJ25M3/dp/B003MVMTDA/

It has USB 3.0, it comes with USB Y-cable for extra power (amazon has pictures where it has extra port just for power - mine does not have that (why?)). But, what is amazing - Nexus 7 can handle this disk even without external power. Just plug-in, and it works. Nice :)

EDIT: You won't get full speed of the disk though, it probably can lower it's power consumption by slowing the disk down - but it is still pretty fast, probably about the same as my kinda-expensive flash drive.

EDIT2: Windows can handle external hard drives with more than one partition. Y U CAN'T DO THAT FOR USB FLASH DRIVES?!
[Nexus 7 Original Development] rebel1699:
To partition flash drive in windows, try lexar usb format tool. It will let you change the bit from removeable to fixed, and then can partition in wimdows. Would be nice to have the native ability though.

Hy hdd is 2.0, but is still getting better i/o speeds than the internal. Your 3.0 should fly! I might have to get one, so I wont need external power.
[Nexus 7 Original Development] jawonder:
The one i have is 3.0 but its still looks as if it need external power when i plug it into the PC the indicator light is steady but when i plug it in the Nexus 7 it blinks continuously and also it does not show up on the nexus 7 it shows on both PC and Mac as i formatted it for both . I'm wondering if it's formatted to the Right file system for the nexus 7 if it would work with the power source . What file system can i format it to to work on the Nexus 7 ?, i'm not seeing the option for fat32 and also it does not show up in Ubuntu on the Nexus 7 . I'm anxious to use it before i get my Y cable from Amazon which is gonna be about seven days that's the quickest time available form the company that's shopping it .
[Nexus 7 Original Development] rebel1699:
I use the ext4 format. It is native linux and it has no space restriction.

If the light blinks continuously, it is probably not getting enough power. If mine is not hooked to external power, the light still comes on, but doesnt have the juice to initialize the disks themselves.
[Nexus 7 Original Development] jawonder:
Ok kool, guess i have to wait for the Y cable which is gonna be like a year . Have a great Christmas bro you are very helpful on here and to everyone Merry Christmas .
[Nexus 7 Original Development] Pawnty:
My main questions, which I really don't know what are related to; not sure if it's an Ubuntu problem, a multirom problem, or a me problem.

1) I get frequent popups in Ubuntu 13.04 asking me to report an error, but I have no idea what the error is as it doesn't provide details. I'd love to report the error but after tapping the "Report" button, I get asked for my password which is fine. What is not fine is the fact that the password input dialog appears OVER everything, including the onboard keyboard, thus rendering it impossible to actually input anything into the password field. Any input on this?

2) the application search bar in... that top left icon which I don't remember the name of right now. I can never actually search anything with it, no matter how many times, or where I tap the search bar the onboard keyboard just won't appear, and if I tap the onboard keyboard menu to manually bring it up the search window just disappears anyways.

3) How the hell do I right click?! I know it's possible on a desktop Ubuntu setup, just can't figure it out on a touchscreen... holding and two finger tapping didn't work and that was all I could think of. ><

4) Is there anyways to enable finger swipe page scrolling in firefox rather than using the scrollbar on the right? the scrollbar can be rather annoying to get at ><
[Nexus 7 Original Development] bonzer2u:
I had issues with certain nightlys I always hit cancel when asked, try the 12/18/12 release posted awhile back, also most of the questions you asked are posted in the ubuntu N7 wiki here:

https://wiki.ubuntu.com/Nexus7

and updated 'using' tips here:

https://wiki.ubuntu.com/Nexus7/UsingTheDevice?action=recall&rev=37
[Nexus 7 Original Development] Metallice:
I hear it's a pretty good kernel
[Nexus 7 Original Development] bonzer2u:
+1, I like it.....
[Nexus 7 Original Development] rebel1699:
Lol, ya think? :D

Skyrocket on AOKP by R4ins
[Nexus 7 Original Development] rifraf1:
Did you try the new a25 version?

I installed it and it takes a very long time for the boot process to start once you select a ROM, upwards of ten minutes it just sits at the red boot message screen. It eventually starts and the ROMs seem to run fine perhaps a little slower during setup. I went back to the 4.2 and cm10.1 kernels in the op and all runs at normal speed.

Has anyone tried and experienced this with the a25 kernel version. Am I the only one with this symptom?
[Nexus 7 Original Development] Metallice:
It most likely means you're not running the most recent bootloader version.
[Nexus 7 Original Development] rifraf1:
That was it! Upgraded to 4.13 from 3.41 and it runs at normal boot up speed.

Thanks, now I have to figure out what all the options do in the Trickster app.
[Nexus 7 Original Development] k4bbe:
Merry Xmas all that are celebrating it :D

I've been playing around with this mod since I got my N7 a few weeks back.

I've been pretty used to dual booting Roms on GS2 but this seems to work slightly differently to that.

I'm currently wanting to uninstall Multirom for a while but seem to be having issues doing so.

I've tried reflashing boot image (from base rom Slim bean 310) and recovery images via fastboot but still get the Multirom screen at startup.

I also tried flashing Franco kernel as its stated in the first posts that due to the way this kernel is packaged it will erase Multirom, but this also didn't work. It just hung at the Google splash screen.

Would anybody please be able to tell me how to effectively uninstall as I don't seem to be able to find a definitive guide or explanation on the best way to get this done.

Thanks :)

Edit: Re flashed rom and then restored backup without boot and that has solved it. The backup was made with Multirom installed so kept restoring it. My bad.
[Nexus 7 Original Development] rebel1699:
I never even thought about a backup being made while multirom was installed doing that. That could be some handy info for people who get stuck in the same situation.
[Nexus 7 Original Development] jawonder:
Well i totally destroyed my Nexus 7 16GB yesterday glass and body was smashed. Today i had to call about ten Walmarts and i found one 18 miles from where i live that have only one left a 32 GB wifi, after calling about 3 times i finally convinced some to put it aside for me , they say it's against their policy to do that . So i picked it up after work unlock and root and now i'm ready for so fresh MultiRom .
[Nexus 7 Original Development] rebel1699:
Sorry to hear about the casualty man! But you are gonna love the extra 16gb of space. I know I do. Glad you replaced it so fast.
[Nexus 7 Original Development] jawonder:
Thanks man, yeah the extra 16GB really makes a difference it's like a win loose situation, but i'm glad i got one back .
[Nexus 7 Original Development] krion64:
How long should it be taking to boot the internal ROM?
[Nexus 7 Original Development] rebel1699:
The first time, it can take quite a while. Eventually, it will come to a setup screen, much like when installing on a pc. That takes another 5 or 10 minutes.