yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Original Development] bombadier:
I am sorry but I just cannot seem to find how to run kitkat primary and MM secondary, the secondary rom will not boot, think its a kernel thing, do I just flash a patched kernel to the secondary ROM ? Somebody please put me out of misery as nothing I search for returns anything of sense

"Multirom kk primary and MM secondary"

I do not get errors in recovery but the secondary rom just will not boot, I did not have this problem when I had a MM rom in primary,

Thanks for any help
[Nexus 7 Original Development] jbaumert:
You need to have a "patched kernel" flashed to the PRIMARY ROM. This allows it to boot the secondary kernel. You can find patched kernels in the 2nd post: http://xdaforums.com/showpost.php?p=34577851&postcount=2
[Nexus 7 Original Development] Jaloviina:
Stated in OP under 2. Secondary ROM.... I would try a patched kernel for your secondary too!!!
[Nexus 7 Original Development] bombadier:
Thanks but the primary kernel I am using already has the patches, how do I get the secondary rom to use its own kernel? I am using SlimKat (KK) and bricked kernel,multirom manager reports Kernel: has kexec-hardboot patch I would like to keep slimkat as primary

---------- Post added at 02:48 PM ---------- Previous post was at 02:46 PM ----------

Yeah I got it now I think GtrCraft made a compatible aosp kernel which I downloaded, cant find reference to his post though as I see there is no patched kernel for mm in the op.

Also in the op it does say you only need the patched kernel for primary rom

"You need to have kernel with kexec-hardboot patch only in your primary ROM!"

Will try flashing the patched MM kernel to the secondary rom and see whats what, thanks for your responses.
[Nexus 7 Original Development] Jaloviina:
I quoted Tassadar from OP in my first post, please read carefully, it's there under updating/changing ROMs.

This Kernel is patched I'm using it... Even with slimkat as primary and DU MM as secondary...

http://xdaforums.com/showthread.php?t=3310642
[Nexus 7 Original Development] bombadier:
Sorry I did miss that bit, how to flash a kernel image to secondary slot ? Only see a way to flash zips ?

Going to try adding the patched boot image to the rom zip and reflash it
[Nexus 7 Original Development] Jaloviina:
Or you use the DC-Kernel i've linked for you... It's a good one! And it's patched... And a .zip! ;)
[Nexus 7 Original Development] bombadier:
Thanks again, not sure why I am making such a meal of all this multirom milarky :laugh: thanks for all the help
[Nexus 7 Original Development] bombadier:
This is proper bursting me, SlimKat with bricked kernel, primary slot, boots,

http://xdaforums.com/nexus-7/development/unofficial-pure-nexus-project-layers-t3243943 as recommended in your kernel thread flashed to secondary with DC kernel flashed to secondary rom does not boot, have downloaded the rom files over USB(a bit flaky) and wireless same result, no error just a no boot, any other suggestions ?
[Nexus 7 Original Development] Jaloviina:
Weird! So what happened exactly? Literally nothing? Black screen, Google screen, anything? What gapps and which size? Maybe the Gapps package is too large?

Watch the Flashing on MultiROM, did the boot sector get injected?
[Nexus 7 Original Development] bombadier:
I finish flashing no error messages and I see inject boot sector thing no indication that anything has gone wrong, reboot select my secondary rom from the boot menu, I get the google screen and then it boots into recovery, reboot and it boots the primary rom,

As for GAPPS I prefer as small as possible so use open pico,not flashing gapps results in a no boot either,

My method once more

Primary SlimKAT with bricked kernel everything fine and the kernel has the needed patches

Multirom recovery

Add secondary rom flash from zip wait till done

Flash patched mm kernel as suggested

flash gapps supersu etc

reboot and double tap secondary rom from boot menu (entered by holding vol + ) and dont profit, since there are no errors I doubt a recovery log would help ?

Where am I going wrong ?

[MENTION=5642505]Jaloviina[/MENTION] its not that, I have selected the rom to boot although it was not clear from method, have updated
[Nexus 7 Original Development] Jaloviina:
Sometimes it's strange... Try this for secondary and probably it's bull**** but who knows:

Flash ROM, Gapps, patched kernel, SuperSU.

I've experienced myself that the flashing order is very important sometimes! If this doesn't work, change the order of kernel and SuperSU... Be creative.

There's nothing more to say beside that with the DC-Kernel the DU-Rom works as secondary... I'm not a pro

---------- Post added at 06:12 PM ---------- Previous post was at 05:53 PM ----------

Damn, did you double tapped when you try to boot the secondary? This is it! That's the reason!

I've read again your post, you didn't double tapped

---------- Post added at 06:30 PM ---------- Previous post was at 06:12 PM ----------

You can start the secondary (same as primary) via MultiROM Manager App as well! Try this, there's only one possibility for settings in the app. From there you can start the ROMs too. What happens? The same?
[Nexus 7 Original Development] iamkazi:
I need kernel for cm13 asus zenfone 2 ze551ml please
[Nexus 7 Original Development] PinoDG:
New TWRP 3.0.2.0 bugfix relesead...wait for an update of twrp multirom...thanks Tassadar for this multirom mythical work

my all nexus
[Nexus 7 Original Development] Azeriak:
Help

hi, i downloaded plasma 4 in my nexus 7 2012, i open the recovery of multirom> select the option multirom> Add ROM> MultiROM Installer (*.mrom files)>select plasma_grouper_20140121.mrom>next>swipe to confirm

But always happen this : Failed to extract file rom/root.tar.gz from the zip

Failed to extracr base root

Erasing incomplete ROM

I tryed with ubuntu Desktop but have the same . Thank you for help me
[Nexus 7 Original Development] bilbonotry:
I think this file is not compatible anymore. You have to go to KDE active wiki to get up to date files if I remember well
[Nexus 7 Original Development] Startrek852:
Plasma Active has been superceded by Plasma Mobile. Here's a link on how to install it with MultiROM (except ignore the part about installing patched recovery, it's no longer needed if you already have MultiROM TWRP): https://community.kde.org/Plasma/Mobile/MultiROM
[Nexus 7 Original Development] Zladimir:
Hi there,

is it possible to boot into Win10 with MultiROM ?
[Nexus 7 Original Development] Oajj:
No. Windows is not unfortunately open source. And I dont think old nexus 7 even runs it due outdated hardware.
[Nexus 7 Original Development] k20-:
My device is, I guess, soft bricked. This happens after I installed the .img file (from OP 2nd page) from fastboot. If I try to boot into recovery, it will stuck at the Multirom flash screen and won't go further. The device will boot normal with AOSP (currently installed). However, there are no Google Play Services available. I can't install Multirom from the Play Store. I did flash gapps that comes with the ROM. But for some reason, they won't show up in the ROM. I don't even know if SuperSU is there or not. Now if I try to flash a different recovery (stock or whatever), it just fails. It won't allow me to erase it either.

D:\android-sdk\platform-tools>fastboot erase recovery

erasing 'recovery'...

FAILED (command write failed (Invalid argument))

finished. total time: 0.002s

How can I get out of this situation now? Can someone with similar experience share some suggestions?
[Nexus 7 Original Development] bilbonotry:
Maybe your bootloader is locked again. You can try fastboot oem unlock (beware this will WIPE your data !).
[Nexus 7 Original Development] k20-:
It's never been locked.
[Nexus 7 Original Development] jhbsa:
I need help but I am not sure if this is the correct place

I have a Nexus 7 (2013) on which I have installed Multirom v33 to be able to dual boot Android and Ubuntu touch.

I have tried several Ubuntu touch channels offered by Multirom, but none wants to boot.

They all reboot the tablet after a few seconds, putting me back at the Multirom boot selection page.

I suspect the problem lies with Ubuntu rather than with Multirom.

Thanks in advance
[Nexus 7 Original Development] Startrek852:
Wrong thread. This is for the 2012 Nexus 7, not the 2013.
[Nexus 7 Original Development] :
When i install Cyanogenmod13 or 12.1 i get an error : I can't access at the galley, A message appear : No External Memory avabile. and then he close...

Sorry for bad engl.
[Nexus 7 Original Development] OsitKP:
I have installed Timasek CM12 and Multirom. MM tells there is no kexec patch. Tap Install, restart the device.. no kexec patch again. What's the reason?

P.S. I've found out that TWRP script doesn't work. Installed patch kerne manually and multirom started to load Omni 6.0.1. :)
[Nexus 7 Original Development] vital21:
Hi, guys!

Everything works perfectly! But there is one thing that i cant understand...i really hope for some explanation or advice.

Lets say i have 2 ROMs: Internal and Secondary_ROM.

When i'm loading with Secondary_ROM, i find that Internal Storage includes all files from Internal_ROM...

Is it possible, somehow, to hide the Internal Storage of Internal_ROM? So the Secondary_ROM will appear brand new and fresh installed with usual after-install folders ( Pictures, Downloads, etc ) ?

This is all about security for me...if the Secondary_ROM will have an access to Primary_ROM folders, it will leak any information inside!

Sorry for my bad english< any advice will be appreciated!

Cheers!
[Nexus 7 Original Development] Startrek852:
Sorry, but Internal Storage is shared with all other ROMs. I don't think there's anyway to prevent that.
[Nexus 7 Original Development] arman-teta:
When I format data and catch Whit f2fs and instal multi rom my first rom and second rom don't. bot can yo help me?
[Nexus 7 Original Development] clixer:
We need more detail than that. What ROMs are you using and what error messages are you getting? Likely it is the rom_info.txt, but we need more info.
[Nexus 7 Original Development] EpicLPer:
Heya, I know this might not be the right thread here but is there any way to (at least try to) request this for a new phone? Would be nice to see this on the OnePlus 3 since it has almost 64GB of storage.
[Nexus 7 Original Development] clixer:
https://github.com/Tasssadar/multirom/wiki/Porting-MultiROM
[Nexus 7 Original Development] vital21:
Hi,

after few weeks of deep testing this GODmod software...( and reading FAQ sections as well ), I still have some misunderstanding and hope you could make it clear for me, guys!

The one word - Dependencies.

What I understand is:

1) Main ROM must have kex-kernel and MultiROM installed

2) Recovery must be not less 2.8.0. with MultiROM support

I'm not sure if i get right the following:

1) If the main ROM has "kernel kex", should the secondlies also have it?

2) if the main ROM has MultiROm.zip installed, should the secondlies also have it?

3) Is there any dependence on build.prop file on MainROM or SecondRom?

4) Is there any sense to test booting from USBOTG? Maybe some security tweaks? As it seems all USBOTG will be much slower than booting from internal storage? Correct me if I'm wrong please...

P>S> and a bit offtopic question...I thought tilapia device is fully supported, but I still cant find any flashable factory image ( multirom ) for it. Also the kernel-kexec posted at 1st page has the name kernel_kexec_grouper, and Im a bit confused...could I use it for tilapia without hardware/firmware problems afterwards?

I will appreciate any advice and every piece of information!

Cheers! ;)
[Nexus 7 Original Development] junooni:
Hi. I installed the Multirom 2 days ago and its working fine. I have just received an OTA security patch update on my stock rom, however I can't install it as when I select update, the tablet restarts and goes into the multiboot menu.

Can you please help and explain how to apply the OTA updates?
[Nexus 7 Original Development] Startrek852:
Umm, there aren't any OTA updates for this tablet, you must be talking about the 2013 Nexus 7 not the 2012. You can use the instructions from here: http://www.howtogeek.com/192402/why-androids-ota-updates-remove-root-and-how-to-keep-it/
[Nexus 7 Original Development] badhon_raj:
Can anyone help me install ubuntu desktop?

I don't see an "Ubuntu" option in Advanced -> MultiROM -> Add ROM

I'm using MuitiROM v32

also the download link isn't working anymore.

where do I download the latest files from?

Edit: This page shows the latest version was sausy.
[Nexus 7 Original Development] X-form:
No Ubuntu desktop in Nexus 7 2013 flo/deb

As far as I know, there is no Ubuntu desktop ROMs for the Nexus 7 2013 (Flo/Deb), hence no "Ubuntu" option in Advanced -> Multirom -> Add ROM. The Nexus 7 2012 (Grouper/Talipia) has Ubuntu Desktop for it and it even has that optioin in Advanced -> MultiROM -> Add ROM in TWRP recovery. I installed Ubuntu Desktop 13.04 Raring Ringtail and it worked, but apt-get didn't work as Raring Ringtail has reached the end of life. The repositories are old, and I haven't been able to update them so I don't use Desktop Linux Ubuntu on my Nexus 7 2012 anymore. Ubuntu desktop has been discontinued in favor for Ubuntu Touch (which isn't as good or the same imho). The Nexus 7 2013 wasn't made during the time when Ubuntu Desktop was being actively developed. BTW, I have the Nexus 7 2012 and 2013, so I know how the menus are different on each one in TWRP Multirom. Hope this helped. I can give you the files for Ubuntu Desktop for Nexus 7 2012 (grouper/talipia) if you want it.

---------- Post added at 06:49 PM ---------- Previous post was at 06:28 PM ----------

I flashed a Lollipop ROM as a secondary ROM on my Nexus 7 2013 and it ran well. When I tried to delete it when I was done with it, it failed to delete. It will say ROM deleted Failed in red. There aren't any noticible error messages in the TWRP logs. I just flashed other Lollipop ROMs, Kitkat ROMs and a Marshmallow ROM and deleted them, and they deleted sucessfully. I don't know what is up with this. Also, I am not able to manually delete the ROM folder through a es file explorer with root access. It just says failed. My Storage isn't going bad as I can still do anything on the tablet and copying and deleting files are unaffected too. Does anyone have an issue where you can't delete a ROM? If so, please tell me how to fix the problem if you know.
[Nexus 7 Original Development] badhon_raj:
Thanks for the reply.

I found the files here:

http://old-releases.ubuntu.com/releases/

I really hoped there is a way to install it in my nexus7 lte.

But I guess there isn't any way. :(
[Nexus 7 Original Development] X-form:
The reason this won't work is because there driver issues and each tablet and even computer requires different drivers. Desktop Linux on Nexus 7 requires special drivers that only work for a specific version of a tablet. It also needs to not be too resource intensive. I wish I could install Ubuntu Desktop on mine too, but there isn't a way to do that. If you have a computer you may be able to use Ubuntu on your computer.
[Nexus 7 Original Development] badhon_raj:
I use debian in my desktop. I like it more than ubuntu.

If you update the sources.list with the domain http://old-releases.ubuntu.com/ then apt-get will work.
[Nexus 7 Original Development] Platinum1986:
Hello everybody,

I just did a great mistakes, i tried to copy the secondary rom to primary rom with multirom TWRP V 3.0.0.0 , so it started to format the primary slot and it failed... and now i can't even boot my secondary rom because i don't have slot partition with kexec-hardboot patch anymore...

What's the best option to retrieve my secondary rom, please ?

Thank you.
[Nexus 7 Original Development] pr@tt:
Hi All,

I'm curious about one thing that may happen accidentally. I have secondary ROM installed on external Pendrive (via USB-OTG). What could happen if I detach it after secondary OS boots. As said it can happen accidentally. I just want understand possible consequences. Did anybody happen to face that ?
[Nexus 7 Original Development] X-form:
I had that happen several times. I actually did that purposely when the ROM is booted. What happens is the ROM goes into a bootloop and the boot animation never stops. Just hold down power button and the Nexus will turn off and you can turn it on normally again.
[Nexus 7 Original Development] Splify:
Secondary rom won't boot after update

Hi Guys,

I have an issue with multirom, it was working fine but after upgrading the primary rom of revolution remix the secondary multirom image stopped booting

I tried making head or tails of the log and I think it has something to do with the config file under \proc

<3>[ 3.882929] multirom: Running MultiROM v33b

<6>[ 3.884360] multirom: Loading MultiROM status...

<3>[ 3.885216] multirom: Loading fstab "/mrom.fstab"...

<6>[ 3.887975] multirom: Adding ROM Internal

<6>[ 3.890315] multirom: Adding ROM nethunter-oneplus1-lollipo

<6>[ 3.894792] multirom: Dumping multirom status:

<6>[ 3.895218] multirom: is_second_boot=1

<6>[ 3.895469] multirom: is_running_in_primary_rom=0

<6>[ 3.895711] multirom: current_rom=nethunter-oneplus1-lollipo

<6>[ 3.896278] multirom: allow_nkk71_nokexec=0

<6>[ 3.896522] multirom: colors_v2=5

<6>[ 3.896768] multirom: brightness=40

<6>[ 3.897013] multirom: enable_adb=0

<6>[ 3.897264] multirom: enable_kmsg_logging=0

<6>[ 3.897681] multirom: rotation=0

<6>[ 3.897927] multirom: force_generic_fb=0

<6>[ 3.898236] multirom: anim_duration_coef=1.000000

<6>[ 3.898656] multirom: hide_internal=0

<6>[ 3.898903] multirom: int_display_name=Internal

<6>[ 3.899147] multirom: auto_boot_seconds=5

<6>[ 3.899565] multirom: auto_boot_rom=Internal

<6>[ 3.899809] multirom: auto_boot_type=0

<6>[ 3.900052] multirom: curr_rom_part=NULL

<6>[ 3.900456] multirom:

<6>[ 3.900694] multirom: ROM: Internal

<6>[ 3.900940] multirom: base_path: /realdata/media/0/multirom/roms/Internal

<6>[ 3.901367] multirom: icon_path: /realdata/media/0/multirom/icons/romic_android.png

<6>[ 3.901793] multirom: type: 0

<6>[ 3.902038] multirom: has_bootimg: 0

<6>[ 3.902282] multirom: ROM: nethunter-oneplus1-lollipo

<6>[ 3.902706] multirom: base_path: /realdata/media/0/multirom/roms/nethunter-oneplus1-lollipo

<6>[ 3.903128] multirom: icon_path: /realdata/media/0/multirom/icons/romic_default.png

<6>[ 3.903375] multirom: type: 1

<6>[ 3.903794] multirom: has_bootimg: 1

<6>[ 3.904062] multirom: nkk71: primary_boot.img location will be=/realdata/media/0/multirom/primary_boot.img

<6>[ 3.904492] multirom: nkk71: locating boot partition...

<6>[ 3.904741] multirom: nkk71: found boot at '/dev/block/mmcblk0p7'

<3>[ 3.905232] multirom: /proc/config.gz is not available!

<3>[ 3.924227] multirom: Skipping ROM selection, is_second_boot=1, auto_boot_type=0x0

<3>[ 3.924860] multirom: No run-on-boot scripts for ROM nethunter-oneplus1-lollipo

<6>[ 4.041793] multirom: Using fstab ./fstab.bacon from rc files

<3>[ 4.041973] multirom: Modifying fstab: ./fstab.bacon

<3>[ 4.044007] multirom: Could not open /system/build.prop to read api level!

<6>[ 4.045198] multirom: Left Split=0

<6>[ 4.045480] multirom: Right Split=0

<6>[ 4.071367] multirom: Framebuffer implementation: Qualcomm ION overlay

<3>[ 4.091029] mdss_fb_ioctl: unsupported ioctl (40b86da4)

I've tried wiping and reinstalling secondary rom but no cigar.

Also tried flashing to secondary rom updated firmware and no cigar.

If anyone can shed some light, I will be extremely happy.
[Nexus 7 Original Development] PinoDG:
Hi

you're referring to OnePlus 1? This is the thread for Nexus 7 2012 ... it seems that the primary kernel had not xexec patch MultiROM therefore need to install a kernel that is already patched and after the rom ... maybe franco kernel is the case if there is to your model ... without kernel patched in primary rom all our other do not work

my all nexus
[Nexus 7 Original Development] Merchantman:
Thanks for the response.

I have a bacon kernel update c7 from January. Maybe that could help, I tried flashing the secondary ROM with it out of fear in doing it on primary.

Will try that next,thanks again!
[Nexus 7 Original Development] _never_mind_:
http://xdaforums.com/nexus-7/development/android-6-aosp-grouper-t3268172

Downloaded the Android6 zip, gapps zip and SuperSU zip and added it to multirom via twrp.

Now running Android 6 on my Nexus 7 2012 as a ROM via Multirom :)) Seems a bit slow, but fun that it works. <edit>speed actually quite ok :)</edit>

Thanks a bunch for making this available! :)
[Nexus 7 Original Development] jerethi:
I have a question about the kexec-hardboot patch.

I am running Cyanogenmod 13 on my Nexus 7 2013. Will installing multirom, and, more specifically, the kexec-hardboot patch modify my kernel in anyway? Does this modify my OS installation? Finally, can I use multirom with Cyanogenmod as my primary ROM?

Thanks!
[Nexus 7 Original Development] Startrek852:
First of all, wrong thread. This is the for the 2012 Nexus 7, not the 2013. Yes, it will modify your kernel unless you are already running a custom kernel that has the kexec-hardboot patch in it. I don't think it modifies your OS. And yes, you can have CyanogenMod as your primary ROM. You can have any ROM as primary as long as it has the kexec-hardboot patch.
[Nexus 7 Original Development] jerethi:
Thank you. And sorry for posting in the wrong forum!
[Nexus 7 Original Development] Startrek852:
It's okay, it's pretty easy to confuse them. And if you want my opinion, I would use Glitch kernel. It's my favorite kernel. :)
[Nexus 7 Original Development] sciamanozx:
thanks :D
[Nexus 7 Original Development] Atari-San:
Is the support of Multiroms dead or do they plan a patch for nougat later when it get more mainstream ? I am currently running dirty unicorn 7.0 since I just got my screen and would like to have older build for compatibility issue.

Edit, now i fell stupid, i was sure when i wrote this that the primary one also needed something, which is not the case. >_>
[Nexus 7 Original Development] PinoDG:
Hi all

Maybe ... arrived a good update!

Mrom recovery current does not install Android 7 with the other 6.0.1 and 5.1.1 .. I saw in 2013 n7 thread that some dev are trying to do fork an update to their model, maybe someone could help even Tassadar for our .

Would be a shame that this mythical work was abandoned...

my all nexus
[Nexus 7 Original Development] gamer06:
Hello.

I'm trying to install arch linux on my Nexus 7. But it gives me "Kernel too old". I have the version 5.1.1 and kernel 3.1.10.

Any help

Thanks
[Nexus 7 Original Development] thomasswan5547:
Edit : i have been corrected
[Nexus 7 Original Development] Startrek852:
First of all, this thread is for the 2012 Nexus 7, not the 2013. Also, there is no kernel that's higher that 3.1 for this tablet except for a beta 3.4 kernel that only works on one specially modified AOSP 7.1 ROM.
[Nexus 7 Original Development] cocco1960:
Data

Do you need to wipe anyway to do MultiROM?
[Nexus 7 Original Development] player594:
Still waiting for the newest TWRP recovery with multirom built in.
[Nexus 7 Original Development] ironmaskusa:
Do you think there will be a new TWRP Recovery for us?
[Nexus 7 Original Development] F0x123:
Is it possible to protect MultiROM with a PIN or password so that booting is only possible after entering the correct secret?
[Nexus 7 Original Development] kpbotbot:
Sorry for bumping an old thread, but how did you manage to fix this? I already checked the .txt files inside my ArchLinux .mrom files and they all say ext4. I still can't boot though as I am stuck on initramfs. What do I do?

Thanks (:
[Nexus 7 Original Development] happy2472:
deleted
[Nexus 7 Original Development] SGH-i200:
Why doesn't MultiROM have password protection?

"Why doesn't TWRP [MultiROM] have password protection?"
[Nexus 7 Original Development] sub77:
because it is not a bootloaders business? but its opensource so feel free to extend it the way you need it.
[Nexus 7 Original Development] SGH-i200:
Link to FAQ

You didn't see the quotation marks and the link behind the quote, right? :p I was not asking for that feature, but wanted to point to the answer:

https://twrp.me/faq/securetwrp.html