Boot Problem SD/MMC (it's the only hdd on this netbook)

pepro · n00b Joined: 02 Jun 2018 Posts: 5

Hi guys, my netbook is:

acer cloudbook 11, celeron n3050 , hdd (sd/eMMC) 32g, 2g ram.

When I installed first time gentoo (and then funtoo and then sabayon) and was asking for help, everyone told me to look fstab and other option, that in first place could be a possible solution.

But like I said, From the beginning of this odissey fstab and everything was ok but Nothing booting. Just redcore boot.

The real problem is that I'm ignorant, I just use genkernell automatic setting.

Today I tried funtoo (because of precompiled kernell) to try intalling it on USB with a pen drive, with nothing different from the other installations. It boot.

Yes very well. I'm happy? nop.

My question is:
Someone know what setting I have to use on genkernell menu to let it boot in first place from the hdd of this little inutil netbook? It has just one mmc with two little partition needed from bios to know that it can boot from there.

To be clear the Grub boot, but then kernel say that can't find root on
/dev/mmcblk0p3

But root is there.

:'''( please magik linux wizard, don't let me try with all option set, because this intel n3050 want a couple of days to compile that!!

Good by and thank u

eccerr0r · Posted: Tue Jun 12, 2018 4:06 pm Post subject:

It's not the fstab for sure. You probably don't have the emmc driver enabled in your kernel. Unfortunately there's a bunch of esoteric options that need to be set which I can't roll off the top of my head at the moment as I have dealt with so few of these machines as of yet.

You should start with the funtoo or whichever other working kernel .config and use that as your base. I don't know if genkernel "supports" emmc boot as it's not the typical SATA connection and thus likely won't work.
_________________
Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
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NeddySeagoon · Posted: Tue Jun 12, 2018 7:29 pm Post subject:

pepro,

The boot sequence goes like this ...
A bootloader loads your kernel and optionally, your initrd into RAM. If your kernel is an efi stub kernel, the initrd in included in the kernel.

The bootloader exits by jumping to the kernel start address. Then its just the kernel and initrd.
Between them, they need to mount the root filesystem as everything else is there.

Please pastebin the output of

eccerr0r · Posted: Tue Jun 12, 2018 11:52 pm Post subject:

Actually something that may make things easier is the dmesg on the working linux.

The hinting data should be there (as well as the broken linux kernel too, though not as complete.)

The emmc device does not show up in the PCI tables IIRC - but does show up in ACPI.
_________________
Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching?

pepro · n00b Joined: 02 Jun 2018 Posts: 5

Thank you very much guys! If I try another install in that machine I will try something !!

Now I have bought a 3.0 USB, if nothing go wrong I will use gentoo from there as long as the usb does not burn XD I,m at the grub installation, hoping it will boot.

If don't I will try other kernel config without begin from start.

NeddySeagoon · Posted: Thu Jun 14, 2018 4:22 pm Post subject:

pepro,

Reinstalling won't change anything. Using USB avoids the issue, sort of. You won't be able to see your eMMC card.
The challenge is configuring the kernel correctly.

eMMC is particularly challenging as there are so many different interfaces and different busses that the card can be attached to.
Its like the early days of IDE drives in PCs only worse.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

pepro · n00b Joined: 02 Jun 2018 Posts: 5

Hi neddy, yes I know that. in fact gentoo live dvd do not see my eMMC when I use that and I have to install gentoo with minimal usb installer to see eMMC.

I have installed on usb just to see if it boot like funtoo.

this is the output you was asking for:

pepro · n00b Joined: 02 Jun 2018 Posts: 5

OMG grub tell me that can't install!!! -.- I have done some bad thing with partition ate the beginning.

But I have add gentoo on the Ubuntu grub, and is up. I'm in. Gentoo log in

so happy.

NeddySeagoon · Posted: Thu Jun 14, 2018 5:27 pm Post subject:

pepro,

There is nothing in lspci to show where an MMC card might be hiding.
Its unlikely to be USB ... but its work a look before we start guessing.
What does lsusb tell?

Also put your kernel .config file onto a pastebin please.

Boot into Ubuntu and run lsmod. Post the output. Maybe we can work out what Ubuntu uses for the eMMC card.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

eccerr0r · Posted: Thu Jun 14, 2018 5:45 pm Post subject:

Another warning, the emmc is hooked up via SPI.
It will not show up under USB or PCI.
Again it does show up in ACPI tables, and the easiest way to get it to work is reverse engineering a working kernel.

I can't find my Baytrail kernel .config that has the same setup - emmc hooked up via SPI. I gave up on this machine because there were so many hardware issues that it was frustrating beyond belief (timer fscked up, wifi flaky, touch screen and graphics just don't want to work right, battery management nonexistent in Linux, ... but not saying that your hardware will have the same problems, it's just my excuse why I stopped working on mine!)
_________________
Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching?