linux-ext4 - [Bug 118401] Lenovo A740 gave up waiting for root device with kernels >= 4.3

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Message-ID: <bug-118401-13602-WHKkuMLJHF@https.bugzilla.kernel.org/>
Date:	Wed, 01 Jun 2016 15:26:21 +0000
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 118401] Lenovo A740 gave up waiting for root device with
 kernels >= 4.3

https://bugzilla.kernel.org/show_bug.cgi?id=118401

--- Comment #10 from Kevin Brubeck Unhammer <unhammer+dill@...st> ---
Sorry for the late reply – I still haven't been able to get keyboard working in
initramfs, so not much more useful information :(

I did try running blkid from an initramfs script:

$ cat /etc/initramfs-tools/scripts/init-premount/kbu-blkid
#!/bin/sh
PREREQ=""
prereqs()
{
     echo "$PREREQ"
}
case $1 in
prereqs)
     prereqs
     exit 0
     ;;
esac
echo "KBU"
blkid
echo "/KBU"
$ sudo  update-initramfs -u
update-initramfs: Generating /boot/initrd.img-4.6.0-040600rc6-generic

but that just shows

   running /scripts/init-premount ... KBU
   /KBU

as if the "blkid" command had no output. Is there something more useful I could
put in there? 

Would it be useful at all to compile a kernel with debug symbols as in
https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel#Debug_Symbols or if I change
some other configuration options? (I don't really know what I should change
though, since CONFIG_EXT4_USE_FOR_EXT2 is already tested as per the config
diff).

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