Created attachment 243681 [details] kernel 4.8.6 config regarding ext4 error This might just be a limited issue to my set-up, but I doubt it. The issue is that I was attempting to upgrade from 4.7.4 up to 4.8.6. Nothing was changed. When I did try to boot the new kernel I got a file system error message related to ext4. This also created a corruption in my /dev/sda3 file system (ext3) and I had to manually correct it (that might have been due to unclean unmount since I had to cold reboot the computer). I did test to switch the setting from compiled in into modules, but that did not solve this issue. The ext3 file systems mount properly it seems, regardless of the errors I got later on after cold reboots on the computer. I did not get into the shell following this issue. I don't think this is any type of misconfiguration at my end. Since I follow rather regular and stable setting if possible. sdb1 is a ext4 file system. While the rest is ext3. I don't have any issue with kernel 4.7.4 with the same setting. The size is 1TB. I get this in my rc.log. I'm running Gentoo linux and compiling the kernel with genkernel (for convince). ---- * Setting system clock using the hardware clock [Local Time] ... [ ok ] * Autoloaded 0 module(s) * Checking local filesystems ... /dev/sda3: clean, 1189275/13172736 files, 15645957/52690944 blocks fsck.ext4: Bad magic number in super-block while trying to open /dev/sdb1 /dev/sdb1: The superblock could not be read or does not describe a valid ext2/ext3/ext4 filesystem. If the device is valid and it really contains an ext2/ext3/ext4 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 <device> or e2fsck -b 32768 <device> /dev/sda1: clean, 880/51200 files, 179161/204800 blocks /dev/sda4: clean, 663797/47210496 files, 143195124/188826806 blocks * Operational error [ !! ] * Remounting root filesystem read/write ... [ ok ] * Remounting filesystems ... [ ok ] * Updating /etc/mtab ... * Creating mtab symbolic link [ ok ] * Activating swap devices ... [ ok ] * Mounting local filesystems ... mount: wrong fs type, bad option, bad superblock on /dev/sdb1, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so. * Some local filesystem failed to mount [ !! ] * Mounting misc binary format filesystem ... [ ok ] * Loading custom binary format handlers ... [ ok ] ---- Attached is my kernel config for 4.8.6. This was my last attempt to solve this issue.