Re: [gentoo-user] grub2 or kernel config - unable to properly boot

[Michael Hampicke]

Am 26.08.2013 17:41, schrieb Francisco Ares:
> Hi,
>
> After a few solved problems, I am still unable to completely boot using
> grub:2, and now I just can't find anything else to fiddle with.
>
> So I would really appreciate if someone could take a look at my
> configuration:
>
> - system is amd64;
> - hard disk partitioning:
>   - two first primary partitions, unused (for now);
>   - third (/dev/sda3) is /boot partition, kernel built and in place;
>   - extended partition as fourth partition;
>   - logical partition (/dev/sda5) is "/" linux partition, ext4 formated;
> - emerged  the following, before building kernel;
>   - genkernel ;
>   - media-gfx/splashutils-1.5.4.4-r1;
>   - media-gfx/splash-themes-gentoo-20101212-r1 ;
>   - sys-apps/v86d-0.1.10;
> - genkernel command line:
>     genkernel all \
>         --color --menuconfig --splash=natural_gentoo \
>         --splash-res=1024x768,1280x1024,1366x768,1440x900 \
>         --mountboot --install  --unionfs --real-root=/dev/sda5 \
>         --ramdisk-modules --postclear
> - kernel built with:
>   - CONFIG_FB_UVESA=y
>   - CONFIG_INITRAMFS_SOURCE="/usr/share/v86d/initramfs"
>   - CONFIG_EXT4_FS=y
>   - CONFIG_EXT4_FS_POSIX_ACL=y
>   - CONFIG_EXT4_FS_SECURITY=y
> - grub2 defaults (/etc/defaults/grub2) only difference from original:
>   GRUB_CMDLINE_LINUX="init=/linuxrc real_root=/dev/sda5
> video=uvesafb,mtrr:3,ywrap splash=silent,fadein,theme:natural_gentoo
> nodevfs udev devfs=nomount CONSOLE=/dev/tty1 quiet"
>
> - sample extract from grub:0 config file, used in a working (a bit older)
> system:
>     title=Gentoo Linux (3.8.13-gentoo)
>     root (hd0,1)
>     kernel /boot/kernel-genkernel-x86_64-3.8.13-gentoo ro root=/dev/ram0 \
>         init=/linuxrc real_root=/dev/sda4 vga=791
> splash=silent,theme:natural_gentoo \
>         console=tty1 verbose nodevfs udev devfs=nomount CONSOLE=/dev/tty1
> quiet
>     initrd /boot/initramfs-genkernel-x86_64-3.8.13-gentoo
>
>
> Now the boot stops showing the messages (after the Tux logos appeared):
>
> Can't open cfg file //etc/splash/natural_gentoo/640x480.cfg
> No verbose picture specified in the theme
> No silent picture specified in the theme
> No verbose picture specified in the theme
> Can't open cfg file //etc/splash/natural_gentoo/640x480.cfg
> No verbose picture specified in the theme
> No silent picture specified in the theme
> !! Block device /dev/sda5 is not a valid root device
>
>
> The last line explains the ones preceding it.
>
> Any hints on where to look at?
>
> Thanks
> Francisco
>

Have you tried generating a grub2 config file via grub2-mkconfig. You
should try that and see if you can boot. Then adjust the configuration
to your needs.

On first glance, everything in your setup looks the way it's supposed to
be, but I suspect your customized grub2 cfg.