On Monday 04 October 2004 17:31, Mark Maas wrote: > Hi All, > > I've been trying to compile a kernel for a while now, followed some > different routes, reinstalled the machine a couple of times to try > booting in different FileSystems. > > I followed how-to's like this one: > <http://www.desktop-linux.net/debkernel.htm> and others, But time > and time again, i run into "Kernel Panic: unable to mount root fs." > > Well, my file system is ext3, and I compiled it into the kernel, not > as a module or nothing. Actually it is the ONLY change I made in the > whole kernel compile. > > I left everything else the way it was, and used the stock config > file for kernels. > > I'm missing something, but searching with google, only tells me to > compile the used file system in or to build a initrd image. > <http://www.google.com/search?q=debian+compile+kernel++unable+to+mount+root >+fs.&sourceid=firefox&start=0&start=0&ie=utf-8&oe=utf-8> > > Can anyone tell me what i'm missing, or perhaps show me howto's? > > Thanks, > Mark The link you found is close to my approach: ( http://www.desktop-linux.net/debkernel.htm ). A working .config for a new kernel series is gold, especially if it closely resembles your hardware. Initially I had the same kernel panic error that you had, and it turned out to be because the 2.6 .config had defaulted to ide/ATA-2 drivers being installed as modules. To rephrase, download the .config from the site above, into /usr/src/kernel-source-2.6.xx/ then run 'make oldconfig', to customise. As I mentioned, check the ide/ATA-2 drivers with 'make menuconfig': - Device Drivers ---> ATA/ATAPI/MFM/RLL support ---> [*] ATA/ATAPI/MFM/RLL support <*> Enhanced IDE/MFM/RLL disk/cdrom/tape/floppy support <*> Include IDE/ATA-2 DISK support Other suggestions: - Delete the kernel-source directory and untar the fresh source again. - Use a friend's working .config - Copy /usr/src/kernel-source-2.6.8/arch/i386/defconfig to /usr/src/kernel-source-2.6.x/.config then customise with 'make menuconfig'. - My make-kpkg recipe: # wget http://kernel.source.org/linux/2.6.0/linux-2.6.x.tar.bz2 # tar xvjf linux-2.6.x.tar.bz2 # cd linux-2.6.x # make oldconfig (defaults seemed ok) # make menuconfig : - You really have to enforce the ide-2 + ext2/3/reiser stuff. - checked ATAPI stuff was selected. - check devfs stuff: File Systems ---> Psedo File Systems ---> [*] devfs support (OBSOLETE) [ ] Automatically mount at boot (**unchecked**) # ('make-kpkg clean' : if it was previously compiled) # 'make-kpkg' (make dinner) # 'vim Makefile' : + extraversion = -mybox.date.1 + gcc-3.4 + CC = O3 -march=pentium4m AND/OR # vim debian/changelog (edit version to mybox.date.1) # # make-kpkg kernel_image (make cup of tea) # dpkg -i kernel-image-2.6.x_mybox.date.1_i386.deb # vim /boot/grub/menu.lst : (then edit) #Kernel options kopt=root=0305 ro hdc=ide-cd vga=791 groot=(hd0,1) title Debian GNU/Linux, kernel 2.6.x-mybox.date.1 root (hd0,1) kernel /vmlinuz-2.6.x-mybox.date.1 root=/dev/hda5 ro savedefault boot # update-grub # shutdown -r now HTH. YMMV depending on hardware. The article above is correct when it mentions the nvidia modules, but I don't think this is your problem (yet). And don't neglect /etc/fstab! # filesystem mountpoint type options dump pass devpts /dev/pts devpts gid=5,mode=620 0 0 tmpfs /dev/shm tmpfs defaults,nosuid,nodev,size=500M,noatime 0 0 proc /proc proc defaults 0 0 # From http://wiki.archlinux.org/index.php/UdevHowTo: usbfs /proc/bus/usb usbfs defaults 0 0 # Old devfs: sysfs /sys sysfs defaults 0 0
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