Software :: Udev And Tmpfs Fail On Custom Kernel - Docs Misleading ?
Jul 19, 2010
On boot, udev is giving a mount error. It appears to not have control of the /dev directory. This was finally traced to bad kernel compile, but some questions remain. Bogus information has been removed.
The kernel was built with tmpfs (CONFIG file had CONFIG_TMPFS, compiled kernel probably did not, this has been fixed.)
My system runs, probably because there is a valid /dev directory tree copied from the original 2.4.31 system.
After boot, I am getting 3 udevd running, according to "ps -A".
After re-executing /etc/rc.d/rc.udev I see only one udevd at a low id number (625).
Previously I had 2.4.31, which had udev and it was mounting using ramfs.
My fstab has:
On my previous 2.4.31 these fstab lines were:
I have been running Slackware since 1996. This is Slackware 13.1, running on a Sempron/Athlon K8, VIA chipsets. I have been fighting with this install for 2 weeks now. If I have to I will disable udev and live with a /dev directory that I setup by hand.
If udev does not have a tmpfs over the top of /dev, does it use the /dev on the harddrive or does it just fail some other way ?
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May 9, 2010
I have managed to work out how to use remastersys to create a Custom.iso LiveCD.
Can anyone advise how I can transfer a folder of documents, so they are included in the custom.iso?
I tried to put a new folder/docs inside the 'examples' folder, which shows up on the Desktop of LiveCD users, but this 'examples' folder is write-protected.
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Jun 25, 2011
I've bougt a new pc (i5-2050k, Nvidia GeForce 560Ti) and wanted to install Linux beside Windows.But each Linux-distribution (exept the old ones from Mandriva) fails installing/starting als livecd/checking for installation errors/..... while initiating udev.Is there any known bugfix for this problem? Remind, there is just Windows, so don't give me any shellcode to execute
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Mar 20, 2011
I'm trying to write udev rules to make it easier to recognize the network cards in my server. After a reboot it doesn't seem to take place, what am I doing wrong? I'm running Debian Squeeze stable.
Code:
$ uname -a
Linux debian 2.6.32-5-amd64 #1 SMP Wed Jan 12 03:40:32 UTC 2011 x86_64 GNU/Linux
Code:
# ls -l /etc/udev/rules.d/
total 4
[Code]...
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Mar 16, 2011
I couldn't find the kernel docs that go with 13.1. These docs would be the result of running this in the top-level kernel source dir.
make pdfdocs
make htmldocs
etc.
Are these not packaged? Are these built ever as part of a release or test cycle? Do any other slackers ever build these? I am seeing lots of errors from make pdfdocs "how much attention is given to DocBook on slackware?".
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Jan 24, 2010
I have a problem with my custom kernel when I want to create the Nvidia kernel module.After this finished I installed the image and headers and created the Nvidia kernel module. Everything worked fine.However, if I remove the linux-source from my home directory then I can't create the kernel module.Even though I have the headers for the kernel installed.
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Oct 31, 2009
I'm running CentOS 5.3 and would like to know what the "best" or "proper" method is to build a custom kernel using the generic kernel sources from kernel.org. Most of the references I've found talk about modifying the current CentOS kernel using the RPM way. I really want to have the latest kernel due to some important security issues that haven't been addressed in the current CentOS 5.3 kernel.
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Dec 22, 2009
I just installed Gentoo.
Everything's working fine except for this error I get during bootup: udev: missing sysfs features; please update the kernel or disable the kernel's CONFIG_SYSFS_DEPRECATED option. udev may fail to work correctly
I don't know what to do with this. I built the kernel using the genkernel script. I'm using kernel 2.6.31-gentoo-r6 on an amd64 processor
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Dec 24, 2010
I switched today to slackware-current on one of my desktops to play with it and ran directly into a problem.
Since ages my lilo.conf has two entries for slackware. One for runlevel 3 and one for runlevel 4.
Code:
Since the upgrade this is no more possible because I get a kernel panic as soon as udevadm trigger is called. The stack says something about an unknown boot option. Because that i removed the append lines from my lilo.conf and i was able to boot the system. The crash happens when udev is called from within the ramdisk and afterwards. I tried both.
My question is now. Is this a bug in udev or expected? I have this setup since at least 5 years and had never problems with that. What do I have to do to be able to select the runlevel at boot time?
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Sep 2, 2010
Out of curiosity, I decided to try the kernel-desktop-base-2.6.35-rc6.15.1.x86_64.rpm downloaded with 1-click install from here
Now my desktop can't even boot and says
Code:
Want me to fall back to /dev/disk/by-id/ata-Hitachi_HD725016GLA380_GEK830RBTV12MA-part2? (Y/n)
Both options got me nowhere. how to debug this situation?
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Oct 19, 2010
When i installed Kubuntu 10.10 on my laptop i just wiped the drive and started over. and set up a crypto_LUKS file system. and everything was working great until i compiled a new kernel. now the new kernel panics at boot up when it tries to mount the file system. i can still boot from the older, generic kernel that came with Kubuntu but i'd really like to get this new one working.
What i did for the kernel was i loaded the settings from my old config file and just removed drivers and made it fit my processor. i really didn't touch file system support. my new kernel is 2.6.35.7.
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Oct 14, 2010
a stock fedora 11 install on my embedded board results in the primary CompactFlash card being driven by the SCSI driver and is called SDA..running my custom kernel which i have slimmed down and yanked out the SCSI stuff because I dont need it, results in my CompactFlash card being called HDA of course driven by the ATA driver.which should I be using? both work just fine.. the CompactFlash card is on board and according to Soekris is actually run from an IDE controller, as there is no SCSI on board..
so im assuming the less amount of system overhead is to run it as IDE?I have no issues running it either way I just want to do whats right.. and what is going to be supported in kernels down the line, as im considering a bump from my current 2.6.30 kernel upwards for my project.
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May 19, 2011
m-a a-i virtualbox-ose-source doesn't work, every other method I searched failed, I'm using 2.6.38-6.dmz.1-liquorix-amd64
Here the error log:
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Jun 2, 2011
I tried to update Linux kernel (2.6.39) but after installation procedure PC won't boot into NEW kernel, I get only BLANK screen, but hopefully older kernel works just fine (2.6.38-9), how to fix it, that I can fluently boot into 2.6.39?
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Oct 4, 2009
I had been testing the this link Raid Setup
I can do this in the installation phase, no issue, but I have to know how to make it in a production server.
I follow, read and test the article 3 times without any success, went I try to boot my machine with the raid disk it show error about that cannot find my root "/dev/root"
mount: could not find filesystem '/dev/root'
...
setuproot : moving /dev failed: no such fie or directory
no fstab.sys
[Code]....
But I still don't know what I have done wrong, this is my 3rd time that I try this without any luck, I'm running Centos 5.3 updated. Both disk are the same size.
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Feb 23, 2010
I been trying all day to compile a kernel i downloaded from http://www.kernel.org/ (2.6.32.8 )Following this help thread viewtopic.php?t=4468.When i invoke make xconfig i'm just kinda lost at that point. Not really sure what to do, so i just save it as is and then compile/install.when i try to boot the kernel, a kernel panic happens saying it can't not mount the root partition.So i am sure i am missing a step with the xconfig part but not sure what.
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Jun 18, 2011
This is (I'm sure) a silly question, but when reading the guide for custom kernel [url] it mentions I need to use yumdownloader to pull the source as an RPM.
How exactly do I find mirrors etc for this (and where do I configure it)?
I've already got the source locally along with the patches I want to use, and want to try this the 'fedora' way. I'd normally just use make/make modules etc, but I've never tried it via RPM.
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Apr 2, 2010
I wasn't using my laptop for at least a few hours, but when I looked at it, it had seemed to crash. I am hoping to figure out what caused this, and to prevent it from happening again. I believe it has something to do with drm or b43 as that is what I could decipher from the screen. I have checked some logs and found nothing irregular. I do not want this to happen again. I am running kernel 2.6.33.1 with no patches and a custom config tailored to my processor. The reason I am running 2.6.33.1 is because of support for my Wifi.
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Aug 1, 2010
I would like to try and optimize my kernel a bit. Since I am doing this on a fresh install, I don't really care if the os gets bricked in the process, and I am sure I can bring it back if I can boot into a recovery console from the old kernel. So, I followed thispost. I patched it and copied and edited a config file from /boot/, saved it as .config, I tried it several times with both removing and not removing /debian and /debian.master directories from the source, yet I always get the same error when I run "make oldconfig".
Code:
$ make oldconfig
scripts/kconfig/conf -o arch/x86/Kconfig
*** Error during writing of the kernel configuration.
make[1]: *** [oldconfig] Error 1
[Code]...
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Oct 7, 2010
Had a custom kernel (2.6.35.5) running under Slackware 12.1 and also the same kernel on an Ubuntu 10.04 machine just fine, however after a clean install of Slackware 13.1 this kernel no longer works (This kernel was re-compiled with the same .config file under Slack 13.1) as I keep getting the the following: -Please append a correct "root=" boot option Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,3) The strange thing is it keeps looking for the root file system in hda1, however the stock 13.1 kernel finds it in /dev/sda1 so the root partition is /dev/sda1 in lilo and the harddisk is known as /dev/sda.
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Nov 8, 2009
I am trying to update my fedora 8 kernel, is there a way to do that? I build the one of kernel.org but when i want to boot it a get a lot of messages like:
mount: cant find /dev/root
I tried to follow the guide at building a custom kernel for fedora, but thats just for the last supported version of the kernel of fedora 8.
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May 16, 2010
i just upgraded myself with all available packages from the kde-testing, and fedora-updates-testing repo's. i am dealing with one problem..... i am running kernel:
Code:
@localhost ~]$ uname -r
2.6.32.10-44.fc11.i686.PAE
however,, there are no kmod-wl packages for that kernel, so i have no wireless at the moment. how do i build / obtain kmod-wl package for my kernel? rebuilding the kmow-wl src packages does occure in build for an older kernel:
the command
Code:
rpmbuild -ba --target=`uname -m` wl-kmod.spec
results in:
Code:
Checking for unpackaged file(s): /usr/lib/rpm/check-files /home/-/rpmbuild/BUILDROOT/wl-kmod-5.60.48.36-1.fc11.4.i386
Wrote: /home/-/rpmbuild/SRPMS/wl-kmod-5.60.48.36-1.fc11.4.src.rpm
Wrote: /home/-/rpmbuild/RPMS/i686/kmod-wl-PAE-5.60.48.36-1.fc11.4.i686.rpm
Wrote: /home/-/rpmbuild/RPMS/i686/kmod-wl-2.6.30.10-105.2.23.fc11.i686.PAE-5.60.48.36-1.fc11.4.i686.rpm
Wrote: /home/-/rpmbuild/RPMS/i686/wl-kmod-debuginfo-5.60.48.36-1.fc11.4.i686.rpm
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Jul 4, 2009
When I build the kernel 2.6.30 source, the rpm package is very big and needed or root filesystem 800-900 Mb. I use "make rpm" as described in Configure, Build and Install a Custom Linux Kernel - openSUSE.
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May 28, 2010
I've about 5.5GB of free space....whenever I try to compile the kernel my system runs out of space...says zero bytes remaining maybe I din't configure it that well I cant exactly figure out which drivers/modules I need in order to obtain a working kernel.
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Dec 22, 2010
All I want is a lxde based desktop to play with and tweak. The problem is that I am using rather esoteric hardware. An xcore86 device on chip to be precise. I have a custom kernel in deb format, and I managed to install UNR 9.10 and then install the custom kernel. Strip out as much obvious gnome stuff and install an lxde desktop. Now this is a quite good solution but still leaves me with a lot of junk that I am not sure I need. 2 ideas occurred to me. Install lubuntu and then install the custom kernel(this failed to work because lubuntu's kernel refused to play nicely with the xcore) or do a minimal install and work my way up adding the things that I wanted. (Again this ground to a halt when the screen went blank)
I looked at unetbootin to try and put in a custom kernel but to a novice like myself it did not work very well.Can anyone help, either a list of everything that can be removed safely from a UNR install to leave me with a minimal install, or a way to insert a custom kernel into a lubuntu iso?
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May 1, 2011
I'd like to create a custom squeeze kernel. Is it a really bad idea to edit to edit the kernel config file directly instead of using "make config", "make menuconfig" or "make gconfig"? My problem is I missing a search function, for example in "make menuconfig" and cannot find some entries.
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Apr 6, 2011
I have a strange and inexplicable problem I've never had before - I can play audio as usual from the terminal on Fedora 14 with my custom 2.6.38 kernel. But, when I log into GNOME, any attempt to use an application that uses audio gives me a "permission denied". The "Sound preferences" shows a dummy output device and no entry in the "hardware" section. Using the distro kernel and a 2.6.33.7-rt kernel from planet ccrma works fine.
Is there anything I'm supposed to build into the kernel that Fedora 14 requires that wasn't a requirement for earlier versions?
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Jan 16, 2010
I am using uuntu 8.04 and I am trying to make live cd with running kernel. I know that there is documentation in ubuntu website in "how to make live cd" but the thing is this is my custom kernel. I have my own configuration. So I want this kernel to be work in live cd.
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Feb 12, 2011
I have a custom built 2.6.37 kernel where I have most of my devices compiled into the kernel. The only modules are related to nouveau (in case I want to go back to proprietary nvidia) and sound drivers. Everything seems to be running fine. However, in /proc/acpi, I'm missing a number of entries, such as thermal_zone/, dsdt, etc. I do have ac_adapter/, battery/, button/, event, processor/ and wakeup. I've gone through what I think is a very detailed review of my kernel config, and I can't find where I've missed something ACPI related. Here is my kernel config with the ACPI section.
Code:
# Power management and ACPI options
CONFIG_ARCH_HIBERNATION_HEADER=y
CONFIG_PM=y
# CONFIG_PM_DEBUG is not set
CONFIG_PM_SLEEP_SMP=y
CONFIG_PM_SLEEP=y
CONFIG_SUSPEND_NVS=y
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
CONFIG_HIBERNATION=y .....
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Jun 26, 2011
I compiled my own custom kernel for the first time. I tinkered with different options, nothing to difficult. I actually didn't expect it to work the first time.
I had kept the original lilo boot config just in case something was to go wrong. Now when I try to boot the system, I always get a "VFS: cannot mount root system on (8,3)". I googled this and found that my kernel did not support my root filesystem (btrfs). So I made an initrd with btrfs kernel module, but it didn't help. I then got a string of errors about how /dev could not be mounted.
My question is two-fold. First, how come when I configure the system back to when it was first installed, it still won't boot? Im using the same kernel (2.6.37.6-smp). Second, how can I get myself out of this rut without reinstalling?
lilo.conf
Code:
lba32
append=" vt.default_utf8=0"
boot=/dev/sda
vga = normal
# Linux - Slackware
image = /boot/vmlinuz-huge-smp-2.6.37.6-smp
root = /dev/sda3
label = Linux
read-only
BTW, I have been maintenancing the system by chrooting into the device off of my slackware boot disk. Im on slack 13.37
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