+++ /dev/null
-Troubleshooting udev for dev on Red Hat distro
-
-1) Make sure you have a rescue disk/cd in case you hose your machine. You've
- been forewarned.
-2) Grab latest udev tarball or clone udev bitkeeper tree
- (bk://linuxusb.bkbits.net.udev)
-3) Follow README and HOWTO-udev_for_dev documents
-
-The following is some additional help to get udev for dev up and running on RH.
-
-Q. I login as my normal self from the login screen and RH just hangs on an
- empty blue screen. What's wrong?
-
-A. You have some wrong permissions. I'm guessing you can probably log in as root
- but not as your normal user. Basically you need to set the right
- permissions with a rule. Setting the correct permissions to null and urandom
- allowed me to login as myself and not at root.
-
- While you are there you might want to set the permissions to ptmx as well
- or you may have trouble getting a bash prompt in an xterm. Also refer to the
- next question.
-
-Q. I'm having trouble getting a bash prompt from my xterm. i.e. I bring up a
- terminal and all I have is a blank screen with a blinking cursor.
-
-A. First make sure you have the correct permissions set for ptmx. See above
- Q&A for help on this. But I'm guessing that something is wrong with your
- /dev/pts, thanks Captain Obvious, heh:) You probably have devpts mounted
- to /dev/pts from /etc/fstab. I'm also guessing that you have sysfs mounted
- to /sys from /etc/fstab as well. If this is the case then the line in
- /etc/rc.sysinit
-
- action $"Mounting local filesystems:" mount -a -t nonfs,smbfs,ncpfs -O no_netdev
-
- will have mounted these for you. As a result you placed your call to
- start_udev directly after this because the HOWTO-udev_for_dev document
- told you to insert start_udev after /proc and /sys have been mounted.
- Well start_udev actually overwrites /dev thus anything you had mounted in
- /dev prior to start_udev being called will be blown away. So basically,
- you mounted devpts to /dev/pts because everything in /etc/fstab was mounted
- and then it was blown away by calling start_udev. A simple fix is to remove
- the mount devpts line from /etc/fstab and mount it after calling start_udev.
- I did the following:
-
- action $"Mounting local filesystems:" mount -a -t nonfs,smbfs,ncpfs -O no_netdev
- /etc/rc.d/start_udev
- action $"Mounting devpts: " mount -t devpts none /dev/pts
-
- After doing so I rebooted and was able to get my prompt from my xterm.
-
-Q. I'm getting some error messages during boot. How do I get rid of them?
-
-A. For me it was a matter of setting up Symlinks. Basically, some /dev entries
- were being looked for and not being found so an error was thrown. For example,
- /dev/cdrom was needed but udev had named it /dev/hdc by default. Basically I
- edited my /etc/udev/udev.rules file to create a symlink from /dev/cdrom to
- /dev/hdc and my error went away.
-
-These are some of the things I ran into. NOTE: I hosed my machine more than once
-trying to figure this out and a rescue disk was my best friend. If you have any
-other experiences and would like to add to this Q&A list feel free to send me a
-patch (ogasawara@osdl.org). Hopefully this helped someone. Thanks.