Re: udev, ttys, and other pseudo-devices
On Thu, 2004-04-22 at 18:59, Luke A. Kanies wrote:
> Hi all,
> I'm trying to get udev to work on Debian unstable, and although I've kind
> of succeeded I still don't have a functional system.
> I can now successfully boot and log in via SSH, but to do so I have to
> manually create /dev/console (otherwise I get a kernel panic when init
> runs), /dev/null (many things need this), and /dev/urandom (for ssh).
> Well, I'm not manually creating them really; I've added them to
> M console c 5 1
> M null c 1 3
> M urandom c 1 9
> Actually, I had to mount the root filesystem while booted off CD and
> create these devices in a real /dev because init starts udev, udev
> normally creates /dev/console, and /dev/console is required by init, which
> results in the above-mentioned kernel panic. The only way I could find
> around that was to have the /dev/console device exist on the root disk,
> which seems like a hack and is probably going to hurt me eventually.
> I'm still missing many important device files, though, the most important
> being some kind of terminal device so I can run getty or fbgetty. This is
> what my /dev looks like right now:
> luke@culain(0) $ ls /dev
> MAKEDEV cdroms initctl mapper ptmx scsi shm sr0 st0l
> agpgart console input misc pts sg0 snd st0 st0m
> audio hci_vhci log null radeon sg1 sound st0a urandom
> luke@culain(0) $
> No vcs devices, no tty devices. In /etc/udev/rules.d I have compat.rules
> and devfs.rules linked, and I've uncommented the TTY lines from
> compat.rules. Checking /var/log/daemon.log shows that udev is reading the
> files, but it's only creating snd devices and nothing else.
> I have sysfs mounted and can see tty devices in /sys. DevFS is no longer
> Also, udev seems to be ignoring the udev.permissions files; I have
> specific permissions marked for a few devices and they are not getting
> those permissions.
> I have not yet started on getting X to work, as I imagine that's even more
> painful than getting getty to work, but I really do need those ttys or
> something equivalent (I'm fine changing /etc/inittab to reflect different
> I've read every post about udev and ttys about 10 times, but it just seems
> to work for everyone else. Any ideas on where I should look, what I can
> check? udevinfo -p does not list any terminal devices, so it doesn't know
> about them at all, but when I log in via ssh the /dev/pts/[0-9]* devices
> correctly get created.
> Is there a standard, documented way of forcing those tty or vcs devices to
> get created? Is there a driver I'm missing? A missing driver doesn't
> seem to be the problem, as I've got stuff in /sys/class/tty (including
> 'console', which would imply I shouldn't have to create it manually).
> Help? Please?
You need: patch-2.6.6-rc2, 2.6.6-rc2-mm1 and 2.6.6-rc2-love1.
> It's very hard to predict things . . . Especially the future."
> -- Prof. Charles Kelemen, Swarthmore CS Dept.