ubuntu 9.10 virtual console issue


 
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Operating Systems Linux Ubuntu ubuntu 9.10 virtual console issue
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Old 02-26-2010
ubuntu 9.10 virtual console issue

i'm having a frustrating issue with virtual consoles on my ubuntu 9.10 setup
i was having trouble accessing the virtual consoles at all (no visible display) so i installed XDM and set it as the default X login manager)
now when i hit ctl-alt F1-F6 instead of the usual getty (login prompt) i get
authentication failure

authentication failure

authentication failure

(the message shows about 11 times)
and no way to log in

what is going wrong and how can i fix this?
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CONSOLE(4)						     Linux Programmer's Manual							CONSOLE(4)

NAME
console - console terminal and virtual consoles DESCRIPTION
A Linux system has up to 63 virtual consoles (character devices with major number 4 and minor number 1 to 63), usually called /dev/ttyn with 1 <= n <= 63. The current console is also addressed by /dev/console or /dev/tty0, the character device with major number 4 and minor number 0. The device files /dev/* are usually created using the script MAKEDEV, or using mknod(1), usually with mode 0622 and owner root.tty. Before kernel version 1.1.54 the number of virtual consoles was compiled into the kernel (in tty.h: #define NR_CONSOLES 8) and could be changed by editing and recompiling. Since version 1.1.54 virtual consoles are created on the fly, as soon as they are needed. Common ways to start a process on a console are: (a) tell init(8) (in inittab(5)) to start a mingetty(8) (or agetty(8)) on the console; (b) ask openvt(1) to start a process on the console; (c) start X -- it will find the first unused console, and display its output there. (There is also the ancient doshell(8).) Common ways to switch consoles are: (a) use Alt+Fn or Ctrl+Alt+Fn to switch to console n; AltGr+Fn might bring you to console n+12 [here Alt and AltGr refer to the left and right Alt keys, respectively]; (b) use Alt+RightArrow or Alt+LeftArrow to cycle through the presently allocated consoles; (c) use the program chvt(1). (The key mapping is user settable, see loadkeys(1); the above mentioned key combinations are according to the default settings.) The command deallocvt(1) (formerly disalloc) will free the memory taken by the screen buffers for consoles that no longer have any associ- ated process. Properties Consoles carry a lot of state. I hope to document that some other time. The most important fact is that the consoles simulate vt100 ter- minals. In particular, a console is reset to the initial state by printing the two characters ESC c. All escape sequences can be found in console_codes(4). FILES
/dev/console /dev/tty* SEE ALSO
chvt(1), deallocvt(1), loadkeys(1), mknod(1), openvt(1), console_codes(4), console_ioctl(4), tty(4), ttyS(4), charsets(7), agetty(8), init(8), mapscrn(8), mingetty(8), resizecons(8), setfont(8) COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 1994-10-31 CONSOLE(4)

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