boot menu option to disable graphics mode

[Andriy Gapon]

on 07/06/2012 11:47 Konstantin Belousov said the following:
> On Thu, Jun 07, 2012 at 10:45:26AM +0300, Andriy Gapon wrote:
>>
>> It's long been a wish of mine to have an ability to decide at boot time that a
>> system should boot in "console-only" mode.  That is, that no graphics/X
>> applications like e.g. xdm/kdm/gdm are automatically started even when they are
>> configured to do so.
>>
>> Here is my attempt at implementing that:
>> https://gitorious.org/~avg/freebsd/avgbsd/commit/96f7051d63d4286ef6f0196d241e7855338a6ed7?format=patch
>>
>> All the option does at boot time is setting of 'inhibit_gui' variable for kernel
>> environment.  I envision that this variable could be properly and gracefully
>> handled in various startup scripts and/or application startup logic.
>> But to ensure that the option is always honored I've also added "ultimate
>> protection" to syscons that prohibits KDSETMODE/KD_GRAPHICS ioctl.
> This is too much, IMO. I understand why you may want to disable
> auto-start of login manager, but preventing a user from running X at all
> until she learns about kenv -u _and_ obscure code somewhere in the kernel,
> is unreasonable.

A user doesn't have to select the option unless he needs to.
A "simple user" can just reboot without selecting the option to get back his X.
A user doesn't have to learn anything about the code, just about kenv and
"magic" inhibit_gui variable.

IMO.

-- 
Andriy Gapon