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linux-next/drivers/tty/vt
Daniel Vetter 77232f791e vt: Don't check KD_GRAPHICS when binding/unbinding
This was introduced in

commit 6db4063c5b
Author: Antonino A. Daplas <adaplas@gmail.com>
Date:   Mon Jun 26 00:27:12 2006 -0700

    [PATCH] VT binding: Add sysfs control to the VT layer

with the justification

    "In addition, if any of the consoles are in KD_GRAPHICS mode, binding and
    unbinding will not succeed.  KD_GRAPHICS mode usually indicates that the
    underlying console hardware is used for other purposes other than displaying
    text (ie X).  This feature should prevent binding/unbinding from interfering
    with a graphics application using the VT."

I think we should lift this artificial restriction though:
- KD_GRAPHICS doesn't get cleaned up automatically, which means it's
  easy to have terminals stuck in KD_GRAPHICS when hacking around on
  X.
- X doesn't really care, especially with drm where kms already blocks
  fbdev (and hence fbcon) when there's an active compositor.
- This is a root-only interface with a separate .config option and
  it's possible to hang your machine already anyway if you
  unload/reload drivers and don't know what you're doing.

With this patch i915.ko module reloading works again reliably,
something in the recent fedora upgrades broke things.

Cc: Antonino A. Daplas <adaplas@gmail.com>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Acked-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-05-10 19:29:51 +02:00
..
.gitignore
consolemap.c tty: consolemap.c: move assignment out of if () block 2015-05-10 19:04:16 +02:00
cp437.uni
defkeymap.c_shipped
defkeymap.map
keyboard.c tty: pr_warning->pr_warn and logging neatening 2014-11-25 17:06:38 -08:00
Makefile tty: vt/Makefile: set the variables to static 2013-01-15 21:52:24 -08:00
selection.c tty: Fix unsafe vt paste_selection() 2013-07-23 16:47:10 -07:00
vc_screen.c vc: switch to fixed_size_llseek() 2013-06-29 12:57:30 +04:00
vt_ioctl.c vt: vt_ioctl: use msecs_to_jiffies for time conversion 2015-03-07 04:02:26 +01:00
vt.c vt: Don't check KD_GRAPHICS when binding/unbinding 2015-05-10 19:29:51 +02:00