[Bug 79004] [BDW]the monitor cannot display X window after running command "xinit"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79004

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |NOTOURBUG
           Assignee|mika.kuoppala at intel.com     |intel-gfx-bugs at lists.freede
                   |                            |sktop.org

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
It's a nasty bug.

diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index 2bd78e2ac8ec..a7bdc4b21b49 100644
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -684,7 +684,8 @@ int vt_ioctl(struct tty_struct *tty,
                        console_unlock();
                        if (ret)
                                break;
-                       set_console(arg);
+                       if (set_console(arg))
+                               ret = -EIO;
                }
                break;


Turns the indefinite hang into a detectable error (and prevents X from
starting) when the bug occurs.

This needs to be sent upstream.

Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Jiri Slaby <jslaby at suse.cz>
linux-kernel at vger.kernel.org

and bugzilla.kernel.org

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