xsrc/46991: can't switch consoles when in X

[martin%NetBSD.org@localhost]

>Number:         46991
>Category:       xsrc
>Synopsis:       can't switch consoles when in X
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    xsrc-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Sep 20 15:30:00 +0000 2012
>Originator:     Martin Husemann
>Release:        NetBSD 6.99.11
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD beasty.aprisoft.de 6.99.11 NetBSD 6.99.11 (NIGHT-OWL) #111: Thu 
Sep 20 17:01:29 CEST 2012 
martin%beasty.aprisoft.de@localhost:/usr/src/sys/arch/amd64/compile/NIGHT-OWL 
amd64
Architecture: x86_64
Machine: amd64
>Description:

I just upgraded this machine (previously running -current from about a week
ago) and can not switch virtual consoles any more. Xev shows:


KeyPress event, serial 34, synthetic NO, window 0x1600001,
    root 0x113, subw 0x0, time 262200, (168,0), root:(879,354),
    state 0x0, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 34, synthetic NO, window 0x1600001,
    root 0x113, subw 0x0, time 262225, (168,0), root:(879,354),
    state 0x4, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 34, synthetic NO, window 0x1600001,
    root 0x113, subw 0x0, time 262677, (168,0), root:(879,354),
    state 0xc, keycode 68 (keysym 0x1008fe02, XF86_Switch_VT_2), same_screen 
YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 34, synthetic NO, window 0x1600001,
    root 0x113, subw 0x0, time 262878, (168,0), root:(879,354),
    state 0xc, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 34, synthetic NO, window 0x1600001,
    root 0x113, subw 0x0, time 262895, (168,0), root:(879,354),
    state 0x4, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

but no console switch occurs. Gettys are running on ttyE*.

Graphics hardware:
vga0 at pci1 dev 0 function 0: vendor 0x1002 product 0x68e0 (rev. 0x00)

Xorg logs:

[    20.647] (II) RADEON: Driver for ATI Radeon chipsets:
...
[    21.030] (II) RADEON(0): Using 8 bits per RGB (8 bit DAC)
...
[   135.556] Failed to switch from vt05 to vt02: Device busy


>How-To-Repeat:
no idea

>Fix:
please