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kern/51769: Accessing /dev/speaker doesn't autoload the spkr driver module

>Number:         51769
>Category:       kern
>Synopsis:       Accessing /dev/speaker doesn't autoload the spkr driver module
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jan 04 07:05:00 +0000 2017
>Originator:     Paul Goyette
>Release:        NetBSD 7.99.53
| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:      |
| (Retired)        | FA29 0E3B 35AF E8AE 6651 | paul at   |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at |
System: NetBSD 7.99.53 NetBSD 7.99.53 (SPEEDY 2016-12-31 23:00:24) #1: Sun Jan 1 01:39:34 UTC 2017 amd64
Architecture: x86_64
Machine: amd64
I think it used to work.  Accessing the /dev/speaker (char device 27,0 on
amd64) would auto-load the spkr module if the driver was not already
built-in or loaded.  But now it doesn't work.
Build a kernel without the spkr driver (but with the usual attachments,
ie pcppi and/or audio).  Boot, and try to write a play-string to the


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