Bug 30917

Summary: t4dwave on Acer Alladin M5451 interrupt problem
Product: Base System Reporter: Aaron Kaplan <aaron>
Component: i386Assignee: freebsd-bugs (Nobody) <bugs>
Status: Closed FIXED    
Severity: Affects Only Me    
Priority: Normal    
Version: 4.4-RELEASE   
Hardware: Any   
OS: Any   

Description Aaron Kaplan 2001-09-29 20:40:00 UTC 
	Running an Acer TravelMate 512TE.
        sound output is only _sometimes_ possible.

        The TravelMate uses an Acer M5451 sound chip. however if I kldload
        snd_t4dwave.ko I sometimes get the message:
         pcm0: play interrupt timeout, channel dead
        
        I highly assume this is because of IRQ sharing between the soundcard
        and the graphics card (both are on IRQ 10), grfx card is:
         ATI Rage Mobility Pro

        On other occasions sound will work - but only for the first time.
        After opening the device and closing it the next open will result 
        in no sound output.

        I did a comparison: 5.0-current works with this laptop. sound plays
        perfectly and every time.

Fix: 

no fix known.
How-To-Repeat: 	share interrupts with sound card.
        kldload t4dwave for an M5451 chip based sound card
        try to play some wav/mp3
Comment 1 greid freebsd_committer freebsd_triage 2001-09-29 20:43:46 UTC 
State Changed
From-To: open->closed

Duplicate of 30808