[haiku-bugs] Re: [Haiku] #8588: Regression: Sound card doesn't work
- From: "anevilyak" <trac@xxxxxxxxxxxx>
- Date: Sun, 03 Jun 2012 12:40:24 -0000
#8588: Regression: Sound card doesn't work
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Reporter: drcouzelis | Owner: nobody
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: - General | Version: R1/Development
Resolution: | Keywords: regression
Blocked By: | Blocking:
Has a Patch: 0 | Platform: x86
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Comment (by anevilyak):
Replying to [comment:5 ttcoder]:
> In the past I read here about a temporary workaround for such problems:
removing drivers for devices that are active (and eating up an IRQ each)
until finding the "sweet spot".. Maybe a new driver was introduced between
revs, reorganizing your IRQs.. Or just the IO-APIC interrupt allocation
algorithm..
Drivers make no difference, interrupt allocation is decided at one of two
points: 1) at power-up by the BIOS, or 2) very early in the boot process
during IO-APIC configuration, well before any driver's loaded. The drivers
simply take what they're given. That having been said, IRQ16 is an IO-APIC
interrupt, so the most likely cause for the issue here is the addition of
IO-APIC support. Would be interesting to know if the card works properly
with the latter disabled in the boot menu options.
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Ticket URL: <http://dev.haiku-os.org/ticket/8588#comment:7>
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