[haiku-bugs] Re: [Haiku] #8588: Regression: Sound card doesn't work
- From: "ttcoder" <trac@xxxxxxxxxxxx>
- Date: Sat, 02 Jun 2012 21:16:49 -0000
#8588: Regression: Sound card doesn't work
--------------------------+----------------------------
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
--------------------------+----------------------------
Comment (by ttcoder):
The (older) working rev says this:
{{{
KERN: HDA: Detected controller @ PCI:0:20:2, IRQ:5, type 1002/4383
(1458/a002)
(...)
KERN: hda: HDA v1.0, O:4/I:4/B:0, #SDO:1, 64bit:yes
KERN: Codec 3 Vendor: 10ec Product: 0888, Revision: 1.0.0.1
}}}
Whereas the (newer) rev fails like thus:
{{{
KERN: HDA: Detected controller @ PCI:0:20:2, IRQ:16, type 1002/4383
(1458/a002)
(...)
KERN: hda: HDA v1.0, O:4/I:4/B:0, #SDO:1, 64bit:yes
KERN: hda: Failed to get vendor and revision parameters
KERN: hda: no active codec
}}}
So the IRQs are allocated very differently. I suppose this explains the
"failed to get vendor/rev parameters" message and subsequent failures
(?).. Someone more knowledgable will have to chime in..
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..
This could help to then wait until a real (final) fix is found.
HTH
--
Ticket URL: <http://dev.haiku-os.org/ticket/8588#comment:5>
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