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Author Topic: AmiWest 2017 clarifications  (Read 4378 times)

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Offline Spectre660

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Re: AmiWest 2017 clarifications
« on: October 27, 2017, 11:46:34 PM »
@Steve

Any plans to look into the X5000 CMI8738 Sound Card issues ?
The CMI cards seem to be the the models in greatest supply .

The  PCIex1 version issue is probably related to the Asmedia 1083 bridge  chips (Revision 1) but may be able to be  be overcome in the driver.  Case in point I have an Envyht24 pciex1 card with an Asmedia 1083  revision 1 bridge chip that works on my X5000 with AmigaOS 4.1FE with   no problems.

The PCI CMI8738 cards (which do not have a bridge chip) also have an issue as some models work and others do not.
I am using a PCI CMI8738 in my X5000 with no problems with AmigaOS 4.1FE
Or could the  the problem actually be with some X5000's ? and not with others ?


See the following thread if you have not seen it already .
http://forum.hyperion-entertainment.biz/viewtopic.php?f=57&t=3625
« Last Edit: October 27, 2017, 11:49:18 PM by Spectre660 »
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Offline Spectre660

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Re: AmiWest 2017 clarifications
« Reply #1 on: October 30, 2017, 05:45:56 PM »
That is quite unfortunate .

Quote from: ssolie;832367
I don't know of anybody looking into this problem at the moment.
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Offline Spectre660

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Re: AmiWest 2017 clarifications
« Reply #2 on: October 31, 2017, 01:45:48 AM »
If you saw my first post on the subject  in this thread you will see that there are quite a few results with different models of cards that are not consistent.
the buggy bridge chip works perfectly with a different PCIEx1 sound card (Envyht24) and its driver and also some PCI CMI878 cards (no bridge chip) work perfectly while other PCI versions of the the CMI8738 (no bridge chip) do not .
The CMI8738 versions exist currently in good quantity so it may be worth having thorough look at the driver .
This is one area that may be diminishing the X5000 experience among new users as some are receiving their systems with problem versions of the CMI8738 cards.
 

Quote from: Hans_;832445
From what I heard, some CMI8738 sound cards have a serious bug on their PCI-to-PCIe bridge chip. It generally isn't a problem on true PCI systems, but causes trouble when there's a PCIe to PCI bridge in-between (e.g., like on the X5000).

There are CMI8738 cards with a fixed bridge chip, but it's impossible to know ahead of time which one you'll get. So, basically a lottery.

I don't think that trying to work around this issue is worth it. It would be far better to find a genuine PCIe sound card and write drivers for that.

Hans
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Offline Spectre660

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Re: AmiWest 2017 clarifications
« Reply #3 on: October 31, 2017, 09:05:19 AM »
It actually does uses the version 1. See the Ranger Screen grabs from the post below.
http://forum.hyperion-entertainment.biz/viewtopic.php?f=57&t=3625&start=40#p41538


Quote from: Hans_;832455
Well, I'm just repeating what I've heard. That PCIe bridge chip's IRQ bug is described as "fatal" with "no useful OS workarounds possible." Perhaps your Envyht24 is using a newer revision of that bridge chip, or maybe you're just very lucky.

I can't comment on any other issues.



Now that everyone is aware of the issue, vendors can choose a different card that's known to work.

Hans
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Offline Spectre660

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Re: AmiWest 2017 clarifications
« Reply #4 on: October 31, 2017, 08:12:04 PM »
As seen with Acill's soundblaster with the Amiwest MorphOS demo things can get be dodgy on the MorphOS side too .
Interestingly with my X5000 my PCI CMI8738 works with no problems under AmigaOS 4.1FE  but causes a freeze under Linux if used with full screen video.
The issue is to get a working solution for which the availability of the sound cards does not dry up .

It may take a third party approach like the RadeonHD driver to keep up though unless there is a move to Radeon HD audio or USB sound cards .
« Last Edit: October 31, 2017, 08:25:17 PM by Spectre660 »
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Offline Spectre660

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Re: AmiWest 2017 clarifications
« Reply #5 on: November 01, 2017, 12:17:54 AM »
The chips seem to have have markings that indicate the versions.
My version 1's end with 1B1
My version 3 ends with 1B2


Quote from: Hans_;832489
Assuming that they correctly updated the revision register between chip revisions... (stuff like this is so easy to forget).

Hans
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Offline Spectre660

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Offline Spectre660

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Re: AmiWest 2017 clarifications
« Reply #7 on: November 08, 2017, 04:11:55 PM »
http://amigaworld.net/modules/newbb/viewtopic.php?topic_id=39511&forum=14#744313

Quote from: Hans_;832445
From what I heard, some CMI8738 sound cards have a serious bug on their PCI-to-PCIe bridge chip. It generally isn't a problem on true PCI systems, but causes trouble when there's a PCIe to PCI bridge in-between (e.g., like on the X5000).

There are CMI8738 cards with a fixed bridge chip, but it's impossible to know ahead of time which one you'll get. So, basically a lottery.

I don't think that trying to work around this issue is worth it. It would be far better to find a genuine PCIe sound card and write drivers for that.

Hans
Sam460ex : Radeon Rx550 Single slot Video Card : SIL3112 SATA card