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Description of Problem: With Alpha UP1100 and its built-in sound card I am getting with 2.2.19aa2 the following: Trident 4DWave/SiS 7018/Ali 5451 PCI Audio, version 0.14.6a, 19:28:59 Apr 30 2001 trident: ALi Audio Accelerator found at IO 0x10000, IRQ 10 ac97_codec: AC97 codec, vendor id1: 0x0000, id2: 0x0000 (Unknown) ac97_codec: Secondary ac97 codec not present trident: Running on Alpha system type Nautilus and I can play various sounds and CDs. With a kernel 2.4.3-7 from RC1 I see this: Trident 4DWave/SiS 7018/ALi 5451 PCI Audio, version 0.14.6, 16:08:06 May 21 2001 trident: ALi Audio Accelerator found at IO 0x8000, IRQ 10 ac97_codec: AC97 codec, id: 0x0000:0x0000 (Unknown) ac97_codec: Secondary ac97 codec not present and there is not a single peep. How Reproducible: Seems to be a property of all 2.4 kernels I tried so far. Sigh! Michal michal@harddata.com
The problem is that a "generic" Alpha kernel on Nautilus does not have a proper initialization code for a Nautilus sound card. A copy of this code from 2.2.19 kernel solves the problem. Header comments clearly show that DRIVER_VERSION define was forgotten in updates. This patch is done with 2.4.5-ac13 kernel but it will fit trident.c in all 2.4.x, so far, kernels possibly with some offsets. The patch will be submitted on linux-kernel list and is attached. My patched kernel plays now very loudly. :-)
Created attachment 21142 [details] A patch for missing sound on Nautilus machines
Added for inclusion in a future erratta kernel (not current one thats being QA'd though this was 2 days ltoo late for that, sorry)