Re: Which kernel do you use?

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Am 23.01.2015 um 13:43 schrieb Jeremy Jongepier:
On 01/23/2015 12:59 PM, Hermann Meyer wrote:
Hi Jeremy

Well, I guess the 3.2 RT will work here as well, just kernels > 3.4
started to behave bad.

The main reason I would use later kernels, special >3.18 is, that they
have a big improvement in the nouveau driver. Lately the 3.19.0-rc5
detect my card correct and handle the GPU mem correct.

hermann
Hello Hermann,

Ah nouveau, as I'm using a fairly old nvidia card I'm not having any
issues with nouveau. But I can always try a newer kernel on my setup if
you'd like. Are you using the onboard audio or external gear?

Jeremy


Well, I'm not really having issues with nouveau, just those error messages in dmesg

[   21.627203] [drm] nouveau 0000:01:00.0: illegal object class: 0xa0b5
[ 21.627208] [drm] nouveau 0000:01:00.0: Error creating object: -22 (3/0x0000a0b5)
[   21.627212] [drm] nouveau 0000:01:00.0: illegal object class: 0x90b8
[ 21.627215] [drm] nouveau 0000:01:00.0: Error creating object: -22 (3/0x000590b8)
[   21.627218] [drm] nouveau 0000:01:00.0: illegal object class: 0x90b5
[ 21.627221] [drm] nouveau 0000:01:00.0: Error creating object: -22 (3/0x000490b5)

Which didn't appear with newer Kernels.
Also, I'm just curious about what going on in the newer Kernels, as, when I set up this MOBO, it's a work station, no wireless, I've to move down the road to older kernels, till I end up at 3.4.104, as the first one which works smooth. I use a PCI Creative Labs SB Audigy, onboard sound is disabled, but the Nvidia Card provide a Audio output as well. I've connected my Monitor via HDMI cable.

With kernel 3.4.104 I can use pulseaudio(sink) in jack down to 128 frames/period without Xruns, but with younger kernels, Xruns appear randomness, regardless of use even if pulse is suspend and just jack runs with a dsp load of 0.33%. I've set CPU freq to performance (in kernel config), I ensure that the soundcard own his own IRQ, boost the priory of it, disable hyper-threading, disable irqbalancing, but nothing helps. Non of this tweaks is needed for the 3.4.104/5 - rt kernels. They work out of the box, even when my soundcard share a IRQ with a USB hub, no problem at all.

However, as I said, I'm just curios about what others here use, I'm perfectly fine with 3.4.105-rt129, but still I would experiment more with recent kernels, and I like to find out what cause the Xruns, as I like to use a newer nouveau driver, .

regards
hermann
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