On Thu, 13 Sep 2018 15:48:11 -1000 "David W. Jones" <gnome@xxxxxxxxxxxxx> wrote: >On September 13, 2018 1:13:12 PM HST, Tim <termtech@xxxxxxxxxx> wrote: >> >> >> On 09/13/2018 05:26 PM, Niklas Reppel wrote: >> > Hi, >> > >> > i recently updated my Arch linux system, to to the following >> version: >> > >> > Linux 4.18.6-arch1-1-ARCH #1 SMP PREEMPT >> > >> > Afterwards, i noticed that something has changed regarding the >> realtime >> > permissions >> > and that i had to install a new package called >> 'realtime-priviliges', >> > which i never needed before, >> > and subsequently add my main user to the 'realtime' group. >> > >> > In that wake, i updated the processor microcode, which i didn't use >> at >> > all before (there always was some >> > error message during bootup, but nothing else). >> > >> > After being able to start JACK in realtime again, i felt that there >> was >> > a significant loss of performance. >> > Things that didn't cause any dropouts before now start to crackle >> and >> > gristle (as a sidenote, i mostly >> > use SuperCollider to make sound). >> > >> > Also, and this puzzled me especially, there were dropouts, but no >> XRuns >> > ... normally, when i push the >> > system to the limits, i get XRuns, that'd be expected. But now, it's >> >> > dropouts without, and they start way >> > earlier. >> > >> > My machine has an Intel(R) Core(TM) i7-4600U CPU @ 2.10GHz Processor >> if >> > that info is of user for anyone ... >> > >> > Anybody else noticed something like that recently ? >> > >> > Best, >> > nik >> > >> >> Hello, I always reply when I hear of crackles, pops, and dropouts >> because it took me several months to figure out my problem with that. >> Maybe it will help. >> >> Here is the latest time I replied, a month ago, please scroll down: >> >> http://linux-audio.4202.n7.nabble.com/M-Audio-Fast-Track-Pro-unreliable-distorted-recording-td89125i20.html#a106829 >> >> Long story short: Try running with only one processor core active. >> >> It completely cured my problem, and another user's as well. >> In my case the device is a PCI M-Audio delta1010, and in the >> other user's case it was a similar ice1712-based card. >> However in the above Fast-Track-Pro case, that's USB and we >> don't yet know if the trick solved that user's problem... >> >> Be patient: If the number of CPU cores is the cause it may take >> several minutes for the crackling to appear since I believe what >> happens is that some low-level 'counters/pointers' which should >> always be in sync slowly approach and 'pass' each other, and that's >> when the noise occurs. >> >> In my case the very same symptom occurred in Windows. >> That proved beyond doubt that it was a hardware issue. >> >> Hope that helps. >> Tim. > >While I, on the other hand, use all cores (real and hyperthread) on my i7 with no crackles or distorted recordings and such at all. Same for the 4 real cores on my AMD desktop system. > >In my opinion, most PC motherboards weren't designed with any audio thought beyond including an on-board audio chip. > >-- >David W. Jones >gnome@xxxxxxxxxxxxx >authenticity, honesty, community >http://dancingtreefrog.com > >Sent from my Android device with F/LOSS K-9 Mail. Is this only Intel processors that are doing this? I've been running an AMD Ryzen since March and had no problems at all. -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
