I've used the article https://wiki.ubuntu.com/DebuggingACPI to try to debug the ACPI problem, and the results were the following:
acpi=off - Working, as I told in the previous email acpi=ht - Also working pci=noacpi - Also working acpi=noirq - Also working pnpacpi=off - This is the only one that keep the same problems (slow mouse, etc.) noapic - Working nolapic - Working So, only the pnpacpi=off has the previous problems. The only conclusion I can get is that the problem is not related to the plug and play code, but I can't figure from the previous results how to narrow down the problem, since every other variant works. It also seems that using nolapic I have more processing reported by the jack control (always using the same applciations open and playing the same drum track on hydrogen, I have a value between 2.2% and 2.5% with all the ACPI options except with nolapic where the values are between 2.6% and 3% Fernando On Sat, May 8, 2010 at 11:37 PM, Fernando Gomes <f.m.go...@gmail.com> wrote: > Hi all and thanks for the tips. The problem seems to be solved (at > least until now) using the option acpi=off. I'm writing this message > on the rt kernel on the same machine that locked up only a few moments > after booting, now it is working for about one hour, running jack, > ZynAddSubFx, Rosegarden, Hydrogen and Rackarrack. Once again thanks > for your advice. > I've tried to look for a newer bios version for this board but I'm > already using the latest version. How this acpi=off option will impact > on the system performance? I will make some more tests using > alternative acpi configurations tomorrow and I'll let you know the > results. > > Best regards > > Fernando > > On Sat, May 8, 2010 at 2:07 PM, Scott Lavender <scottalaven...@gmail.com> > wrote: >> >> On Sat, May 8, 2010 at 5:44 AM, Roy Damen <royda...@gmail.com> wrote: >>> >>> Dear John, >>> >>> On my machine i had a similar problem with rt. After more than 1,5 year of >>> searching, trying out and lots of help with explanation on the ubuntuforums >>> i discovered that it was this BIOS setting that must be turned off: IOAPIC >>> It seems that ubuntu can manage this by itself(if i understood correctly) I >>> bet this solves your problem too! >>> >>> 2010/5/7 jONE <producjo...@gmail.com> >>>> >>>> Hi Fernando I've got an AMD Athlon 64 X2 4000+ processor too and had >>>> problems with the RT kernel since I first installed 8.04 onwards. I tried >>>> pretty much everything until a few days ago, when I simply "loaded >>>> optimized >>>> settings" on my BIOS and believe it or not, no mouse delay and no hanging >>>> at >>>> all. My hammerfall soundcard's delay <10ms recording 16channels. I honestly >>>> don't know what setting in the BIOS messed it up since "optimized settings" >>>> or "default settings" options don't specify much and I've tweaked the thing >>>> so many times I lost track of what the original setting was! Maybe give >>>> that >>>> a try? >>>> Good luck! >>>> >>>> John >> >> I remember several years ago there were some problems with peoples systems >> acting sluggish or freezing with the -rt kernel during Hardy. If I remember >> correctly it had to do with acpi, although I cannot find any of those emails >> on the mailing list. >> >> However, I did find a Ubuntu Studio review by Dave Phillips that also >> mentions the acpi situation: >> http://www.linuxjournal.com/content/judgement-day-studio-dave-tests-ubuntu-studio-904 >> >> Also, this 64Studio forum posts discusses it a little more: >> http://www.64studio.com/node/1111 >> >> Hope this helps. >> >> ScottL >> >> -- >> Ubuntu-Studio-users mailing list >> Ubuntu-Studio-users@lists.ubuntu.com >> Modify settings or unsubscribe at: >> https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users >> >> > -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users