From mboxrd@z Thu Jan 1 00:00:00 1970 From: Len Brown Subject: RE: Interrupt routing problem Date: 05 Jan 2004 23:10:51 -0500 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <1073362251.2419.21.camel@dhcppc4> References: <3ACA40606221794F80A5670F0AF15F8401720C75@PDSMSX403.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <3ACA40606221794F80A5670F0AF15F8401720C75-SRlDPOYGfgogGBtAFL8yw7fspsVTdybXVpNB7YpNyf8@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Luming Yu Cc: Nils Faerber , ACPI Developers List-Id: linux-acpi@vger.kernel.org Nils, First try acpi=off to completely remove ACPI from the picture. If the USB issues are still with you, then you know it has nothing to do with ACPI. If the USB issues did go away, then there is surely at least an ACPI related issue, probably an ACPI bug. If so, try booting with pci=noacpi to disable ACPI interrupt routing. without your dmesg I can't tell if this would have any effect or not, but it may. You'll be able to tell from a different /proc/interrupts. But with a PIC-mode box chances are good that everything will remain piled onto a single IRQ and this will make no difference. Depending on your hardware, acpi_irq_balance, perhaps with acpi_irq_pci=... could distribute some devices off IRQ9. However, IRQ9 is only the 5th most active entry, so this may not help. if you were receiving ACPI events with an interrupt-level performance issue, that could be a cause. Check /var/log/acpid to see if ACPI itself is getting any events. thanks, -Len On Sun, 2004-01-04 at 21:17, Yu, Luming wrote: > >strange phenomenons concerning USB with this setup, i.e. devices > >suddenly getting disconnected and reconnected again, HUBs beeing > >disabled altogether, ports being disabled and so on; and yes, using > uhci > >instead of usb-uhci does not help any. > > How did you know this is caused by sharing IRQ 9? > > What is the exact failure that causes? > > > >So my question is if I can "help" my kernel somehow to distribute the > >IRQs in a more clever way. > > You can try boot with acpi_irq_balance option. > > --Luming > > > ------------------------------------------------------- > This SF.net email is sponsored by: IBM Linux Tutorials. > Become an expert in LINUX or just sharpen your skills. Sign up for IBM's > Free Linux Tutorials. Learn everything from the bash shell to sys admin. > Click now! http://ads.osdn.com/?ad_id78&alloc_id371&op=click > _______________________________________________ > Acpi-devel mailing list > Acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org > https://lists.sourceforge.net/lists/listinfo/acpi-devel ------------------------------------------------------- This SF.net email is sponsored by: IBM Linux Tutorials. Become an expert in LINUX or just sharpen your skills. Sign up for IBM's Free Linux Tutorials. Learn everything from the bash shell to sys admin. Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click