When using the boot option 'noapictimer', 'noapic' is also triggered. You'll find a line ACPI: Skipping IOAPIC probe due to 'noapic' option. in your gmesg output, even if apic is enabled by default. This is because of line 340/341 of arch/x86_64/kernel/setup.c (from gentoo-sources-2.6.12-r9): if (!memcmp(from, "noapic", 6)) skip_ioapic_setup = 1; The if statement ist also true with 'noapictimer'. Using 'noapictimer apic' does not do the trick. This enables apic and apic timer. As a workaround I'm using the patch from comment 34 of http://bugzilla.kernel.org/show_bug.cgi?id=3927, but i'm not sure, this is the correct way to solve the problem finally. Reproducible: Always Steps to Reproduce: Portage 2.0.51.22-r2 (default-linux/amd64/2005.0, gcc-3.4.4, glibc-2.3.5-r1, 2.6.12-gentoo-r9 x86_64) ================================================================= System uname: 2.6.12-gentoo-r9 x86_64 AMD Turion(tm) 64 Mobile Technology ML-34 Gentoo Base System version 1.6.13 ccache version 2.3 [enabled] dev-lang/python: 2.3.5 sys-apps/sandbox: 1.2.12 sys-devel/autoconf: 2.13, 2.59-r6 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6 sys-devel/binutils: 2.15.92.0.2-r10 sys-devel/libtool: 1.5.18-r1 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="amd64" AUTOCLEAN="yes" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=k8 -O3 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.4/env /usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-march=k8 -O3 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig ccache distlocks sandbox sfperms strict" GENTOO_MIRRORS="http://pandemonium.tiscali.de/pub/gentoo/ http://gd.tuwien.ac.at/opsys/linux/gentoo/ ftp://gd.tuwien.ac.at/opsys/linux/gentoo/ http://mir.zyrianes.net/gentoo/ http://194.117.143.72 http://ftp.du.se/pub/os/gentoo http://mirror.switch.ch/mirror/gentoo/ http://ftp.uni-erlangen.de/pub/mirrors/gentoo http://ftp.ntua.gr/pub/linux/gentoo/ http://ftp-stud.fht-esslingen.de/pub/Mirrors/gentoo/" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.de.gentoo.org/gentoo-portage" USE="amd64 X acpi alsa arts avi bash-completion berkdb bitmap-fonts bzip2 cdr crypt cups doc dvd dvdr eds encode fam fbcon foomaticdb gdbm gif gpm gstreamer gtk gtk2 ieee1394 imlib jpeg kde lzw lzw-tiff mad mp3 mpeg ncurses nptl opengl pam pcmcia pcre pdflib perl png python qt quicktime readline sdl ssl symlink tcpd tiff truetype truetype-fonts type1-fonts unicode usb userlocales vi wifi xml2 xpm xv zlib userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CTARGET, LANG, LC_ALL, LDFLAGS, LINGUAS, MAKEOPTS
I don't see how the patch you mention solves the problem of noapictimer being also interpretred as noapic but I will track the upstream bug anyway
No, the patch does not solve the problem. It is just a workaround for the timer problem without loosing apic functionality. Sorry, I should have been more clear at this point
My Acer Ferrari 4005 laptop is affected by this bug. I have already added a comment on the upstream bug.
*** Bug 108080 has been marked as a duplicate of this bug. ***
upstream bug is closed
