Emerged gentoo-dev-sources-2.6.0-test10-r1 and built kernel for my system, a Dell Inspiron 4100. When ACPI is enabled, I experience absolutely horrible performance on my network cards, both report as Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] in lspci. Name resolution takes 3-6 seconds and pages are slow loading. mii-tool shows the card as "negotiated 100baseTx-FD flow-control, link ok", which is correct in my environment. Rebooting to 2.6 without ACPI restores card to normal operation. Rebooting to 2.4.20 restores card to normal operation. This issue arose on LKML briefly in October, but I didn't see any resolution there. Hopefully one of you good kernel hackers can help me get this reported and fixed. I'm marking as major severity because 2.6.0 is about to be released. Given the huge number of 3c905 cards out there, this probably ought to be fixed before release. Please reduce to Normal severity if you do not agree....won't hurt my feelings any. Reproducible: Always Steps to Reproduce: 1. Build 2.6.0-test10-r1 with ACPI and Vortex drivers for Inspiron 4100 2. Reboot to new kernel and hit the network....see slow performace 3. Actual Results: Really awful network performance. Expected Results: Network performance equivalent to when ACPI is off. emerge info Portage 2.0.49-r15 (default-x86-1.4, gcc-3.2.3, glibc-2.3.2-r3, 2.6.0-test10-gentoo-r1) ================================================================= System uname: 2.6.0-test10-gentoo-r1 i686 Intel(R) Pentium(R) III Mobile CPU 1133MHz Gentoo Base System version 1.4.3.10p1 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" COMPILER="gcc3" CONFIG_PROTECT="/etc /var/qmail/control /usr/kde/2/share/config /usr/kde/3/share/config /usr/X1 1R6/lib/X11/xkb /usr/kde/3.1/share/config /usr/share/texmf/tex/generic/config/ /usr/share/texmf /tex/platex/config/ /usr/share/config" CONFIG_PROTECT_MASK="/etc/gconf /etc/env.d" CXXFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="sandbox ccache autoaddcvs" GENTOO_MIRRORS="http://gentoo.oregonstate.edu http://distro.ibiblio.org/pub/Linux/distributions /gentoo" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="x86 oss apm avi crypt encode foomaticdb gif jpeg gnome libg++ mad mikmod mpeg ncurses nls pdflib quicktime spell xml2 xmms zlib gdbm berkdb slang readline arts tetex svga tcltk java guile sdl gpm tcpd pam libwww ssl perl python esd imlib gtk motif opengl cdr X cups alsa qt kde scanner pda xv png truetype oggvorbis ldap video_cards_radeon"
I have gentoo-dev-sources 2.6.0-test111 with ACPI enabled on a Thinkpad T40p. The atheros wlan driver was very choppy. (A lot of hardware failure; resetting) After googling a lot I found that the processor module is at fault. If I do not modprobe the processor module, everything is fine: very good throughput. I hope this help.
this should now be fixed in 2.6.1. please test and if you still experience problems log it to this bug and i shall re-open :) thanks
