When viewing certain websites, konqueror (kde 3.2.3) takes forever to render the page when using gentoo-dev-sources-2.6.8 (-r1 and -r3) kernel. Normal fast response is returned when running on gentoo-dev-sources-2.6.7 Sample websites: http://www.play.com http://www.ntl-isp.ntl.com/ServiceStatus/ I have googled some docs relating this to IPV6 DNS queries, but have tried the suggested "KDE_NO_IPV6=true" setting in /etc/env.d/99kde-env to no avail. Ongoing tests and user comments are in the discussion forums at... http://forums.gentoo.org/viewtopic.php?t=214355 Reproducible: Always Steps to Reproduce: 1.Boot under 2.6.8 kernel 2.Load webpage that demonstrates fault 3. Actual Results: Page takes several minutes to load. Expected Results: Under 2.6.7 page loads in 1 second. Gentoo Base System version 1.4.16 Portage 2.0.50-r10 (default-x86-2004.2, gcc-3.3.3, glibc-2.3.3.20040420-r1, 2.6.8-gentoo-r3) ================================================================= System uname: 2.6.8-gentoo-r3 i686 Intel(R) Pentium(R) 4 CPU 2.40GHz ccache version 2.3 [enabled] Autoconf: sys-devel/autoconf-2.59-r4 Automake: sys-devel/automake-1.8.5-r1 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CFLAGS="-march=pentium4 -O3 -pipe -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" COMPILER="" CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3.2/share/config /usr/kde/3/share/config /usr/lib/mozilla/defaults/pref /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-march=pentium4 -O3 -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs ccache sandbox" GENTOO_MIRRORS="http://gentoo.blueyonder.co.uk ftp://gentoo.blueyonder.co.uk/mirrors/gentoo http://www.mirror.ac.uk/sites/www.ibiblio.org/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="X acpi alsa apache2 arts artswrappersuid avi berkdb cdr crypt cups dga directfb dvd emacs encode esd fbcon foomaticdb gd gdbm gif gimp gimpprint gnome gpm gtk gtk2 imlib java jpeg kde libg++ libwww linguas_en_GB mad mbox mikmod mmx motif mozilla mpeg mysql ncurses nls oggvorbis opengl oss pam pcmcia pdflib perl png ppds python qt quicktime readline scanner sdl slang spell sse ssl svga tcltk tcpd tetex tiff truetype usb video_cards_radeon wmf x86 xml2 xmms xv zlib"
Appears to be related to change in tcp_window_scaling behaviour between 2.6.7 and 2.6.8 Setting /proc/net/ipv4/tcp_window_scaling to 0 resolves the issue.
Setting tcp_window_scaling to "0" does NOT fix the problem for me. I am running KDE 3.3.0 with 2.6.7-r13 at the moment. This problem first appeared last night, and I was running 2.6.7-r11 then. I hoped an update to 2.6.7-r13 would help, but I was wrong. I am reluctant to update to 2.6.8 at the moment for other reasons. Checking mail or web browsing takes 30-60 seconds to complete (for each page) when they used to be instantaneous. Mozilla Firefox exhibits the same problem. Portage 2.0.50-r10 (default-x86-2004.0, gcc-3.3.4, glibc-2.3.4.20040808-r0, 2.6.7-gentoo-r13) ================================================================= System uname: 2.6.7-gentoo-r13 i686 Intel(R) Pentium(R) 4 CPU 3.00GHz Gentoo Base System version 1.5.3 distcc 2.14 i686-pc-linux-gnu (protocols 1 and 2) (default port 3632) [enabled] ccache version 2.3 [enabled] Autoconf: sys-devel/autoconf-2.59-r4 Automake: sys-devel/automake-1.8.5-r1 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CFLAGS="-march=pentium4 -mcpu=pentium4 -O3 -pipe -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" COMPILER="" CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3.2/share/config /usr/kde/3.3/share/config:/usr/kde/3.3/env:/usr/kde/3.3/shutdown /usr/kde/3/share/config /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-march=pentium4 -mcpu=pentium4 -O3 -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs ccache distcc sandbox" GENTOO_MIRRORS="http://gentoo.mirrors.pair.com/ ftp://mirrors.tds.net/gentoo http://mirror.datapipe.net/gentoo" MAKEOPTS="-j5" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X aac acpi alsa apache2 arts audiofile avi berkdb cdr crypt cups divx4linux dvd dvdr encode f77 flac foomaticdb gdbm gif gpm imagemagick imap imlib innodb jpeg kde libg++ libwww live mad maildir mikmod mmx mpeg mysql ncurses nls nptl oggvorbis opengl pam pdflib perl png python qt quicktime readline samba scanner sdl speex sse ssl tcpd theora tiff truetypeunicode usb vhosts x86 xml2 xvid zlib"
Also FWIW, I can browse sites in lynx without problems (the 30-60 second delay) that I see in Konqueror or Mozilla.
Mozilla Firefox is fine. I spoke too soon. For more details on my troubleshooting session last night, read this thread: http://forums.gentoo.org/viewtopic.php?p=1486922#1486070
According to http://lwn.net/Articles/92727/, the bug isn't in the kernel, it's down to broken routers on the internet. Setting the default window scale factor is the recommended solution for the time being. Thanks to Gustavo Barron for pointing out the above article.
