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On Thu, Feb 16, 2012 at 04:29:48PM +0100, Alex Schuster wrote |
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> Then my hardware broke, and I got new one... |
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I had ***EXACTLY THE SAME PROBLEM ON A FRESH INSTALL***. In My case |
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it was a 4+ year old Dell with onboard Intel GPU that was having |
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problems playing NHL Gamecenter Live streams at the slowest speed. I |
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solved the problem and sped up everything by doing... |
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1) emerge system |
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2) emerge world |
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3) rebuild the kernel and reboot |
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A fresh install will have the stage 3 binaries built with |
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lowest-common-denominator x86 or amd64 code (depending if you chose 32 |
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or 64 bit install). This is necessary in order to allow the install |
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code to run on all CPUs with the target platform. The downside is that |
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you lose all the optimisations that make Gentoo scream. Rebuilding the |
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install as described above builds optimized (i.e. faster) binaries. My |
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CFLAGS line in /etc/make.conf is... |
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CFLAGS="-O2 -march=native -mfpmath=sse -fomit-frame-pointer -pipe" |
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CXXFLAGS="${CFLAGS}" |
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Before rebuilding your system, go over your USE flags to make sure |
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you've got the maximum optimization. To find out what your CPU |
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supports, execute the command |
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grep flags /proc/cpuinfo | head -1 |
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This will define the limits what your system can support. For |
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instance, mplayer can use the following flags... |
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waltdnes@d530 ~ $ emerge -pv mplayer |
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These are the packages that would be merged, in order: |
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Calculating dependencies... done! |
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[ebuild R ] media-video/mplayer-1.0_rc4_p20110322-r1 USE="X a52 alsa ass dga encode gif jpeg mmx mmxext mng mp3 opengl png quicktime real rtmp sse sse2 ssse3 theora truetype win32codecs x264 xv xvid xvmc -3dnow -3dnowext -aalib (-altivec) -amr (-aqua) -bidi -bindist -bl -bluray -bs2b -cddb -cdio -cdparanoia -cpudetection -custom-cpuopts -debug -dirac -directfb -doc -dts -dv -dvb -dvd -dvdnav (-dxr3) -enca (-esd) -faac -faad -fbcon -ftp -ggi -gsm -iconv -ipv6 -jack -joystick -jpeg2k -ladspa -libcaca -libmpeg2 -lirc -live -lzo -mad -md5sum -mpg123 -nas -network -nut -openal -osdmenu -oss -pnm -pulseaudio -pvr -radio -rar -rtc -samba -schroedinger -sdl -shm -speex -tga -toolame -tremor -twolame -unicode -v4l -vdpau -vidix -vorbis -vpx -xanim -xinerama -xscreensaver -zoran" VIDEO_CARDS="-mga -s3virge -tdfx -vesa" 0 kB |
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Your CPU will obviously support a different set of USE flags than |
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mine. Check the files /usr/portage/profiles/use.desc for a list of |
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global flags and /usr/portage/profiles/use.local.desc for |
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package-specific flags. |
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-- |
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Walter Dnes <waltdnes@××××××××.org> |
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