| 1 |
<?xml version="1.0" encoding="UTF-8"?>
|
| 2 |
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
|
| 3 |
<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/gentoo-amd64-faq.xml,v 1.25 2007/07/22 07:32:28 nightmorph Exp $ -->
|
| 4 |
|
| 5 |
<guide link="/doc/en/gentoo-amd64-faq.xml">
|
| 6 |
<title>Gentoo Linux/AMD64 Frequently Asked Questions</title>
|
| 7 |
|
| 8 |
<author title="Editor">
|
| 9 |
<mail link="blubb@gentoo.org">Simon Stelling</mail>
|
| 10 |
</author>
|
| 11 |
<author title="Editor">
|
| 12 |
<mail link="metalgod@gentoo.org">Luis Medinas</mail>
|
| 13 |
</author>
|
| 14 |
<author title="Editor">
|
| 15 |
<mail link="gerrynjr@gentoo.org">Gerald J. Normandin Jr.</mail>
|
| 16 |
</author>
|
| 17 |
<author title="Editor">
|
| 18 |
<mail link="neysx@gentoo.org">Xavier Neys</mail>
|
| 19 |
</author>
|
| 20 |
|
| 21 |
<abstract>
|
| 22 |
This is the Gentoo Linux/AMD64 Frequently Asked Questions
|
| 23 |
</abstract>
|
| 24 |
|
| 25 |
<!-- The content of this document is licensed under the CC-BY-SA license -->
|
| 26 |
<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
|
| 27 |
<license/>
|
| 28 |
|
| 29 |
<version>1.18</version>
|
| 30 |
<date>2007-07-22</date>
|
| 31 |
|
| 32 |
<faqindex>
|
| 33 |
<title>Questions</title>
|
| 34 |
<section>
|
| 35 |
<title>Introduction to Gentoo/AMD64 FAQ</title>
|
| 36 |
<body>
|
| 37 |
|
| 38 |
<p>
|
| 39 |
This document contains the most commonly asked questions about Gentoo/AMD64. We
|
| 40 |
intend to help and provide useful information about Gentoo/AMD64. Some of these
|
| 41 |
questions can be found in forums, IRC, or mailing lists. If you have
|
| 42 |
suggestions or questions about this FAQ, you are welcome to send an e-mail to
|
| 43 |
<mail>amd64@gentoo.org</mail>.
|
| 44 |
</p>
|
| 45 |
|
| 46 |
</body>
|
| 47 |
</section>
|
| 48 |
</faqindex>
|
| 49 |
|
| 50 |
<chapter>
|
| 51 |
<title>Installation</title>
|
| 52 |
<section id="cflags">
|
| 53 |
<title>What CFLAGS should I use for AMD64/EM64T?</title>
|
| 54 |
<body>
|
| 55 |
|
| 56 |
<p>
|
| 57 |
You should use simple <c>CFLAGS</c> to avoid future problems with your system.
|
| 58 |
Supported <c>CFLAGS</c> are <c>-O2 -march=k8 -pipe</c> for non-EM64T systems and
|
| 59 |
<c>-O2 -march=nocona -pipe</c> for EM64T systems.
|
| 60 |
</p>
|
| 61 |
|
| 62 |
</body>
|
| 63 |
</section>
|
| 64 |
<section id="kernel">
|
| 65 |
<title>What kernel should I use for AMD64?</title>
|
| 66 |
<body>
|
| 67 |
|
| 68 |
<p>
|
| 69 |
You can use almost all kernel sources available in Portage. We recommend using
|
| 70 |
<c>gentoo-sources</c> because it is a special kernel designed for Gentoo Linux.
|
| 71 |
It contains lots of AMD64-specific patches and therefore is the only kernel
|
| 72 |
officially supported by Gentoo/AMD64.
|
| 73 |
</p>
|
| 74 |
|
| 75 |
<warn>
|
| 76 |
You should watch out for some kernel features which are not well tested, such
|
| 77 |
as <c>PREEMPT</c>.
|
| 78 |
</warn>
|
| 79 |
|
| 80 |
<p>
|
| 81 |
Make sure you have the <c>IA32_EMULATION</c> option activated in the kernel.
|
| 82 |
</p>
|
| 83 |
|
| 84 |
<pre caption="Activating IA32 Emulation in Kernel source">
|
| 85 |
# <i>cd /usr/src/linux</i>
|
| 86 |
# <i>make menuconfig</i>
|
| 87 |
|
| 88 |
Executable file formats / Emulations --->
|
| 89 |
[*] IA32 Emulation
|
| 90 |
</pre>
|
| 91 |
|
| 92 |
<warn>
|
| 93 |
You may experience build failures on multilib-systems if you deactivate this
|
| 94 |
option.
|
| 95 |
</warn>
|
| 96 |
|
| 97 |
</body>
|
| 98 |
</section>
|
| 99 |
<section id="perfup">
|
| 100 |
<title>Will I have a performance upgrade if I use a 64bit system instead of 32bit?</title>
|
| 101 |
<body>
|
| 102 |
|
| 103 |
<p>
|
| 104 |
That is a difficult question to answer. In some cases, you will experience a
|
| 105 |
performance improvement, in other cases you will not. For everyday use, there
|
| 106 |
is nearly no difference between 64bit and 32bit. 64bit is generally faster
|
| 107 |
when it comes to floating point computing which is normally the case in
|
| 108 |
multimedia applications and 3D rendering. This <uri
|
| 109 |
link="http://enterprise.linux.com/enterprise/05/06/09/1413209.shtml?tid=121">article</uri>
|
| 110 |
may interest you. There's also a nice <uri
|
| 111 |
link="http://forums.gentoo.org/viewtopic-t-349691.html">thread</uri> in our
|
| 112 |
<uri link="http://forums.gentoo.org">forums</uri>.
|
| 113 |
</p>
|
| 114 |
|
| 115 |
</body>
|
| 116 |
</section>
|
| 117 |
<section id="multilib">
|
| 118 |
<title>What is multilib and how can I use it?</title>
|
| 119 |
<body>
|
| 120 |
|
| 121 |
<p>
|
| 122 |
Every AMD64 processor is able to run 32bit code as well as 64bit code.
|
| 123 |
However, when you have a 32bit application, you are unable to mix it with
|
| 124 |
64bit libraries or vice versa. You can, however, natively run 32bit
|
| 125 |
applications if all shared libraries it needs are available as 32bit objects.
|
| 126 |
You can choose whether you want multilib support or not by selecting the
|
| 127 |
according profile. The default is a multilib-enabled profile.
|
| 128 |
</p>
|
| 129 |
|
| 130 |
<warn>
|
| 131 |
Currently you cannot switch from a no-multilib to a multilib-enabled profile,
|
| 132 |
so think over your decision twice before you use the no-multilib profile.
|
| 133 |
</warn>
|
| 134 |
|
| 135 |
</body>
|
| 136 |
</section>
|
| 137 |
<section id="chroot32">
|
| 138 |
<title>How do I create a 32bit chroot?</title>
|
| 139 |
<body>
|
| 140 |
|
| 141 |
<p>
|
| 142 |
Please read the <uri link="/proj/en/base/amd64/howtos/chroot.xml">32bit chroot
|
| 143 |
guide</uri>.
|
| 144 |
</p>
|
| 145 |
|
| 146 |
</body>
|
| 147 |
</section>
|
| 148 |
<section id="upgradex86">
|
| 149 |
<title>Can I upgrade from my x86 system to amd64 by doing emerge -e world?</title>
|
| 150 |
<body>
|
| 151 |
|
| 152 |
<p>
|
| 153 |
Due to several differences between an <c>x86</c> and an <c>amd64</c>
|
| 154 |
installation, it is impossible to upgrade. Please perform a fresh install. The
|
| 155 |
installation is slightly different than an x86 one, so please use the
|
| 156 |
<uri link="/doc/en/handbook/handbook-amd64.xml">AMD64 Handbook</uri>.
|
| 157 |
</p>
|
| 158 |
|
| 159 |
</body>
|
| 160 |
</section>
|
| 161 |
<section id="reiser4">
|
| 162 |
<title>Can I use Reiser4?</title>
|
| 163 |
<body>
|
| 164 |
|
| 165 |
<p>
|
| 166 |
Reiser4 is not available from any kernel offered by the Gentoo Kernel project,
|
| 167 |
thus neither AMD64 team supports it. The answer is no.
|
| 168 |
</p>
|
| 169 |
|
| 170 |
</body>
|
| 171 |
</section>
|
| 172 |
</chapter>
|
| 173 |
|
| 174 |
<chapter>
|
| 175 |
<title>Hardware</title>
|
| 176 |
<section id="videobindrivers">
|
| 177 |
<title>Will my binary NVIDIA/ATI drivers work?</title>
|
| 178 |
<body>
|
| 179 |
|
| 180 |
<p>
|
| 181 |
Yes, NVIDIA and ATI provide drivers that work on AMD64. You can install them by
|
| 182 |
executing <c>emerge nvidia-drivers</c> or <c>emerge ati-drivers</c>. If you have
|
| 183 |
more questions about these drivers, you should read the <uri
|
| 184 |
link="/doc/en/nvidia-guide.xml">Nvidia guide</uri> or the <uri
|
| 185 |
link="/doc/en/ati-faq.xml">ATI FAQ</uri>.
|
| 186 |
</p>
|
| 187 |
|
| 188 |
</body>
|
| 189 |
</section>
|
| 190 |
<section id="coolnquiet">
|
| 191 |
<title>How do I use Cool'n'Quiet/PowerNow features?</title>
|
| 192 |
<body>
|
| 193 |
|
| 194 |
<p>
|
| 195 |
You have to compile your kernel with support for these features. You just need
|
| 196 |
to enable the features below:
|
| 197 |
</p>
|
| 198 |
|
| 199 |
<pre caption="Kernel options for Cool'n'Quiet/PowerNow">
|
| 200 |
Power management options --->
|
| 201 |
[*] Power Management support
|
| 202 |
CPU Frequency scaling --->
|
| 203 |
[*] CPU Frequency scaling
|
| 204 |
[*] CPU frequency table helpers
|
| 205 |
[*] AMD Opteron/Athlon64 PowerNow!
|
| 206 |
</pre>
|
| 207 |
|
| 208 |
<p>
|
| 209 |
Then <c>emerge cpudyn</c> and edit <path>/etc/conf.d/cpudyn</path> with your
|
| 210 |
favorite editor.
|
| 211 |
</p>
|
| 212 |
|
| 213 |
<pre caption="Example of /etc/conf.d/cpudyn">
|
| 214 |
INTERVAL=1
|
| 215 |
CPU_UP=0.5
|
| 216 |
CPU_DOWN=0.9
|
| 217 |
THROTTLING_LOW=7
|
| 218 |
CPUFREQ_25="/sys/devices/system/cpu/cpu0/cpufreq /sysfs/devices/system/cpu/cpu0/cpufreq"
|
| 219 |
CPUFREQ_ACPI="/proc/acpi/processor/CPU0/throttling"
|
| 220 |
</pre>
|
| 221 |
|
| 222 |
<p>
|
| 223 |
Now you only have to run <c>rc-update add cpudyn default</c> to make sure it is
|
| 224 |
started every time you boot.
|
| 225 |
</p>
|
| 226 |
|
| 227 |
<note>
|
| 228 |
You may want to read the <uri
|
| 229 |
link="/doc/en/power-management-guide.xml#doc_chap3">Power Management Guide</uri>
|
| 230 |
for more tips on CPU power management.
|
| 231 |
</note>
|
| 232 |
|
| 233 |
</body>
|
| 234 |
</section>
|
| 235 |
</chapter>
|
| 236 |
|
| 237 |
<chapter>
|
| 238 |
<title>Applications</title>
|
| 239 |
<section id="flash">
|
| 240 |
<title>Can I get Macromedia Flash working?</title>
|
| 241 |
<body>
|
| 242 |
|
| 243 |
<p>
|
| 244 |
Yes. To get Flash working, you need a 32bit browser like
|
| 245 |
<c>mozilla-firefox-bin</c> or <c>opera</c> because Macromedia doesn't provide a
|
| 246 |
64bit version. After emerging the -bin package of your favorite browser,
|
| 247 |
install Flash by doing <c>emerge netscape-flash</c>.
|
| 248 |
</p>
|
| 249 |
|
| 250 |
</body>
|
| 251 |
</section>
|
| 252 |
<section id="OOo">
|
| 253 |
<title>Can I get OpenOffice.org working?</title>
|
| 254 |
<body>
|
| 255 |
|
| 256 |
<p>
|
| 257 |
OpenOffice versions prior to 2.0.4 do not build on 64bit systems, so you have to use the
|
| 258 |
32bit binary version, available in Portage as <c>app-office/openoffice-bin</c>.
|
| 259 |
If you feel brave you can <c>emerge openoffice</c>, but be aware that the 64bit version
|
| 260 |
is not yet tested out enough to be considered stable.
|
| 261 |
</p>
|
| 262 |
|
| 263 |
</body>
|
| 264 |
</section>
|
| 265 |
<section id="masked">
|
| 266 |
<title>I want to install package foo, but emerge says: (masked by: ~amd64 keyword)</title>
|
| 267 |
<body>
|
| 268 |
|
| 269 |
<p>
|
| 270 |
This means that the package is still in the 'testing' tree. Please read <c>man
|
| 271 |
portage</c> or the <uri
|
| 272 |
link="/doc/en/handbook/handbook-amd64.xml?part=3&chap=3">Mixing Software
|
| 273 |
Branches</uri> chapter of the <uri
|
| 274 |
link="/doc/en/handbook/handbook-amd64.xml">AMD64 Handbook</uri> for more
|
| 275 |
information.
|
| 276 |
</p>
|
| 277 |
|
| 278 |
</body>
|
| 279 |
</section>
|
| 280 |
<section id="keyword">
|
| 281 |
<title>I want to install package foo, but emerge says: (masked by: missing keyword)</title>
|
| 282 |
<body>
|
| 283 |
|
| 284 |
<p>
|
| 285 |
This means that the package has not been tested yet. It does <e>not
|
| 286 |
necessarily</e> mean that the package does not work. You can unmask it by
|
| 287 |
accepting another architecture for the package. The following example shows you
|
| 288 |
can tell Portage to accept any keyword for a given package.
|
| 289 |
</p>
|
| 290 |
|
| 291 |
<pre caption="Example of adding package keywords">
|
| 292 |
# <i>echo "category/packagename ~* *" >> /etc/portage/package.keywords</i>
|
| 293 |
# <i>emerge packagename</i>
|
| 294 |
</pre>
|
| 295 |
|
| 296 |
<p>
|
| 297 |
If it works fine for you, please let us know and file a bug on <uri
|
| 298 |
link="http://bugs.gentoo.org/">Gentoo's Bugzilla</uri>, so that the AMD64 team
|
| 299 |
can keyword the package and other users can benefit from your test.
|
| 300 |
</p>
|
| 301 |
|
| 302 |
<warn>
|
| 303 |
Do not try commands like <c>ACCEPT_KEYWORDS="~x86" emerge packagename</c>. It
|
| 304 |
will most certainly break your tree.
|
| 305 |
</warn>
|
| 306 |
|
| 307 |
</body>
|
| 308 |
</section>
|
| 309 |
</chapter>
|
| 310 |
|
| 311 |
<chapter>
|
| 312 |
<title>How can I help the Gentoo/AMD64 project?</title>
|
| 313 |
<section id="project">
|
| 314 |
<title>How can I help?</title>
|
| 315 |
<body>
|
| 316 |
|
| 317 |
<p>
|
| 318 |
With a growing popularity of the amd64 architecture, we also increasingly need
|
| 319 |
more help. There's still much work to be done to improve the quality of
|
| 320 |
Gentoo/AMD64. An average user can help us by:
|
| 321 |
</p>
|
| 322 |
|
| 323 |
<ul>
|
| 324 |
<li>Filing general bug reports</li>
|
| 325 |
<li>Testing software that does not yet have the <c>~amd64</c> keyword</li>
|
| 326 |
<li>
|
| 327 |
Participating in the <uri link="/proj/en/base/amd64/at/">Arch Testers
|
| 328 |
project</uri>
|
| 329 |
</li>
|
| 330 |
<li>
|
| 331 |
Help answering questions on the mailing lists, forums and IRC channels
|
| 332 |
</li>
|
| 333 |
<li>Sending patches</li>
|
| 334 |
</ul>
|
| 335 |
|
| 336 |
</body>
|
| 337 |
</section>
|
| 338 |
</chapter>
|
| 339 |
|
| 340 |
<chapter>
|
| 341 |
<title>Other Resources</title>
|
| 342 |
<section id="other">
|
| 343 |
<title>Where can I get more help or information about Gentoo/AMD64?</title>
|
| 344 |
<body>
|
| 345 |
|
| 346 |
<p>
|
| 347 |
If any of your questions wasn't answered here, you can try other resources
|
| 348 |
listed on <uri link="/proj/en/base/amd64/">our project homepage</uri>. You can
|
| 349 |
also ask us at <c>#gentoo-amd64</c> on <c>irc.freenode.net</c>, <uri
|
| 350 |
link="http://forums.gentoo.org/viewforum-f-46.html">Gentoo/AMD64 Forums</uri>,
|
| 351 |
or on the <c>gentoo-amd64@lists.gentoo.org</c> mailing list.
|
| 352 |
</p>
|
| 353 |
|
| 354 |
</body>
|
| 355 |
</section>
|
| 356 |
</chapter>
|
| 357 |
|
| 358 |
</guide>
|
Parent Directory
| 
Revision Log