&debian; does not impose hardware requirements beyond the requirements of the Linux or kFreeBSD kernel and the GNU tool-sets. Therefore, any architecture or platform to which the Linux or kFreeBSD kernel, libc, gcc, etc. have been ported, and for which a &debian; port exists, can run &debian;. Please refer to the Ports pages at for more details on &arch-title; architecture systems which have been tested with &debian-gnu;. Rather than attempting to describe all the different hardware configurations which are supported for &arch-title;, this section contains general information and pointers to where additional information can be found. &debian; GNU/Linux &release; supports eight major architectures and several variations of each architecture known as flavors. Architecture&debian; Designation SubarchitectureFlavor Intel x86-based i386 AMD64 & Intel 64 amd64 ARM armel Marvell Kirkwood kirkwood Marvell Orion orion5x Marvell MV78xx0 mv78xx0 Versatile versatile ARM with hardware FPU armhf multiplatform armmp multiplatform for LPAE-capable systems armmp-lpae MIPS (big endian) mips SGI IP22 (Indy/Indigo 2) r4k-ip22 SGI IP32 (O2) r5k-ip32 MIPS Malta (32 bit) 4kc-malta MIPS Malta (64 bit) 5kc-malta MIPS (little endian) mipsel MIPS Malta (32 bit) 4kc-malta MIPS Malta (64 bit) 5kc-malta IBM/Motorola PowerPC powerpc PowerMac pmac PReP prep 64bit IBM S/390 s390x IPL from VM-reader and DASD generic &debian; GNU/kFreeBSD &release; supports two architectures. Architecture&debian; Designation Intel x86-based kfreebsd-i386 AMD64 & Intel 64 kfreebsd-amd64 This document covers installation for the &arch-title; architecture using the &arch-kernel; kernel. If you are looking for information on any of the other &debian;-supported architectures take a look at the &debian;-Ports pages. The &arch-title; architecture only supports Intel Itanium processors and not the much more common 64-bit processors from the Intel 64 family (including e.g. the Pentium D and the Core2 Duo). Those systems are supported by the amd64 architecture or, if you prefer a 32-bit userland, the i386 architecture. This is the first official release of &debian-gnu; for the &arch-title; architecture. We feel that it has proven itself sufficiently to be released. However, because it has not had the exposure (and hence testing by users) that some other architectures have had, you may encounter a few bugs. Use our Bug Tracking System to report any problems; make sure to mention the fact that the bug is on the &arch-title; platform using the &arch-kernel; kernel. It can be necessary to use the debian-&arch-listname; mailing list as well. &supported-amd64.xml; &supported-arm.xml; &supported-hppa.xml; &supported-i386.xml; &supported-ia64.xml; &supported-mips.xml; &supported-mipsel.xml; &supported-powerpc.xml; &supported-s390.xml; &supported-sparc.xml; From a technical point of view, laptops are normal PCs, so all information regarding PC systems applies to laptops as well. Installations on laptops nowadays usually work out of the box, including things like automatically suspending the system on closing the lid and laptop specfic hardware buttons like those for disabling the wifi interfaces (airplane mode). Nonetheless sometimes the hardware vendors use specialized or proprietary hardware for some laptop-specific functions which might not be supported. To see if your particular laptop works well with GNU/Linux, see for example the Linux Laptop pages. Multiprocessor support — also called symmetric multiprocessing or SMP — is available for this architecture. Having multiple processors in a computer was originally only an issue for high-end server systems but has become common in recent years nearly everywhere with the introduction of so called multi-core processors. These contain two or more processor units, called cores, in one physical chip. The standard &debian; &release; kernel image has been compiled with SMP support. It is also usable on non-SMP systems without problems. Multiprocessor support — also called symmetric multiprocessing or SMP — is available for this architecture. The standard &debian; &release; kernel image has been compiled with SMP-alternatives support. This means that the kernel will detect the number of processors (or processor cores) and will automatically deactivate SMP on uniprocessor systems. Having multiple processors in a computer was originally only an issue for high-end server systems but has become common in recent years nearly everywhere with the introduction of so called multi-core processors. These contain two or more processor units, called cores, in one physical chip. The 486 flavour of the &debian; kernel image packages for &arch-title; is not compiled with SMP support. Multiprocessor support — also called symmetric multiprocessing or SMP — is available for this architecture. However, the standard &debian; &release; kernel image does not support SMP. This should not prevent installation, since the standard, non-SMP kernel should boot on SMP systems; the kernel will simply use only the first CPU. In order to take advantage of multiple processors, you'll have to replace the standard &debian; kernel. You can find a discussion of how to do this in . At this time (kernel version &kernelversion;) the way you enable SMP is to select &smp-config-option; in the &smp-config-section; section of the kernel config. Multiprocessor support — also called symmetric multiprocessing or SMP — is available for this architecture, and is supported by a precompiled &debian; kernel image. Depending on your install media, this SMP-capable kernel may or may not be installed by default. This should not prevent installation, since the standard, non-SMP kernel should boot on SMP systems; the kernel will simply use the first CPU. In order to take advantage of multiple processors, you should check to see if a kernel package that supports SMP is installed, and if not, choose an appropriate kernel package. You can also build your own customized kernel to support SMP. You can find a discussion of how to do this in . At this time (kernel version &kernelversion;) the way you enable SMP is to select &smp-config-option; in the &smp-config-section; section of the kernel config. &debian;'s support for graphical interfaces is determined by the underlying support found in X.Org's X11 system. On modern PCs, having a graphical display usually works out of the box. Whether advanced graphics card features such as 3D-hardware acceleration or hardware-accelerated video are available, depends on the actual graphics hardware used in the system and in some cases on the installation of additional firmware images (see ). In very few cases there have been reports about hardware on which installation of additional graphics card firmware was required even for basic graphics support, but these have been rare exceptions. Details on supported graphics cards and pointing devices can be found at . &debian; &release; ships with X.Org version &x11ver;. The X.Org X Window System is only supported on the SGI Indy and the O2. Most graphics options commonly found on Sparc-based machines are supported. X.org graphics drivers are available for sunbw2, suncg14, suncg3, suncg6, sunleo and suntcx framebuffers, Creator3D and Elite3D cards (sunffb driver), PGX24/PGX64 ATI-based video cards (ati driver), and PermediaII-based cards (glint driver). To use an Elite3D card with X.org you additionally need to install the afbinit package, and read the documentation included with it on how to activate the card. It is not uncommon for a Sparc machine to have two graphics cards in a default configuration. In such a case there is a possibility that the Linux kernel will not direct its output to the card initially used by the firmware. The lack of output on the graphical console may then be mistaken for a hang (usually the last message seen on console is 'Booting Linux...'). One possible solution is to physically remove one of the video cards; another option is to disable one of the cards using a kernel boot parameter. Also, if graphical output is not required or desired, serial console may be used as an alternative. On some systems use of serial console can be activated automatically by disconnecting the keyboard before booting the system. &network-cards.xml; &accessibility-hardware.xml; &supported-peripherals.xml; Besides the availability of a device driver, some hardware also requires so-called firmware or microcode to be loaded into the device before it can become operational. This is most common for network interface cards (especially wireless NICs), but for example some USB devices and even some hard disk controllers also require firmware. With many graphics cards, basic functionality is available without additional firmware, but the use of advanced features requires an appropriate firmware file to be installed in the system. On many older devices which require firmware to work, the firmware file was permanently placed in an EEPROM/Flash chip on the device itself by the manufacturer. Nowadays most new devices do not have the firmware embedded this way anymore, so the firmware file must be uploaded into the device by the host operating system every time the system boots. In most cases firmware is non-free according to the criteria used by the &debian-gnu; project and thus cannot be included in the main distribution or in the installation system. If the device driver itself is included in the distribution and if &debian-gnu; legally can distribute the firmware, it will often be available as a separate package from the non-free section of the archive. However, this does not mean that such hardware cannot be used during an installation. Starting with &debian-gnu; 5.0, &d-i; supports loading firmware files or packages containing firmware from a removable medium, such as a USB stick. See for detailed information on how to load firmware files or packages during the installation. If the &d-i; prompts for a firmware file and you do not have this firmware file available or do not want to install a non-free firmware file on your system, you can try to proceed without loading the firmware. There are several cases where a driver prompts for additional firmware because it may be needed under certain circumstances, but the device does work without it on most systems (this e.g. happens with certain network cards using the tg3 driver).