OS images for emulation: Difference between revisions
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#REDIRECT [[Emulating the XO]] |
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Basic emulation options are listed here. For Windows emulation, see '''[[Using QEMU on Windows XP]]'''. |
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You can find the '''[[OS_images#Latest_Stable_Build |latest stable build here.]]''' |
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== OLPC OS performance under emulation == |
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It should be noted that running the OLPC images under qemu and related emulators are '''significantly less responsive'''. A side by side of OLPC OS under qemu and other OS (such as Linux or Windows), will present Sugar as very unresponsive. However, Sugar responds far better on the A-Test development board. See [[User Feedback on Images]]. |
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If performance is so poor activities fail to load see [[#Coping with Slow|Coping with Slow]] for a possible work-around. |
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== ''OLPC Simulator'' GRUB boot option == |
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When booting an [[OS images|OS image]] within an emulator, you need to make sure you boot the kernel with the correct options. When booting, you'll see the green screen of GRUB with ''One Laptop Per Child'' along the bottom: in this boot menu, make sure you select ''OLPC Simulator''. Otherwise, bootup on real OLPC hardware will be assumed, and since the emulator does not emulate the OLPC hardware exactly, bootup will fail. |
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== QEMU == |
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The easiest way to test the images is to use qemu or some similar emulator. It is available for various host systems: |
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* [[#QEMU on Linux|Linux]] |
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* [[#QEMU on FreeBSD|FreeBSD]] |
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* [[#QEMU on Windows|Windows]] |
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* [[#QEMU on Mac OS X|Mac OS X]] |
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=== QEMU on Linux === |
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On Fedora Core 5, QEMU is included in extras and is very easy to install. As root just type |
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yum install qemu |
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and it should be installed. You may have to start the service for it. As root run: |
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service qemu start |
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On Debian/Ubuntu, QEMU is included in the repository. |
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apt-get install qemu |
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Once you have an image downloaded, it is very easy to use qemu to launch the OLPC environment: |
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qemu -soundhw es1370 -serial `tty` -hda \ |
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olpc-stream-development-7-20060609_1600-ext3.img |
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If qemu complains about insufficient space in /dev/shm then |
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mount -t tmpfs -o remount,size=144m none /dev/shm |
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If you want to use kqemu to speed up the emulation then |
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modprobe kqemu major=0 |
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and add the <tt>-kernel-kqemu</tt> option. |
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We have heard multiple people say that QEMU doesn't work with these images on the debian-derived distributions. The symptom is that the kernel hangs during boot. There's a problem with <code>bochsbios</code> version 2.2, version 2.3 works. As a quick fix, <code>apm=off</code> can be added to OLPC kernel arguments. (For more info, see the [[Talk:OS images for emulation#Boot hangs on Debian-derived distros|discussion]].) |
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If you have network problems through Qemu and OLPC, [[Using_QEMU_on_Troubleshooting#Network|try this.]] |
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=== QEMU Development Strategies === |
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For those who would like to use QEMU for developing Python software (Sugar software) for the OLPC, it's convenient to set up a connection between the host and the Laptop image. Under QEMU the Laptop image can see the host as IP address 10.0.2.2 . If you create an SSH server on your host and install a key on your Laptop image that has logon rights for that server. |
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ok it working |
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=== QEMU on FreeBSD === |
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Install qemu from ports: |
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cd /usr/ports/emulators/qemu |
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Latest revision as of 20:52, 26 May 2007
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