2020/03/23 Updated: new images have been uploaded to fix an emergency audio issue of Surface 3. If you are not a user of Surface 3, you do not need to re-download the images.
The 8.1-r4 is mainly a security updates of 8.1-r3. We encourage users of 8.1-r3 or older releases upgrade to this one.
This release contains these files. You can choose one of them depends on your devices. Most modern devices should be able to run the 64-bit ISO. For older devices with legacy BIOS, you may try the 32-bit ISO.
Recommended for VMware users
To use an ISO file, Linux users can dump it into a usb drive by dd command like:
dd if=android-x86_64-8.1-r4.iso of=/dev/sdX
where /dev/sdX is the device name of your usb drive.
Windows's users can use the tool Win32 Disk Imager to create a bootable usb stick.
Please read this page about how to install it to the device.
Except the traditional ISO files, we also package android-x86 files into a Linux package rpm. It allows Linux users to easily install the release into an existing Linux device with a standalone ext4 root partition. On an rpm based device (Fedora/Red Hat/CentOS/SUSE...), just install it like a normal rpm package:
sudo rpm -Uvh android-x86-8.1-r4.x86_64.rpm
This will update your older installation like 7.1-r3 or 8.1-r3 if you have.
On a deb based device (Debian/Ubuntu/LinuxMint/...), please use the alien tool to install it:
sudo apt install alien
sudo alien -ci android-x86-8.1-r4.x86_64.rpm
All files will be installed to the /android-8.1-r4/ subdirectory and boot entries will be added to grub2 menu. Reboot and choose android-x86 item from the menu to boot Android-x86. Alternatively, you can launch Android-x86 in a QEMU virtual machine by the installed qemu-android script:
Note Android-x86 running in QEMU and the real machine (after rebooting) share the same data sub-folder.To uninstall it :
sudo rpm -e android-x86
sudo apt-get remove android-x86
repo init -u git://git.osdn.net/gitroot/android-x86/manifest -b oreo-x86 -m android-x86-8.1-r4.xml
repo sync --no-tags --no-clone-bundle
Read this page for how to compile source code.
To build 8.1-r4 with kernel 4.9, sync the source tree as above commands, then
git fetch x86 kernel-4.9
git checkout -t x86/kernel-4.9