Re: QEMU, Windows 11, and Raspios
Hi list, On 2024-10-19 14:09, G.W. Haywood wrote: Hi there, On Fri, 18 Oct 2024, Ignacio wrote: I am currently using a laptop that is running Windows 11 and I have downloaded QEMU. However, I cannot figure out how to use QEMU to emulate Raspios. Raspios does not use a .iso, but instead a .img. I was wondering if there is a way around this or if I am complicating this process. There surely is a way. The two data formats you mention are different because they are used for different purposes. [Snipped Long ranty description of everything but how to use the files with qemu ] The rant got a lot of details wrong, so don't use it. Here's the short version as I understand it: For the .img file (if it is truly a bootable SD card image): 1. Create a Qemu copy-on-write (version 2) virtual SD card image which uses the .img file as the base butkeeps all changes written by the virtual RPi in the qcow2 file (this command specifies a 64G SD Card). $ qemu-img create -f qcow2 \ -o backing_file=rpiosNNN.img,backing_fmt=raw,lazy_refcounts=on,preallocation=metadata \ raspiSD1.qcow2 64G 2. Pass the new sdcard raspiSD1.qcow2 as a disk to the qemu-system-aarch64 virtual machine emulator, also specify other relevant hardware such as the virtual RPi GPU, the virtual ethernet card, virtual keyboard/mouse etc. Such qemu command lines can become quite long and thus you should put the arguments in a .BAT file for Windows (or .sh file for Linux etc.) For .iso files with an OS for more normal hardware: 1. Create a blank thin provisioned virtual hard drive in qcow2 format (this command specifies a 0.5 TB HDD): $ qemu-img crate -f qcow2 -o lazy_refcounts=on,preallocation=metadata \ qemuPC1.qcow2 512G 2. Pass the new HDD qemuPC1.qcow2 as a disk to the qemu-system-x86_64 virtual machineemulator. Pass the someosNNN.iso file as a read only CD-ROM, also specify other hardware such as a virtual UEFI BIOS ROM, a virtual GPU etc. Such qemucommand lines can become quite long and thus you should put the argumentsin a .BAT file for Windows (or .sh file for Linux etc.). Hint: On Windows 10 original (1507), Notepad was the obvious program for editing .BAT files, later releases and Windows 11 may have Fouled things Up Beyond All Repair (FUBAR). P.S.: I am not sure if current qemu builds for Windows have a working audio driver, a few years ago it didn't . Enjoy Jakob -- Jakob Bohm, CIO, Partner, WiseMo A/S. https://www.wisemo.com Transformervej 29, 2860 Søborg, Denmark. Direct +45 31 13 16 10 This public discussion message is non-binding and may contain errors. WiseMo - Remote Service Management for PCs, Phones and Embedded
can not create the virtual machine
I receive this message:
Unable to complete install: 'internal error: process exited while
connecting to monitor: 2024-10-21T19:26:51.030843Z qemu-system-x86_64:
-blockdev
{"driver":"file","filename":"/home/xyz/Downloads/lubuntu-24.04.1-desktop-amd64
(1).iso","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}:
Could not open '/home/xyz/Downloads/lubuntu-24.04.1-desktop-amd64 (1).iso':
Permission denied'
Traceback (most recent call last):
File "/usr/share/virt-manager/virtManager/asyncjob.py", line 72, in
cb_wrapper
callback(asyncjob, *args, **kwargs)
File "/usr/share/virt-manager/virtManager/createvm.py", line 2008, in
_do_async_install
installer.start_install(guest, meter=meter)
File "/usr/share/virt-manager/virtinst/install/installer.py", line 695,
in start_install
domain = self._create_guest(
^^^
File "/usr/share/virt-manager/virtinst/install/installer.py", line 637,
in _create_guest
domain = self.conn.createXML(initial_xml or final_xml, 0)
File "/usr/lib/python3/dist-packages/libvirt.py", line 4529, in createXML
raise libvirtError('virDomainCreateXML() failed')
libvirt.libvirtError: internal error: process exited while connecting to
monitor: 2024-10-21T19:26:51.030843Z qemu-system-x86_64: -blockdev
{"driver":"file","filename":"/home/xyz/Downloads/lubuntu-24.04.1-desktop-amd64
(1).iso","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}:
Could not open '/home/xyz/Downloads/lubuntu-24.04.1-desktop-amd64 (1).iso':
Permission denied
Re: can not create the virtual machine
On 10/21/24 12:36, Alin Craciunescu wrote:
I receive this message:
Unable to complete install: 'internal error: process exited while
connecting to monitor: 2024-10-21T19:26:51.030843Z qemu-system-x86_64:
-blockdev
{"driver":"file","filename":"/home/xyz/Downloads/lubuntu-24.04.1-desktop-amd64 (1).iso","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}: Could not open '/home/xyz/Downloads/lubuntu-24.04.1-desktop-amd64 (1).iso': Permission denied'
Traceback (most recent call last):
File "/usr/share/virt-manager/virtManager/asyncjob.py", line 72, in
cb_wrapper
callback(asyncjob, *args, **kwargs)
File "/usr/share/virt-manager/virtManager/createvm.py", line 2008, in
_do_async_install
installer.start_install(guest, meter=meter)
File "/usr/share/virt-manager/virtinst/install/installer.py", line
695, in start_install
domain = self._create_guest(
^^^
File "/usr/share/virt-manager/virtinst/install/installer.py", line
637, in _create_guest
domain = self.conn.createXML(initial_xml or final_xml, 0)
File "/usr/lib/python3/dist-packages/libvirt.py", line 4529, in createXML
raise libvirtError('virDomainCreateXML() failed')
libvirt.libvirtError: internal error: process exited while connecting to
monitor: 2024-10-21T19:26:51.030843Z qemu-system-x86_64: -blockdev
{"driver":"file","filename":"/home/xyz/Downloads/lubuntu-24.04.1-desktop-amd64 (1).iso","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}: Could not open '/home/xyz/Downloads/lubuntu-24.04.1-desktop-amd64 (1).iso': Permission denied
Hi Alin,
it seems like the file /home/xyz/Downloads/lubuntu-24.04.1-desktop-amd64
(1).iso has lower permissions than expected. Try chown $USER:$USER on
this file and chmod 644, and launch qemu again.
Regards,
Pierrick
