qubes-doc/user/troubleshooting/autostart-troubleshooting.rst
Marek Marczykowski-Górecki b93b3c571e
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=========================
Autostart troubleshooting
=========================
The following instructions are valid for **Qubes OS R4.0 legacy mode**
and **Qubes OS R4.1 legacy and UEFI modes**. For **Qubes OS R4.0 in UEFI mode**, there is no GRUB, so manual boot from another operating system
is needed.
In several cases, there is a need to prevent ``autostart=True`` for
qubes on boot. For example:
- ``sys-usb`` was enabled, but the only keyboard is attached via USB,
and the ``qubes.InputKeyboard`` service is disabled.
- A PCI device assigned to an autostarting qube crashes the system
(e.g., a GPU or RAID controller card).
To address this, there is a ``qubes.skip_autostart`` option for the
kernel command line. You can use it at the grub boot menu.
|grub1.png|
Press the ``E`` key on the first prompt (or your custom prompt). Then,
press the down arrow key multiple times to reach the line starting with
``module2``.
|grub2.png|
Append ``qubes.skip_autostart`` to the end of this line (generally after
the ``rhgb quiet`` options).
|grub3.png|
Press ``Ctrl+X`` to boot with the edited GRUB entry. The boot will
proceed as usual from here, except that no qube will be autostarted.
.. |grub1.png| image:: /attachment/doc/grub1.png
.. |grub2.png| image:: /attachment/doc/grub2.png
.. |grub3.png| image:: /attachment/doc/grub3.png