mirror of
https://github.com/Qubes-Community/Contents.git
synced 2024-12-24 06:39:25 -05:00
97 lines
2.5 KiB
Markdown
97 lines
2.5 KiB
Markdown
|
---
|
||
|
layout: doc
|
||
|
title: Linux HVM Tips
|
||
|
permalink: /doc/linux-hvm-tips/
|
||
|
redirect_from:
|
||
|
- /en/doc/linux-hvm-tips/
|
||
|
- /doc/LinuxHVMTips/
|
||
|
- /wiki/LinuxHVMTips/
|
||
|
---
|
||
|
|
||
|
Tips for Linux in HVM domain
|
||
|
============================
|
||
|
|
||
|
How to fix bootup kernel error
|
||
|
-------------------------------
|
||
|
|
||
|
The HVM may pause on boot, showing a fixed cursor.
|
||
|
After a while a series of warnings may be shown similar to this:
|
||
|
|
||
|
BUG: soft lockup - CPU#0 stuck for 23s! [systemd-udevd:244]
|
||
|
|
||
|
To fix this:
|
||
|
|
||
|
1. Kill the HVM.
|
||
|
1. Start the HVM
|
||
|
1. Press "e" at the grub screen to edit the boot parameters
|
||
|
1. Find the /vmlinuz line, and edit it to replace "rhgb" with "modprobe.blacklist=bochs_drm"
|
||
|
1. Press "Ctrl-x" to start the HVM
|
||
|
|
||
|
If this solves the problem then you will want to make the change permanent:
|
||
|
|
||
|
1. Edit the file `/etc/default/grub`.
|
||
|
1. Find the line which starts:
|
||
|
~~~
|
||
|
GRUB_CMDLINE_LINUX=
|
||
|
~~~
|
||
|
1. Remove this text from that line:
|
||
|
~~~
|
||
|
rhgb
|
||
|
~~~
|
||
|
1. Add this text to that line:
|
||
|
~~~
|
||
|
modprobe.blacklist=bochs_drm
|
||
|
~~~
|
||
|
1. Run this command:
|
||
|
~~~
|
||
|
grub2-mkconfig --output=/boot/grub2/grub.cfg
|
||
|
~~~
|
||
|
|
||
|
The HVM should now start normally.
|
||
|
|
||
|
|
||
|
Screen resolution
|
||
|
-----------------
|
||
|
|
||
|
Some kernel/Xorg combinations use only 640x480 in HVM, which is quite small.
|
||
|
To enable maximum resolution, some changes in the Xorg configuration are needed:
|
||
|
1. Force "vesa" video driver
|
||
|
2. Provide wide horizontal synchronization range
|
||
|
|
||
|
To achieve it (all commands to be run as root):
|
||
|
|
||
|
1. Generate XOrg configuration (if you don't have it):
|
||
|
~~~
|
||
|
X -configure :1 && mv ~/xorg.conf.new /etc/X11/xorg.conf
|
||
|
~~~
|
||
|
|
||
|
1. Add HorizSync line to Monitor section, it should look something like:
|
||
|
~~~
|
||
|
Section "Monitor"
|
||
|
Identifier "Monitor0"
|
||
|
VendorName "Monitor Vendor"
|
||
|
ModelName "Monitor Model"
|
||
|
HorizSync 30.0 - 60.0
|
||
|
EndSection
|
||
|
~~~
|
||
|
|
||
|
1. Change driver to "vesa" in Device section:
|
||
|
~~~
|
||
|
Section "Device"
|
||
|
# (...)
|
||
|
Identifier "Card0"
|
||
|
Driver "vesa"
|
||
|
VendorName "Technical Corp."
|
||
|
BoardName "Unknown Board"
|
||
|
BusID "PCI:0:2:0"
|
||
|
EndSection
|
||
|
~~~
|
||
|
|
||
|
Now you should get resolution of at least 1280x1024 and should be able to choose other modes.
|
||
|
|
||
|
Qubes agents
|
||
|
------------
|
||
|
|
||
|
Linux Qubes agents are written primarily for PV qubes, but it is possible to run them also in a HVM qube.
|
||
|
However some work may be required to achieve this. Check [this thread](https://groups.google.com/group/qubes-devel/browse_thread/thread/081df4a43e49e7a5).
|