qubes-doc/managing-os/linux-hvm-tips.md

---
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
============================

Screen resolution
-----------------

Some kernel/Xorg combination use only 640x480 in HVM, which is quite small. To enable maximum resolution, some changes in Xorg configuration are needed:

1.  Force "vesa" video driver
2.  Provide wide horizontal synchronization range

To achieve it (all commands run as root):

1.  Generate XOrg configuration (if you don't have it):

    ~~~
    X -configure :1 && mv ~/xorg.conf.new /etc/X11/xorg.conf
    ~~~

2.  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
    ~~~

3.  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 at least 1280x1024 and be able to choose other modes.

Qubes agents
------------

Linux Qubes agents are written with PV domain in mind, but it looks to be possible to run them also in HVM domain. However some work is required to achieve it. Check [this thread](https://groups.google.com/group/qubes-devel/browse_thread/thread/081df4a43e49e7a5).
LinuxHVMTips changed initial version: screen resolution and qubes agents 2013-01-08 07:05:31 -05:00			`---`
wiki -> doc migration 2015-04-10 16:17:45 -04:00			`layout: doc`
Update page titles from CamelCase to lowercase-hyphen-separated (closes QubesOS/qubes-issues#1205) 2015-10-13 23:31:03 -04:00			`title: Linux HVM Tips`
Remove en/ from URLs (QubesOS/qubes-issues#1333) 2015-10-28 18:14:40 -04:00			`permalink: /doc/linux-hvm-tips/`
Change URIs from CamelCase to lowercase-hyphen-separated 2015-10-11 03:04:59 -04:00			`redirect_from:`
Remove en/ from URLs (QubesOS/qubes-issues#1333) 2015-10-28 18:14:40 -04:00			`- /en/doc/linux-hvm-tips/`
Change URIs from CamelCase to lowercase-hyphen-separated 2015-10-11 03:04:59 -04:00			`- /doc/LinuxHVMTips/`
			`- /wiki/LinuxHVMTips/`
LinuxHVMTips changed initial version: screen resolution and qubes agents 2013-01-08 07:05:31 -05:00			`---`

			`Tips for Linux in HVM domain`
			`============================`

			`Screen resolution`
			`-----------------`

			`Some kernel/Xorg combination use only 640x480 in HVM, which is quite small. To enable maximum resolution, some changes in Xorg configuration are needed:`

			`1. Force "vesa" video driver`
			`2. Provide wide horizontal synchronization range`

			`To achieve it (all commands run as root):`

Fix a few typos 2016-01-10 18:41:30 -05:00			`1. Generate XOrg configuration (if you don't have it):`
LinuxHVMTips changed initial version: screen resolution and qubes agents 2013-01-08 07:05:31 -05:00
replaced all github flavored code blocks with fenced kramdown code blocks 2015-09-26 19:00:33 -04:00			`~~~`
LinuxHVMTips changed initial version: screen resolution and qubes agents 2013-01-08 07:05:31 -05:00			`X -configure :1 && mv ~/xorg.conf.new /etc/X11/xorg.conf`
replaced all github flavored code blocks with fenced kramdown code blocks 2015-09-26 19:00:33 -04:00			`~~~`
LinuxHVMTips changed initial version: screen resolution and qubes agents 2013-01-08 07:05:31 -05:00
Many links fixed Conflicts: BuildingArchlinuxTemplate.md BuildingNonFedoraTemplate.md ContributingHowto.md HCLR1.md InstallNvidiaDriver.md InstallationIsoBuilding.md LinuxHVMTips.md Mutt.md Qrexec.md Qrexec3.md Qrexec3Implementation.md QubesBuilder.md QubesBuilderDetails.md QubesDevelopers.md QubesFirewall.md SecurityCriticalCode.md SystemDoc/VMInterface.md UserDoc/SplitGpg.md VMSudo.md VPN.md WindowsDebugging.md 2015-04-21 20:07:29 -04:00			`2. Add HorizSync line to Monitor section, it should look something like:`
LinuxHVMTips changed initial version: screen resolution and qubes agents 2013-01-08 07:05:31 -05:00
replaced all github flavored code blocks with fenced kramdown code blocks 2015-09-26 19:00:33 -04:00			`~~~`
LinuxHVMTips changed initial version: screen resolution and qubes agents 2013-01-08 07:05:31 -05:00			`Section "Monitor"`
			`Identifier "Monitor0"`
			`VendorName "Monitor Vendor"`
			`ModelName "Monitor Model"`
			`HorizSync 30.0 - 60.0`
			`EndSection`
replaced all github flavored code blocks with fenced kramdown code blocks 2015-09-26 19:00:33 -04:00			`~~~`
LinuxHVMTips changed initial version: screen resolution and qubes agents 2013-01-08 07:05:31 -05:00
			`3. Change driver to "vesa" in Device section:`

replaced all github flavored code blocks with fenced kramdown code blocks 2015-09-26 19:00:33 -04:00			`~~~`
LinuxHVMTips changed initial version: screen resolution and qubes agents 2013-01-08 07:05:31 -05:00			`Section "Device"`
			`# (...)`
			`Identifier "Card0"`
			`Driver "vesa"`
			`VendorName "Technical Corp."`
			`BoardName "Unknown Board"`
			`BusID "PCI:0:2:0"`
			`EndSection`
replaced all github flavored code blocks with fenced kramdown code blocks 2015-09-26 19:00:33 -04:00			`~~~`
LinuxHVMTips changed initial version: screen resolution and qubes agents 2013-01-08 07:05:31 -05:00
			`Now you should get at least 1280x1024 and be able to choose other modes.`

			`Qubes agents`
			`------------`

Remove zero-width spaces (U+200B) left by trac 2015-05-08 09:17:21 -04:00			`Linux Qubes agents are written with PV domain in mind, but it looks to be possible to run them also in HVM domain. However some work is required to achieve it. Check [this thread](https://groups.google.com/group/qubes-devel/browse_thread/thread/081df4a43e49e7a5).`