Difference between revisions of "Nouveau"
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View loaded video module parameters and values: | View loaded video module parameters and values: | ||
modinfo -p video | modinfo -p video | ||
+ | |||
+ | ====Phantom Output Issue==== | ||
+ | |||
+ | It is possible for the nouveau driver to detect "phantom" outputs. For example, both VGA-1 and LVDS-1 are shown as connected but only LVDS-1 is present. | ||
+ | |||
+ | This causes display problems and a corrupted screen. | ||
+ | |||
+ | The problem can be overcome by disabling the phantom output (VGA-1 in the examples given) on the kernel command line of your boot loader. This can be achieved by appending the following: | ||
+ | |||
+ | video=VGA-1:d | ||
+ | |||
+ | Where '''d''' = disable. | ||
+ | |||
+ | The phantom output can also be disabled in X by adding the following to {{ic|/etc/X11/xorg.conf.d/20-nouveau.conf}}: | ||
+ | |||
+ | Section "Monitor" | ||
+ | Identifier "VGA-1" | ||
+ | Option "Ignore" "1" | ||
+ | EndSection | ||
+ | |||
+ | =====Source===== | ||
+ | |||
+ | http://gentoo-en.vfose.ru/wiki/Nouveau#Phantom_and_unpopulated_output_connector_issues |
Revision as of 19:36, 10 September 2013
zh-CN:Nouveau Template:Article summary start Template:Article summary text Template:Article summary heading Template:Article summary wiki Template:Article summary wiki Template:Article summary end
This article covers installing and configuring the Nouveau open source driver for NVIDIA graphic cards. For information about the official proprietary driver, see NVIDIA.
Contents
Coming from the proprietary NVIDIA driver
If you already installed the proprietary Nvidia driver, then remove it first:
# pacman -Rdds nvidia nvidia-utils nvidia-libgl
Be sure to also delete the /etc/X11/xorg.conf
file that the Nvidia driver created (or undo the changes), or else X will fail to properly load the Nouveau driver.
Installation
Before proceeding, figure out your card's codename (a more detailed list is available on Wikipedia) and have a look at the feature matrix to see what features are supported for your graphics card. Also make sure you have Xorg properly installed.
Install the DDX driver with the xf86-video-nouveau package, which is available in the official repositories. It pulls in nouveau-dri as a dependency, providing the DRI driver for 3D acceleration.
For 32-bit 3D support on x86_64, install lib32-nouveau-dri from the multilib repository.
Loading
The Nouveau kernel module should load fine automatically on system boot.
If it does not happen, then:
- Make sure you do not have
nomodeset
orvga=
as a kernel parameter, since Nouveau needs kernel mode-setting in order to run successfully (see below). - Also, check that you have not disabled Nouveau by using any modprobe blacklisting within
/etc/modprobe.d/
.
KMS
Kernel Mode Setting (KMS) is required by the Nouveau driver. As the system boots, the resolution will likely change when KMS initializes the display driver. Simply installing the Nouveau driver should be enough to get the system to recognize and initialize it in "Late start" mode (see below). See the Nouveau KernelModeSetting page for more details.
Late start
This method will start the KMS after the other kernel modules are loaded. You will see the text "Loading modules" and the size of the text may change, possibly with an undesirable flicker.
Early start
This method will start the KMS as early as possible in the boot process, when the initramfs is loaded.
To do this, add nouveau
to the MODULES
array in /etc/mkinitcpio.conf
:
MODULES="... nouveau ..."
If you are using a custom EDID file, you should embed it into initramfs as well:
/etc/mkinitcpio.conf
FILES="/lib/firmware/edid/your_edid.bin"
Re-generate the initial ramdisk image:
# mkinitcpio -p <kernel preset; e.g. linux>
If you're experiencing troubles with Nouveau leading to rebuild nouveau-drm several times for testing purposes, do not add nouveau
to the initramfs. It is too easy to forget to rebuild the initramfs and it will just make any testing harder. Just use "Late start" until you are confident the system is stable. There might be additional problems with initramfs if you need a custom firmware (generally not advised).
Tips and tricks
Keep NVIDIA driver installed
If you want to keep the proprietary NVIDIA driver installed, but want to use the Nouveau driver, comment out nouveau blacklisting in /etc/modprobe.d/nouveau_blacklist.conf
modifying it as follows:
#blacklist nouveau
And tell Xorg to load nouveau instead of nvidia by creating the file /etc/X11/xorg.conf.d/20-nouveau.conf
with the following content:
Section "Device" Identifier "Nvidia card" Driver "nouveau" EndSection
If you already used the NVIDIA driver, and want to test Nouveau without reboot, make sure the 'nvidia' module is no longer loaded:
# rmmod nvidia
Then load the 'nouveau' module:
# modprobe nouveau
And check that it loaded fine by looking at kernel messages:
$ dmesg
Installing the latest development packages
You may install the latest -git packages, through AUR:
- You can use mesa-gitAUR which will allow the installation of the latest Mesa (including the latest DRI driver).
- You can use xf86-video-nouveau-gitAUR which will allow the installation of the latest DDX driver.
- You can also try installing a newer kernel version, through packages like linux-mainlineAUR in which the Nouveau DRM code would allow better performance.
- To get the latest Nouveau improvements, you should use the linux-gitAUR package from the AUR, edit the PKGBUILD and use Nouveau's own kernel repository, which is currently located at git://anongit.freedesktop.org/git/nouveau/xf86-video-nouveau.
Upsteam driver sources can be found at the Nouveau Source page.
Tear-free compositing
Edit your /etc/X11/xorg.conf.d/20-nouveau.conf
, and add the following to the Device
section:
Section "Device" Identifier "nvidia card" Driver "nouveau" Option "GLXVBlank" "true" EndSection
Dual Head
Nouveau supports the xrandr extension for modesetting and multiple monitors. See the RandR12 page for tutorials.
Here is a full sample /etc/X11/xorg.conf.d/20-nouveau.conf
above for running 2 monitors in dual head mode. You may prefer to use a graphical tool to configure monitors like GNOME Control Center's Display panel (gnome-control-center display
).
# the right one Section "Monitor" Identifier "NEC" Option "PreferredMode" "1280x1024_60.00" EndSection # the left one Section "Monitor" Identifier "FUS" Option "PreferredMode" "1280x1024_60.00" Option "LeftOf" "NEC" EndSection Section "Device" Identifier "nvidia card" Driver "nouveau" Option "Monitor-DVI-I-1" "NEC" Option "Monitor-DVI-I-2" "FUS" EndSection Section "Screen" Identifier "screen1" Monitor "NEC" DefaultDepth 24 SubSection "Display" Depth 24 Virtual 2560 2048 EndSubSection Device "nvidia card" EndSection Section "ServerLayout" Identifier "layout1" Screen "screen1" EndSection
Setting console resolution
Use the fbset tool to adjust console resolution.
You can also pass the resolution to nouveau with the video= kernel line option (see KMS).
Power Management
GPU Scaling is in various stages of readiness depending on the GPU. See the Nouveau PowerManagement page for more details.
Enable MSI (Message Signaled Interrupts)
This may provide a slight performance advantage. It is only supported on NV50+ and is disabled by default.
Place the following in /etc/modprobe.d/nouveau.conf
:
options nouveau msi=1
If using early start, add the line FILES="/etc/modprobe.d/nouveau.conf"
to /etc/mkinitcpio.conf
, then re-generate kernel image:
# mkinitcpio -p <kernel preset; e.g. linux>
Reboot the system for the changes to take effect.
Optimus
You have two solutions to use Optimus on a laptop (aka hybrid graphics, when you have two GPU on you laptop) : bumblebee and PRIME
Troubleshooting
Add the following to your kernel command line (if using grub hit e
at the boot menu to edit) to turn on video debugging:
drm.debug=14 log_buf_len=16M
Create verbose Xorg log:
startx -- -logverbose 9 -verbose 9
View loaded video module parameters and values:
modinfo -p video
Phantom Output Issue
It is possible for the nouveau driver to detect "phantom" outputs. For example, both VGA-1 and LVDS-1 are shown as connected but only LVDS-1 is present.
This causes display problems and a corrupted screen.
The problem can be overcome by disabling the phantom output (VGA-1 in the examples given) on the kernel command line of your boot loader. This can be achieved by appending the following:
video=VGA-1:d
Where d = disable.
The phantom output can also be disabled in X by adding the following to /etc/X11/xorg.conf.d/20-nouveau.conf
:
Section "Monitor" Identifier "VGA-1" Option "Ignore" "1" EndSection
Source
http://gentoo-en.vfose.ru/wiki/Nouveau#Phantom_and_unpopulated_output_connector_issues