42aaf37241
xf86platformProbeDev didn't check the device path, fix it. This is a problem when trying to set up a non-PCI device via explicit xorg.conf.d configuration. An USB DisplayLink device, being non-PCI was always set up as a GPU device assigned to screen 0 instead of a regular framebuffer, potentially having its own dedicated screen, despite such configuration as below. Only the relevant parts of the configuration are quoted, it's part of a larger context with an Intel chip that has 3 outputs: * DP1 connected to an LCD panel, * VGA1 connected to an external monitor, * HDMI1 unconnected and having no user visible connector Section "ServerFlags" Option "AutoBindGPU" "false" EndSection ... Section "Device" Identifier "Intel2" Driver "intel" BusID "PCI:0:2:0" Screen 2 Option "Monitor-HDMI1" "HDMI1" Option "ZaphodHeads" "HDMI1" EndSection Section "Device" Identifier "UDL" Driver "modesetting" Option "kmsdev" "/dev/dri/card0" #BusID "usb:0:1.2:1.0" Option "Monitor-DVI-I-1" "DVI-I-1" Option "ShadowFB" "on" Option "DoubleShadow" "on" EndSection ... Section "Screen" Identifier "SCREEN2" Option "AutoServerLayout" "on" Device "UDL" GPUDevice "Intel2" Monitor "Monitor-DVI-I-1" SubSection "Display" Modes "1024x768" Depth 24 EndSubSection EndSection Section "ServerLayout" Identifier "LAYOUT" Option "AutoServerLayout" "on" Screen 0 "SCREEN" Screen 1 "SCREEN1" RightOf "SCREEN" Screen 2 "SCREEN2" RightOf "SCREEN1" EndSection On the particular machine I was trying to set up an UDL device, I found the following structure was being used to match the device to a platform device while I was debugging the issue: xf86_platform_devices[0] == Intel, /dev/dri/card1, primary platform device xf86_platform_devices[1] == UDL, /dev/dri/card0 devList[0] == "Intel0", ZaphodHeads: DP1 devList[1] == "Intel1", ZaphodHeads: VGA1 devList[2] == "UDL" devList[3] == "Intel2", ZaphodHeads: HDMI1 (intended GPU device to UDL) When xf86platformProbeDev() matched the UDL device, the BusID check failed in both cases of: * BusID "usb:0:1.2:1.0" was specified * Option "kmsdev" "/dev/dri/card0" was specified As a result, xf86platformProbeDev() went on to call probeSingleDevice() with xf86_platform_devices[0] and devList[2], resulting in the UDL device being set up as a GPU device assigned to the first screen instead of as a framebuffer on the third screen as the configuration specified. Checking Option "kmsdev" in code code may be a layering violation. But the modesetting driver is actually part of the Xorg sources instead of being an external driver, so he "kmsdev" path knowledge may be used here. Signed-off-by: Böszörményi Zoltán <zboszor@pr.hu> |
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.gitlab-ci | ||
Xext | ||
Xi | ||
composite | ||
config | ||
damageext | ||
dbe | ||
dix | ||
doc | ||
dri3 | ||
exa | ||
fb | ||
glamor | ||
glx | ||
hw | ||
include | ||
m4 | ||
man | ||
mi | ||
miext | ||
os | ||
present | ||
pseudoramiX | ||
randr | ||
record | ||
render | ||
test | ||
xfixes | ||
xkb | ||
.appveyor.yml | ||
.dir-locals.el | ||
.gitignore | ||
.gitlab-ci.yml | ||
.travis.yml | ||
COPYING | ||
Makefile.am | ||
README.md | ||
autogen.sh | ||
configure.ac | ||
devbook.am | ||
docbook.am | ||
manpages.am | ||
meson.build | ||
meson_options.txt | ||
xorg-server.m4 | ||
xorg-server.pc.in | ||
xserver.ent.in |
README.md
X Server
The X server accepts requests from client applications to create windows, which are (normally rectangular) "virtual screens" that the client program can draw into.
Windows are then composed on the actual screen by the X server (or by a separate composite manager) as directed by the window manager, which usually communicates with the user via graphical controls such as buttons and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the following article: https://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the Xorg mailing list:
https://lists.freedesktop.org/mailman/listinfo/xorg
The master development code repository can be found at:
https://gitlab.freedesktop.org/xorg/xserver
For patch submission instructions, see:
https://www.x.org/wiki/Development/Documentation/SubmittingPatches
As with other projects hosted on freedesktop.org, X.Org follows its Code of Conduct, based on the Contributor Covenant. Please conduct yourself in a respectful and civilized manner when using the above mailing lists, bug trackers, etc: