I have a headless desktop running Ubuntu 22.04 which needs to be accessible via Team Viewer. To do so, have followed the instructions here, having installed xserver-xorg-video-dummy and created the following xorg config at /etc/X11/xorg.conf:
# This xorg configuration file is meant to be used
# to start a dummy X11 server.
# For details, please see:
# https://www.xpra.org/xorg.conf
Section "Device"
Identifier "Configured Video Device"
Driver "dummy"
#VideoRam 4096000
#VideoRam 256000
VideoRam 16384
EndSection
Section "Monitor"
Identifier "Configured Monitor"
HorizSync 5.0 - 1000.0
VertRefresh 5.0 - 200.0
Modeline "1920x1080" 23.53 1920 1952 2040 2072 1080 1106 1108 1135
EndSection
Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Virtual 1920 1080
EndSubSection
EndSection
This actually works great. But visual applications are quite slow, and upon inspection have found that the graphics device under GNOME system info is llvmpipe (LLVM 15.0.6, 256 bits). From what I can gather, this is very basic rendering driver, not what should be running on the integrated graphics processor.
$ sudo lshw -c video
*-display UNCLAIMED
description: VGA compatible controller
product: CoffeeLake-S GT2 [UHD Graphics 630]
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm vga_controller bus_master cap_list
configuration: latency=0
resources: memory:a0000000-a0ffffff memory:90000000-9fffffff ioport:4000(size=64) memory:c0000-dffff
*-graphics
product: EFI VGA
physical id: 2
logical name: /dev/fb0
capabilities: fb
configuration: depth=32 resolution=800,600
lspci -k
00:00.0 Host bridge: Intel Corporation 8th Gen Core 4-core Desktop Processor Host Bridge/DRAM Registers [Coffee Lake S] (rev 08)
DeviceName: Onboard - Other
Subsystem: Intel Corporation 8th Gen Core 4-core Desktop Processor Host Bridge/DRAM Registers [Coffee Lake S]
Kernel driver in use: skl_uncore
Kernel modules: ie31200_edac
00:02.0 VGA compatible controller: Intel Corporation CoffeeLake-S GT2 [UHD Graphics 630]
DeviceName: Onboard - Video
Subsystem: Intel Corporation CoffeeLake-S GT2 [UHD Graphics 630]
Kernel modules: i915
$ glxinfo -B
name of display: :1
display: :1 screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
Vendor: Mesa/X.org (0xffffffff)
Device: llvmpipe (LLVM 15.0.6, 256 bits) (0xffffffff)
Version: 22.2.5
Accelerated: no
Video memory: 7849MB
Unified memory: no
Preferred profile: core (0x1)
Max core profile version: 4.5
Max compat profile version: 4.5
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.2
OpenGL vendor string: Mesa/X.org
OpenGL renderer string: llvmpipe (LLVM 15.0.6, 256 bits)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 22.2.5
OpenGL core profile shading language version string: 4.50
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL version string: 4.5 (Compatibility Profile) Mesa 22.2.5
OpenGL shading language version string: 4.50
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile
OpenGL ES profile version string: OpenGL ES 3.2 Mesa 22.2.5
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
The machine has no dedicated graphics card, but can I get it to use the integrated graphics? Or is it already using them? Changing the "Device" identifier and driver in xorg.conf only results in a broken x server, and I have to drop to a TTY session and reset the file or remove it.
