how to check which graphic controller is in use
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To find out which graphics controller is currently used by system/programs use the following two commands:
grep LoadModule /var/log/Xorg.0.log grep Driver /etc/X11/xorg.conf
The first will give you a list of all loaded modules (or modules which X tried to load), and the second will give you list of all devices that are configured to run on your box. Intersection of these tho files gives you running controller.
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Define it in
/etc/X11/xorg.conf
Not to go in too much details, but define
Driver
line inDevice
section. If it is installed and configured in
/etc/X11/xorg.conf
, it'll run. Please keep in mind that drivers are sometimes generic, meaning nvidia is the driver for all nvidia cards, so i915 could be the appropriate driver for i965.@Hennes already partly answered it above. It seems that it is an
lshw
bug, to show PCI bus speed for every device either on PCI or PCIe. Check this pic: NVidia GeForce GT220 (not mine, but I have two NVidias and lshw for both tells 33MHz).
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Updated on September 18, 2022Comments
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Admin over 1 year
On my linux laptop I have two VGA compatible controllers (information from
lshw
):- product: GK107 [GeForce GT 640M]
physical id: 0
bus info: pci@0000:01:00.0
..
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list
configuration: driver=nouveau latency=0
resources: irq:16 memory:f2000000-f2ffffff memory:e0000000-efffffff memory:f0000000-f1ffffff ioport:3000(size=128) - product: 3rd Gen Core processor Graphics Controller
physical id: 2
bus info: pci@0000:00:02.0
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:44 memory:f3000000-f33fffff memory:d0000000-dfffffff ioport:4000(size=64)
lspci | grep VGA
output:- 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
- 01:00.0 VGA compatible controller: NVIDIA Corporation GK107 [GeForce GT 640M] (rev a1)
When I run
glxgears
I've got the following output (while application is running):libGL error: failed to load driver: i965 libGL error: Try again with LIBGL_DEBUG=verbose for more details. XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0" after 2968 requests (2966 known processed) with 0 events remaining.
So I suppose it fails with intel VGA?
I have installed followed drivers:
- intel-dri
- xf86-video-intel 2.20 (X.org Intel i810/i830/i915/945G/G965+ video drivers)
- xf86-video-nouveau
1 How can I check which controller is used by system/programs?
2 How can I ensure specific controller to be used?
3 How can I ensure that driver i965 is loaded, instead i915 (from the
lshw
output)? (the proper for my intel agp)4 Why
lshw
shows clock: 33MHz? For GeForce 640M should be 625 MHz.I'm using Linux Arch.
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week over 11 yearsbumblebee-project.org - nvidia optimus on linux
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ganesh over 11 yearsThe 915 seems to be on a PCI bus (pci@0000:00:02.0), not on a PCIe bus. A PCI bus runs either at 33MHz or at 66MHz. (33Mhz for most PCs, 66 Mhz for workstations, servers, ancient apple G3 etc).
- product: GK107 [GeForce GT 640M]
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fersarr about 11 yearsSpeedyGonsales, when trying the second command, I get this: grep: /etc/X11/xorg.conf: No such file or directory... That means I dont have anything installed? what should I do? I thought I had just installed them using howopensource.com/2012/10/…