No /dev/dri device on my host system with intel CPU

R

rakali

Active Member
Jan 2, 2020
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renderTimingPixel.png
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Hi, I am trying to setup intel gpu transcoding, cpu is 9700K, but cannot even see the /dev/dri device on the host
I do not have any /dev/dri device on the host...

Code: 
ls -l /dev/dri
ls: cannot access '/dev/dri': No such file or directory


Code: 
lsmod | grep i915
i915                 2306048  0
drm_kms_helper        245760  1 i915
cec                    53248  2 drm_kms_helper,i915
i2c_algo_bit           16384  1 i915
drm                   548864  2 drm_kms_helper,i915
video                  53248  1 i915



Code: 
vainfo
error: can't connect to X server!
error: failed to initialize display



Code: 
cat /etc/kernel/cmdline
root=ZFS=rpool/ROOT/pve-1 boot=zfs intel_iommu=on iommu=pt i915.enable_gvt=1 rootdelay=10 pcie_acs_override=downstream i915.alpha_support=1


Code: 
cat /etc/modules
# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.
vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd
vendor-reset
# Modules required for Intel GVT
intel_agp
i915
kvmgt
exngt
vfio-mdev



Code: 
cat /etc/modprobe.d/blacklist.conf
blacklist nouveau
blacklist nvidia
blacklist nvidiafb
blacklist snd_hda_codec_hdmi
blacklist snd_hda_intel
blacklist snd_hda_codec
blacklist snd_hda_core
blacklist radeon
blacklist amdgpu


Code: 
dpkg -l | grep Intel
ii  i965-va-driver:amd64                 2.4.1+dfsg1-1                  amd64        VAAPI driver for Intel G45 & HD Graphics family
 
osaether said:
Have you enabled Intel graphics and disabled IOMMU in the BIOS?
Click to expand...

Intel graphics is enabled in BIOS.

I am not sure I can disable IOMMU with my BIOS? Can you explain further please?

My motherboard is
Code: 
gigabyte aorus z390 ultra

As above in my kernel commands, I enable iommu in order to do GPU passthrough of my AMD Vega 64
 
I had to disable IOMMU in BIOS on my machine to get /dev/dri on the host but I am not doing pass through of Intel graphics. I use Intel graphics in a container.
 
osaether said:
I had to disable IOMMU in BIOS on my machine to get /dev/dri on the host but I am not doing pass through of Intel graphics. I use Intel graphics in a container.
Click to expand...
The same. I am not doing passthrough of the Intel GPU. I only passthrough the AMD GPU.

So how do you disable IOMMU in BIOS?
 
I have my DVT set to 512MB does that make any difference? Still cannot find IOMMU in BIOS
 
Is this the problem?

Code: 
00:02.0 VGA compatible controller: Intel Corporation CoffeeLake-S GT2 [UHD Graphics 630] (rev 02)
    DeviceName: Onboard - Video
    Subsystem: Gigabyte Technology Co., Ltd UHD Graphics 630 (Desktop 9 Series)
    Kernel driver in use: vfio-pci
    Kernel modules: i915

How do I get the i915 driver to load instead of the vfio-pci?
 
Last edited:
rakali said:

renderTimingPixel.png
​

Hi, I am trying to setup intel gpu transcoding, cpu is 9700K, but cannot even see the /dev/dri device on the host
I do not have any /dev/dri device on the host...

Code: 
ls -l /dev/dri
ls: cannot access '/dev/dri': No such file or directory


Code: 
lsmod | grep i915
i915                 2306048  0
drm_kms_helper        245760  1 i915
cec                    53248  2 drm_kms_helper,i915
i2c_algo_bit           16384  1 i915
drm                   548864  2 drm_kms_helper,i915
video                  53248  1 i915



Code: 
vainfo
error: can't connect to X server!
error: failed to initialize display



Code: 
cat /etc/kernel/cmdline
root=ZFS=rpool/ROOT/pve-1 boot=zfs intel_iommu=on iommu=pt i915.enable_gvt=1 rootdelay=10 pcie_acs_override=downstream i915.alpha_support=1


Code: 
cat /etc/modules
# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.
vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd
vendor-reset
# Modules required for Intel GVT
intel_agp
i915
kvmgt
exngt
vfio-mdev



Code: 
cat /etc/modprobe.d/blacklist.conf
blacklist nouveau
blacklist nvidia
blacklist nvidiafb
blacklist snd_hda_codec_hdmi
blacklist snd_hda_intel
blacklist snd_hda_codec
blacklist snd_hda_core
blacklist radeon
blacklist amdgpu


Code: 
dpkg -l | grep Intel
ii  i965-va-driver:amd64                 2.4.1+dfsg1-1                  amd64        VAAPI driver for Intel G45 & HD Graphics family
Click to expand...
Did you sort this out? i'm having the same problem and can't wrap my head around it..
 
did you try to do
Code: 
modprobe i915
?
 
rakali said:
Is this the problem?

Code: 
00:02.0 VGA compatible controller: Intel Corporation CoffeeLake-S GT2 [UHD Graphics 630] (rev 02)
    DeviceName: Onboard - Video
    Subsystem: Gigabyte Technology Co., Ltd UHD Graphics 630 (Desktop 9 Series)
    Kernel driver in use: vfio-pci
    Kernel modules: i915

How do I get the i915 driver to load instead of the vfio-pci?
Click to expand...
Hi I know its a old post but please could you explain how to get the i915 driver to load instead of the vfio-pci?

Tried modprobe i915 but no diferens
Thanks
 
Last edited:
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