strike2901's questions

because of slow cold start and bad performances, I installed Firefox in .deb mode via Firefox PPA instead of snap on Ubuntu 22. The problem here is WebGL which is not working.

When I start Firefox, I have this error :

$ firefox
[GFX1-]: No GPUs detected via PCI
[GFX1-]: glxtest: process failed (received signal 11)

my laptop haves a Nvidia PRIME GPU :

$ lspci
...
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 630 (rev 04)
...
01:00.0 3D controller: NVIDIA Corporation GP107M [GeForce GTX 1050 Mobile] (rev a1)
...

Thank by advance for your answers ?

I've modified some old electrical plans with Inkscape who are scanned. Now I have to re-convert them into PDF format, then merge them to the original document.

The problem is that, with Inkscape, I get some issues on the document, like unexpected rectangles with shade.

When I convert it with rsvg-convert, raster images are compressed with a poor quality, but they are already bad so the result is not good ?. I use the following command :

rsvg-convert --keep-image-data -a -f pdf 2.svg > out.pdf

And I get the result at right :

Finally, with imagemagick, everything is rastered, even added texts and elements and quality is bad too.

How can I solve this problem, I think the best is rsvg-convert, but for the moment it's not good enough for me...

Thank by advance for your answers ?

I have a Dell XPS 15 under Ubuntu 20.04 with an Intel UHD 630 and Nvidia GTX 1050 configured in "on-demand" mode. In gaming it works properly. However when I use Firefox to load this demo under the Intel GPU, I can display up to 1000 fishes at 60FPS. Under the Nvidia GPU, it fluctuates between 20 and 30FPS, even with one fish. Under chromuim-based browser it's worse and limited at 15FPS.

Thanks by advance for your answers ?

I have an intel uhd 630 graphic card working under Ubuntu 20.04. After a configuration of Firefox, it can use the hardware graphic decoding for H264 or VP9. But with chromium-based browser I can't enable hardware decoding : in chrome://gpu (or opera://gpu or even vivaldi://gpu) I got this error :

Accelerated video decode has been disabled, either via blocklist, about:flags or the command line.
Disabled Features: video_decode

I follow many tutorial, but I can't find the flag :

enable-accelerated-video-decode

Thanks in advance for your answers ?

I bought a 2017 DELL XPS 9560 with a GTX 1050 and installed Ubuntu 20.04 with the nvidia-470 driver. The problem is that in performance mode everything is OK, I have for example PCSX2 wich works correctly, and processes that use graphic rendering appears in nvidia-smi. Nevetheless, in On-Demand mode, only few apps works, such as GLXGears, or MPV Player. Other like Firefox or Google Chrome doesn't appear in nvidia-smi and not work well under WebGL samples. PCSX2 is absolutely not working and return this error :

Error: GLLoader failed to get GL version

and

(p) GS plugin failed to open!(thread:MTGS)(thread:EE Core)

To launch the programs in On-Demand mode, I use this command line :

__NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia myprogram

or use the ubnutu shortcut "Lauch using the dedicated graphics card", same result...

Thanks by advance for your answers ?️

I was using a 4.15.0-20-generic default kernel, but for some hardware support with virtualization I was needed to build a new kernel from the kernel.org sources. I've just setted some modules to be loaded as module and not built-in, for details about what I've done its here

I use PCSX2 on this computer (the host in my case) but it didn't works with this new kernel (5.4.6), and I get this error :

Failed to create the opengl context. Check your drivers support openGL 3.3

I already tried to install pcsx2-unstable to see if it makes difference but not and also with another kernel (4.19.91) but I get the same issue.

I need to passtrough a USB 3.0 controller for a VM under qemu.

My lspci -nnk is :

...
02:00.0 USB controller [0c03]: Renesas Technology Corp. uPD720201 USB 3.0 Host Controller [1912:0014] (rev 03)
    Kernel driver in use: xhci_hcd
03:00.0 USB controller [0c03]: VIA Technologies, Inc. VL805 USB 3.0 Host Controller [1106:3483] (rev 01)
    Subsystem: Gigabyte Technology Co., Ltd VL805 USB 3.0 Host Controller [1458:5007]
    Kernel driver in use: xhci_hcd
...

The one I want to passtrough is the uPD720201, it is lonely in its IOMMU group.

My vfio.conf is :

options vfio-pci ids=1002:68f9,1002:aa68,1912:0014 disable_vga=1
#Note : the 1002:68f9 and 1002:aa68 are the gpu card, which is correctly pass trough

But now the problem seems to be the xhci_hcd driver overrides the vfio driver, because it seems to be correctly loaded at boot :

$ dmesg | grep "vfio"
[    4.475492] vfio: unknown parameter 'vfio_iommu_type1' ignored
[    4.476319] vfio: unknown parameter 'vfio_virqfd' ignored
[    4.477177] vfio: unknown parameter 'vfio_pci' ignored
[    4.478023] vfio: unknown parameter 'ids' ignored
[   21.546903] vfio-pci 0000:05:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=none
[   21.568068] vfio_pci: add [1002:68f9[ffff:ffff]] class 0x000000/00000000
[   21.588151] vfio_pci: add [1002:aa68[ffff:ffff]] class 0x000000/00000000
[   21.588824] vfio_pci: add [1912:0014[ffff:ffff]] class 0x000000/00000000
[   27.296307] vfio-pci 0000:05:00.0: vgaarb: changed VGA decodes: olddecodes=none,decodes=none:owns=none

I already try to blacklist xhci_hcd in blacklist.conf and grub :

/etc/modprobe.d/blacklist.conf
...
blacklist xhci_hcd
...

/etc/default/grub
...
GRUB_CMDLINE_LINUX_DEFAULT="amd_iommu=on iommu=pt kvm_amd.npt=1 modprobe.blacklist=xhci_hcd"
...

I have of course do a update-initramfs -u and a update-grub2 after those modifications. In all cases it has no effect, I always have "Kernel driver in use: xhci_hcd" The only way I found to disable xhci_hcd is to unbind my card by :

$ echo '0000:02:00.0' | tee /sys/bus/pci/devices/0000:02:00.0/driver/unbind

but I don't know how to execute it at boot (probably before vfio assignment).

Do you know a solution to disable xhci_hcd (or another method) to get it work?

I tried, I have this:

The command already appears but all on one line, so I just put carriage returns between them.

Now my onboard USB3 controller is disabled ( I've tried to put a USB device on it and it is realy disabled ) but not my added one.

My lspci -nnk is :

...
02:00.0 USB controller [0c03]: Renesas Technology Corp. uPD720201 USB 3.0 Host Controller [1912:0014] (rev 03)
    Kernel driver in use: xhci_hcd
03:00.0 USB controller [0c03]: VIA Technologies, Inc. VL805 USB 3.0 Host Controller [1106:3483] (rev 01)
    Subsystem: Gigabyte Technology Co., Ltd VL805 USB 3.0 Host Controller [1458:5007]
...

Note : now my grub file is (and it make what I describe above persistant) :

/etc/default/grub
...
GRUB_CMDLINE_LINUX="amd_iommu=on iommu=pt kvm_amd.npt=1"
GRUB_CMDLINE_LINUX="modprobe.blacklist=xhci_hcd"
...

I have purchased a cheap usb 3.0 controller on Ebay based on the VIA VL805,I have tested it on a dell OEM motherboard and it works fine.

But now on my gigabyte 990FXA-ud3 it not works, the xhci driver is not setup :

02:00.0 USB controller [0c03]: VIA Technologies, Inc. VL805 USB 3.0 Host Controller [1106:3483] (rev 01)
    Subsystem: VIA Technologies, Inc. VL805 USB 3.0 Host Controller [1106:3483]
03:00.0 USB controller [0c03]: VIA Technologies, Inc. VL805 USB 3.0 Host Controller [1106:3483] (rev 01)
    Subsystem: Gigabyte Technology Co., Ltd VL805 USB 3.0 Host Controller [1458:5007]
    Kernel driver in use: xhci_hcd

as you can see my motherboard uses the same chip as the cheap controller, it's a pure coincidence. The cheap one is situated on bus 2

my dmesg indicates this error :

dmesg | grep xhci
[    1.257762] xhci_hcd 0000:02:00.0: xHCI Host Controller
[    1.258353] xhci_hcd 0000:02:00.0: new USB bus registered, assigned bus number 8
[   17.466094] xhci_hcd 0000:02:00.0: can't setup: -110
[   17.466913] xhci_hcd 0000:02:00.0: USB bus 8 deregistered
[   17.466949] xhci_hcd 0000:02:00.0: init 0000:02:00.0 fail, -110
[   17.466963] xhci_hcd: probe of 0000:02:00.0 failed with error -110
[   17.467016] xhci_hcd 0000:03:00.0: xHCI Host Controller
[   17.467020] xhci_hcd 0000:03:00.0: new USB bus registered, assigned bus number 8
[   17.467135] xhci_hcd 0000:03:00.0: hcc params 0x002841eb hci version 0x100 quirks 0x00000090
[   17.467240] usb usb8: Manufacturer: Linux 4.15.0-20-generic xhci-hcd
[   17.467405] xhci_hcd 0000:03:00.0: xHCI Host Controller
[   17.467407] xhci_hcd 0000:03:00.0: new USB bus registered, assigned bus number 9
[   17.467441] usb usb9: Manufacturer: Linux 4.15.0-20-generic xhci-hcd
[   17.800067] usb 8-1: new high-speed USB device number 2 using xhci_hcd

The problem is I want to use this controller to allocate it to a virtual machine (passtrough), but when I do this, the VM takes a while to boot and finally has the same dmesg return, so I think the problem come from here.

How can I solve this issue ?

Thank by advance for your answers :)

previously at may 2017 I have configured a virtual qemu machine with a gpu passthrought of a radeon 5450, it works fine except a kernel panic (on VM) after the 2nd boot of the VM...

Now I am trying to remake this machine with the same configuration ( just 1-2 things different) formerly :

• Gigabyte GA-990-FXA-ud3
• AMD FX6300
• 1st graphic card : NVidia GT210
• 2nd graphic card : AMD Radeon HD5450
• debian 8

changes since :

• AMD FX8350
• 1st graphic card : NVidia GT710

(I know its a little bit outdated configuration but I am not a gamer so I do not need more)

I have written this startup script :

#/bin/sh

echo '0000:02:00.1' | tee /sys/bus/pci/devices/0000:02:00.1/driver/unbind

modprobe vfio
modprobe vfio_pci

echo 1002 68f9 | sudo tee /sys/bus/pci/drivers/vfio-pci/new_id
echo 1002 aa68 | sudo tee /sys/bus/pci/drivers/vfio-pci/new_id


qemu-system-x86_64 -M q35 -m 2048 -enable-kvm \
-bios OVMF.fd \
-device ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1 \
-soundhw ac97 \
-hda virtualrawdrive -cdrom ubuntuinstall.iso \
-device piix4-ide,bus=pcie.0,id=piix4-ide  -device vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on -device vfio-pci,host=02:00.1,bus=pcie.0 \
-vnc :0

but Its not working, when I launch the script, 2nd graphic card VGA screen lights up, displays ubuntu plymouth screen, and after nothing, the screen stays on, but displays a black screen.

My lspci -nnk :

[...]
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK208B [GeForce GT 710] [10de:128b] (rev a1)
    Subsystem: Gigabyte Technology Co., Ltd GK208B [GeForce GT 710] [1458:36f7]
    Kernel driver in use: nvidia
    Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia
01:00.1 Audio device [0403]: NVIDIA Corporation GK208 HDMI/DP Audio Controller [10de:0e0f] (rev a1)
    Subsystem: Gigabyte Technology Co., Ltd GK208 HDMI/DP Audio Controller [1458:36f7]
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd_hda_intel
02:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Cedar [Radeon HD 5000/6000/7350/8350 Series] [1002:68f9]
    Subsystem: Micro-Star International Co., Ltd. [MSI] Cedar [Radeon HD 5000/6000/7350/8350 Series] [1462:2127]
    Kernel driver in use: vfio-pci
    Kernel modules: radeon
02:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Cedar HDMI Audio [Radeon HD 5400/6300/7300 Series] [1002:aa68]
    Subsystem: Micro-Star International Co., Ltd. [MSI] Cedar HDMI Audio [Radeon HD 5400/6300/7300 Series] [1462:aa68]
    Kernel driver in use: vfio-pci
    Kernel modules: snd_hda_intel
[...]

My former 2017 script :

echo '0000:02:00.1' | sudo tee /sys/bus/pci/devices/0000:02:00.1/driver/unbind

modprobe vfio
modprobe vfio_pci

echo 1002 68f9 | sudo tee /sys/bus/pci/drivers/vfio-pci/new_id
echo 1002 aa68 | sudo tee /sys/bus/pci/drivers/vfio-pci/new_id

qemu-system-x86_64 -enable-kvm -M q35 -m 2048 -cpu host -smp 2,sockets=1,cores=2,threads=1 \
-bios /usr/share/qemu/bios.bin \
-vga none -device ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1 \
-device piix4-ide,bus=pcie.0,id=piix4-ide  -device vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on -device vfio-pci,host=02:00.1,bus=pcie.0 \
-soundhw ac97 \
-drive file=/home/user/ubuntuimage,id=disk,format=raw,if=none -device ide-hd,bus=piix4-ide.0,drive=disk

I think the problem comes from the "x-vga=on" option, but it not works on the new versions, I have got this error :

qemu-system-x86_64: -device vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: vfio 0000:02:00.0: failed getting region info for VGA region index 8: Invalid argument
device does not support requested feature x-vga

I have try use a "fresh" version of qemu (4.0.0) and OVMF (compiled from the GIT sources) but It does not changes anything...

So thanks by advance for your aswers

PS : sorry for my bad english, I am french