Video choppy in Fedora-26 when streaming on YouTube and Netflix

[Simon-Davies]

Qubes OS version:

Qubes 4.0 R4.0

Affected TemplateVMs:

fedora-26

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Steps to reproduce the behavior:

Enable Intel graphics due to Nvidia GTX 1050 not working with the Noveau or proprietary driver

Install rpmfusion free and nonfree repositories

Install ffmpeg

Stream YouTube or Netflix

Expected behavior:

Video isn't choppy

Actual behavior:

Video is very choppy

General notes:

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Related issues:

[andrewdavidwong]

Has it ever not been choppy on your hardware?

Also, just a shot in the dark, but does setting audio_low_latency = true in /etc/qubes/guid.conf help at all?

See: https://www.qubes-os.org/doc/config-files/

[andrewdavidwong]

Has it ever not been choppy on your hardware?

Also, just a shot in the dark, but does setting audio_low_latency = true in /etc/qubes/guid.conf help at all?

See: https://www.qubes-os.org/doc/config-files/

[Simon-Davies]

I'm running Qubes on a new Dell XPS 15 so I doubt it's a hardware issue. I wondered if it was a general Fedora issue.

I tried setting audio_low_latency = true in /etc/qubes/guid.conf but the video is still choppy unfortunately

The Noveau driver for Nvidia doesn't work with the GTX 1050 and I was unable to install the proprietary driver.

Thanks for your help :)

[Simon-Davies]

I'm running Qubes on a new Dell XPS 15 so I doubt it's a hardware issue. I wondered if it was a general Fedora issue.

I tried setting audio_low_latency = true in /etc/qubes/guid.conf but the video is still choppy unfortunately

The Noveau driver for Nvidia doesn't work with the GTX 1050 and I was unable to install the proprietary driver.

Thanks for your help :)

[martin-paulus]

Which X11 graphics driver is being used?

Example on (bare metal) Fedora 27, Dell Latitude E5530:
grep -i driver /var/log/Xorg.0.log

[..]
[     7.107] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets:
[     7.107] (II) intel: Driver for Intel(R) HD Graphics
[     7.107] (II) intel: Driver for Intel(R) Iris(TM) Graphics
[     7.107] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics
[     7.109] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20171023
[     7.119] (II) intel(0): [DRI2]   DRI driver: i965
[     7.119] (II) intel(0): [DRI2]   VDPAU driver: va_gl
[..]

So, I am using the i915 intel driver. But I am pretty sure that vesa or fbdev drivers would also "work", albeit with lesser performance.

[martin-paulus]

Which X11 graphics driver is being used?

Example on (bare metal) Fedora 27, Dell Latitude E5530:
grep -i driver /var/log/Xorg.0.log

[..]
[     7.107] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets:
[     7.107] (II) intel: Driver for Intel(R) HD Graphics
[     7.107] (II) intel: Driver for Intel(R) Iris(TM) Graphics
[     7.107] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics
[     7.109] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20171023
[     7.119] (II) intel(0): [DRI2]   DRI driver: i965
[     7.119] (II) intel(0): [DRI2]   VDPAU driver: va_gl
[..]

So, I am using the i915 intel driver. But I am pretty sure that vesa or fbdev drivers would also "work", albeit with lesser performance.

[feosam]

When I watch a video and I move with the cursor the video jerkys. If it is a fast Video (for example a car video or a youtube video with 720p) it jerkys also whitout moving the cursor. I didn't have this problem at os 3.2 - even when I was playing videos simultaneously.

I looked at the qubes os homepage for a solution:

https://www.qubes-os.org/doc/intel-igfx-troubleshooting/

The solution would be to add a line (iommu=no-igfx) to the /boot/efi/EFI/qubes/xen.cfg .

This line (iommu=no-igfx) was already in the .cfg file, so I had nothing to add.

I tried also debian 9 - the same problem.

Regards

[feosam]

When I watch a video and I move with the cursor the video jerkys. If it is a fast Video (for example a car video or a youtube video with 720p) it jerkys also whitout moving the cursor. I didn't have this problem at os 3.2 - even when I was playing videos simultaneously.

I looked at the qubes os homepage for a solution:

https://www.qubes-os.org/doc/intel-igfx-troubleshooting/

The solution would be to add a line (iommu=no-igfx) to the /boot/efi/EFI/qubes/xen.cfg .

This line (iommu=no-igfx) was already in the .cfg file, so I had nothing to add.

I tried also debian 9 - the same problem.

Regards

[awokd]

From a suggestion in the mailing list, could you please try "turning off the Intel speed stepping" in your UEFI configuration?

[awokd]

From a suggestion in the mailing list, could you please try "turning off the Intel speed stepping" in your UEFI configuration?

[feosam]

There is no configuration for Intel speed step or EIST in the uefi bios.

[feosam]

There is no configuration for Intel speed step or EIST in the uefi bios.

[Simon-Davies]

I turned off Intel Speed Stepping in my Bios but still have the issue.

[Simon-Davies]

I turned off Intel Speed Stepping in my Bios but still have the issue.