Fairlight shows a black hole

I installed DR 16.2.3 on Linux-CentOS 8.2., and generally all went fine. But I have problems working in the FAIRLIGHT-section. The sequence-window of the Fairlight-Section doesn't show no video-tracks and no audio-tracks. There is only a black wall, it is as if a black mask is laying over the sequence-window. I cannot see nothing, no tracks, neither the structure of the sequence-window as it is usual. I don't understand this phenomena and have no idea to solve this problem. In the moment it is impossible to work.
Thanks for any help
blaselteso
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My System: Linux-CentOS 8.2., Davinci Resolve Studio 16.2.2.3 , Desktop-PC: Motherboard AMD-B450M-Pro-M2-V2; CPU: AMD AM4 Ryzen 7 2700 8x; GPU: AMD Radeon RX 580; GPU-Driver: amdgpu-proRAM: 16 GB;

What happens if you switch the dual screen mode on and off?

There is no dual screen mode in the fairlight section. I have the suspicion that there is something vital wrong with the audio-interaction between the Linux-System CentOS 8), DR and the fairlight section. From systems side I get the information that there is a "Alsa-Plugin (resolve)" working to use my external Rode microphone. That sounsd good but in fact there is no possibility for audio recording. Nothing to see in the sequence-window of fairlight (also the viewer of the "meters-panel" is lost and I have no idea how to restore it) and there is nothing to hear after running a recording test. At last is this system unsuable for me. Very unhappy.

Best wishes
balselteso

Oh but there is dual screen mode for the Fairlight page. Only the Cut and Deliver pages are single screen only.

And this is the single screen mode for the Fairlight page. Mixer and Meters are selected top right.

[Dwaine Maggart]

Send a screen shot of what it looks like, along with a Resolve diagnostics log file.

Thank you Charles, but as you can see in the screenshot #1 the possibility to switch into the dual-screen mode seems to be deactivated, namely under Linux AND under windows.

@Dwain: which kind of diagnostic-log-file do you mean? There are several under
/home/alex/.local/share/DaVinciResolve/log

Best
blaselteso

And here is a screeshot how looks the fairlight window under Linux. It seems, that the fairlight-component is complete out of order. Don't know.

Best

blaselteso

[Dwaine Maggart]

A Resolve diagnostics log created with the Resolve Help menu: Create Diagnostics Log on Desktop.

Dear Dwain,

ok, I am sending the archive (I don't know which file will give the most information for you ).
Best wishes

blaselteso

[Dwaine Maggart]

I don't see any XORG info in the logs. I think I recall seeing CentOS 8 uses a different display manager? Maybe related to that.

The log says the main display is not connected to the external GPU. Do you have the display connected to the RX580, or is there some sort of onboard graphics you have that connected to? If so, connect the display to the RX580 and see what that does.

Thanks Dwaine,

yes the display is connected with the RX 580. But Centos 8 is using Wayland instead of Xorg. If that is a problem I think I can change it back to xorg.

Best wishes

blaselteso

I have been running into the exact same problem on my system. I am running Studio and wanted to give the Linux version a try. I am also using a AMD gpu, but I am using Ubuntu instead of Centos.

Everything works great, but Fairlight also hides the audio tracks on my system. I found out that if I click and drag one them, I can briefly see it while my right click is down and dragging. Could it be a problem with the color theme?

Did anybody find a solution for this problem in the meantime? In this case, please post it here. I am struggeling still with this problem. It is definitely not a question of wayland or xorg. I have changed it to xorg. All other components of Davinci-Resolve are running fine, except FAIRLIGHT. Inside the Edit-Window I see clear all video- and audio-tracks. I can manipulate the Audio and everything I want to do. Inside the FAIRLIGHT-window I can hear the sound and the mixer shows the audio-output-level. But I cannot see any track. No audio and no video-track. But they must be there, because with a right click in the »black hole« - if lucky - for a very short moment I can see a trimm-curser, nothing else. Right or left, this is accidental because I have no possibilty to control it.

And another phenomena is: if I want to record audio, the system do not recognize my external microphone, so I cannot patch Input/Output. I can only choose the Audio-Input between »1: ALSA« and »2: ALSA«. My Roede-Micro is not displayed.

Can it be a question of ALSA-configuration? Or audio.i/o-configuration? Or can it be a bug? And in this case, do the DR-Team of BM know of it?

Best wishes

blaselteso

[Dwaine Maggart]

Audio recording with external devices is a known Linux issue.

Audio recording with external devices is a known Linux issue.

Hmm, dear Dwaine, I would say it is not an Linux issue because with other programs I have no problems with external audio devices on Linux (e.g. Audacity or any video conferencing tool). Insofar it seems to be more a Fairlight-issue (on Linux). And I would be very glad, if it could be solved in one of the next Resolve-upgrades. I am using the studio-version.

Best wishes

blaselteso

[Dwaine Maggart]

OK, let me be more precise: audio recording with external devices using Resolve on Linux is a known issue. This includes ADR recording.

A Resolve diagnostics log created with the Resolve Help menu: Create Diagnostics Log on Desktop.

Same here. I have a black hole in the Fairlight page exactly as on the screenshot of blaselteso. The same happens if i activate dual screen. (All the other pages of the Resolve seem to run relatively fine.)

Also it seems there are waveform blocks in this black hole, as I can drag and drop those (and they appear while being dragged). Furthermore, the fade cursors appear when I hover on the waveform blocks.

I am running DR16.2.7.010 on Xorg/Fedora 33/kernel 5.8.18-300 on a Threadripper 3960X with the AMDGPU-PRO driver on an RX 5700.

Dwaine, I attached a diagnostic log from DR too.

I am considering buying DR17, so I am trying DR16 because DR17b1 doesn't even show its splash screen. I am hoping these issues are fixed before the end of the Speed Editor discount, i.e. by the 31 of December...

[Dwaine Maggart]

We only support RHEL/CentOS 7.x.

I would suggest you post your issue in the big Linux thread and see if any Fedora users have suggestions:

viewtopic.php?f=21&t=56878

We only support RHEL/CentOS 7.x.

I would suggest you post your issue in the big Linux thread and see if any Fedora users have suggestions:

viewtopic.php?f=21&t=56878

Hi Dwaine,

OK, thanks for the tip. I'll try the big Linux thread.

That's a pity though. CentOS 7 is so old that you don't have good recent hardware support and applications...

By the way, I asked in a bug report for DR17b1, but had no answer yet. Is there a DR17b1/CentOS 7 ISO that one can test ? I can't seem to find it anywhere.

Thanks for your help.
Regards,
Didier

[Dwaine Maggart]

There is no new build ISO. It's the same CentOS 7.3 / Resolve 16.0 ISO we've had since Resolve 16.0.

Link to the ISO is at the end of the Linux Installation Instructions PDF that is included with each Resolve Linux release download.

https://downloads.blackmagicdesign.com/ ... OS_7.3.iso

There is no new build ISO. It's the same CentOS 7.3 / Resolve 16.0 ISO we've had since Resolve 16.0.

OK. So if I understand correctly, I can install the DaVinciResolve16/CentOS7.3 ISO and install DaVinci 17b1 over it, right ?

[Dwaine Maggart]

If you can get 16 working with the ISO install, then 17 will work as well, as long as you update the NVIDIA driver to 450.66 or higher.

The NVIDIA driver on the ISO image is too old for Resolve 16.2.7 or 17.

Note that you MUST burn the ISO to a DVD and do the install process from a DVD drive.

No, you CAN"T dd or use some other method to put the ISO image on a USB stick. The installer will fail if you run it from a USB stick.

Also, there must be no onboard graphics on the motherboard, or if there is, it must be disabled, or the ISO install process will fail.

With all these caveats, it's probably better for personal users to use the Seth Goldin install instructions:

https://github.com/sethgoldin/install-d ... lve-centos

Thank you Seth!

He gives you a process for either CentOS 7.8 or 8.2. I'd probably recommend going with 7.8.

Thanks a lot Dwaine for these detailed explanations.

Yeah, the DVD makes it pretty unusable on any modern system, as you can't anymore find a system with a DVD reader. So I'll look into Seth's install instructions.

Sorry, but just a last question. You often mention Nvidia, but are the AMDGPU-PRO drivers correctly supported by DaVinci Resolve Studio on CentOS 7 ? I've seen you don't support GPU-accelerated h264/h265 encode/decode (and that's a pitty but OK), but is the application stable with AMD GPUs ?

[Dwaine Maggart]

People have apparently gotten AMD GPU's to work in Linux.

Our ISO build is NVIDIA focused, and I have no guidance for getting AMD working on Linux.

In general, it seems more than a trivial task.

[Dwaine Maggart]

The issue of the tracks area on the Fairlight page being a "black hole" with an AMD GPU should be solved with the just released 17.1.1 version.

The issue of the tracks area on the Fairlight page being a "black hole" with an AMD GPU should be solved with the just released 17.1.1 version.

Yes, indeed, it is solved. Thanks for that.
But the other Fairlight-problem, not recognizing the external USB-Microphone (in my case a Roede-NT-USB) is still alive.

If i try to patch Audio-Input/Output the source is only shown as »1: ALSA« and »2: ALSA«, the micro itself is not displayed.
The Linux-systems-settings (Linux Centos 8) show that »ALSA-Plugin« is »on« and used by »Resolve«. But Resolve doesn't recognize the micro.

Has anybody a solution or a workaround about this?

Best wishes

blaselteso

[Dwaine Maggart]

Right. Still no ADR support in the Linux version of Resolve.