Carla: Error ALSA Carla 0.9.9

Created on 5 May 2020  路  25Comments  路  Source: carla-simulator/carla

Trying to run Carla 0.9.9 in Google Cloud Engine with command

DISPLAY= ./CarlaUE4.sh -opengl

and receiving

4.24.3-0+++UE4+Release-4.24 518 0
Disabling core dumps.
ALSA lib confmisc.c:767:(parse_card) cannot find card '0'
ALSA lib conf.c:4528:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4528:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name
ALSA lib conf.c:4528:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5007:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM default
ALSA lib confmisc.c:767:(parse_card) cannot find card '0'
ALSA lib conf.c:4528:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4528:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name
ALSA lib conf.c:4528:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5007:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM default

and when closing with ctrl+c

^CFUnixPlatformMisc::RequestExitWithStatus
FUnixPlatformMisc::RequestExit
Exiting abnormally (error code: 130)

it's a error of missing library or something else ?

picture wendersonj

Most helpful comment

solved with the help of
https://medium.com/@etendue2013/how-to-run-ai2-thor-simulation-fast-with-google-cloud-platform-gcp-c9fcde213a4a

The workaround to prohibit the above message is to create a file /etc/asound.conf with the following content. A detailed explanation may be found in this link.

pcm.!default { type plug slave.pcm "null" }

picture wendersonj on 5 May 2020
👍2

All 25 comments

Just installed library alsa-utils but error persists.

wendersonj picture wendersonj on 5 May 2020

solved with the help of
https://medium.com/@etendue2013/how-to-run-ai2-thor-simulation-fast-with-google-cloud-platform-gcp-c9fcde213a4a

The workaround to prohibit the above message is to create a file /etc/asound.conf with the following content. A detailed explanation may be found in this link.

pcm.!default { type plug slave.pcm "null" }

wendersonj picture wendersonj on 5 May 2020
👍2

Just installed library alsa-utils but error persists.

Hi, i am also using Carla 0.9.9 on GCP, do i need insta lllibrary alsa-utils before i follow the medium's method? thks

zhukevin04 picture zhukevin04 on 7 Aug 2020

Just installed library alsa-utils but error persists.

Hi, i am also using Carla 0.9.9 on GCP, do i need insta lllibrary alsa-utils before i follow the medium's method? thks

I can't say if It will work without install alsa-utils, but I did installed and created the file with the content from the previous message. That said, I suggest you create the file (without the alsa-utils) , try to run Carla and post for us your results, if you succeed or not.

wendersonj picture wendersonj on 7 Aug 2020

Just installed library alsa-utils but error persists.

Hi, i am also using Carla 0.9.9 on GCP, do i need insta lllibrary alsa-utils before i follow the medium's method? thks

I can't say if It will work without install alsa-utils, but I did installed and created the file with the content from the previous message. That said, I suggest you create the file (without the alsa-utils) , try to run Carla and post for us your results, if you succeed or not.

i add pcm.!default { type plug slave.pcm "null" } to asound.conf to prohibit the ALSA lib message, but the Xorg Dispaly still some problem, and can't the examples in PythonAPI. Did you success run the examples on GCP?

zhukevin04 picture zhukevin04 on 7 Aug 2020

Yes. After this problem, everything went fine. Right now I'm creating a new project to restart my tests with my code for Carla in GCP. If you installed the nvidia's drivers correctly (check it !), you shouldn't have problems... I suggest that you search for you problem here in the github (it can be something else) and if you don't find it, create a topic.
cheers!

wendersonj picture wendersonj on 7 Aug 2020
👍1

Yes. After this problem, everything went fine. Right now I'm creating a new project to restart my tests with my code for Carla in GCP. If you installed the nvidia's drivers correctly (check it !), you shouldn't have problems... I suggest that you search for you problem here in the github (it can be something else) and if you don't find it, create a topic.
cheers!

Aha, so you mean you can see the UE4 window? or just run the program, i want to the UE4 window on GCP through Xorg. Thks!

When i launch Xorg, there is an error (EE) Fatal server error (EE) no screens found
Then i use P100 with CUDA10.2 and nvidia-smi works.

zhukevin04 picture zhukevin04 on 9 Aug 2020

Yes. After this problem, everything went fine. Right now I'm creating a new project to restart my tests with my code for Carla in GCP. If you installed the nvidia's drivers correctly (check it !), you shouldn't have problems... I suggest that you search for you problem here in the github (it can be something else) and if you don't find it, create a topic.
cheers!

Aha, so you mean you can see the UE4 window? or just run the program, i want to the UE4 window on GCP through Xorg. Thks!

When i launch Xorg, there is an error (EE) Fatal server error (EE) no screens found
Then i use P100 with CUDA10.2 and nvidia-smi works.

Hi ! I don't if I understood correctly your question ... BUT:

I can't see any graphic interface, only information from the terminal (text). I think there is a way, using different remote access with, but I never used or have more information). I don't launch Xorg, just run Carla and my scripts.

Ps: Nvidia's drivers are important to run the server and won't work without them.

wendersonj picture wendersonj on 9 Aug 2020

Yes. After this problem, everything went fine. Right now I'm creating a new project to restart my tests with my code for Carla in GCP. If you installed the nvidia's drivers correctly (check it !), you shouldn't have problems... I suggest that you search for you problem here in the github (it can be something else) and if you don't find it, create a topic.
cheers!

Aha, so you mean you can see the UE4 window? or just run the program, i want to the UE4 window on GCP through Xorg. Thks!
When i launch Xorg, there is an error (EE) Fatal server error (EE) no screens found
Then i use P100 with CUDA10.2 and nvidia-smi works.

Hi ! I don't if I understood correctly your question ... BUT:

I can't see any graphic interface, only information from the terminal (text). I think there is a way, using different remote access with, but I never used or have more information). I don't launch Xorg, just run Carla and my scripts.

Ps: Nvidia's drivers are important to run the server and won't work without them.

Hi, i understand that! Thanks! I try to see the graphic interface but still some errors, i am still trying to solve it, if success i will come back.

zhukevin04 picture zhukevin04 on 9 Aug 2020

It is puzzling how this appears in CARLA 0.9.8 when built from source with make package, but not in the official CARLA 0.9.8 docker image...

Update: The addition of the previously mentioned file fixes the problem in the Ubuntu 18.04 host. The docker image doesn't have it:

$ docker run --rm carlasim/carla:0.9.8 cat /etc/asound.conf
cat: /etc/asound.conf: No such file or directory
qhaas picture qhaas on 25 Nov 2020

Probably the ubuntu image from docker already was configured and your computer it's not.

wendersonj picture wendersonj on 25 Nov 2020

I understand that adding pcm.!default { type plug slave.pcm "null" } to /etc/asound.conf should solve the problem, but I am a little confused because no such directory exists in my Carla installation. Do I need to create it, and if so where? Thanks!

Stephanehk picture Stephanehk on 5 Dec 2020

I understand that adding pcm.!default { type plug slave.pcm "null" } to /etc/asound.conf should solve the problem, but I am a little confused because no such directory exists in my Carla installation. Do I need to create it, and if so where? Thanks!

@Stephanehk I don't understand what you mean by doesn't exist in your Carla installation, because the file asound.conf is part of the file system /etc/. In fact, it's a library. If it doesn't exist, you should install the library alsa-utils, as I said previously. For further explanation of why make that change in the file check it out: https://medium.com/@etendue2013/how-to-run-ai2-thor-simulation-fast-with-google-cloud-platform-gcp-c9fcde213a4a.

Cheers.

wendersonj picture wendersonj on 5 Dec 2020

@wendersonj Is this necessary to start the Carla server? I get the above error messages and my server does not run, but I am not sure if it's a problem with Alsa or if something else is going on.

Stephanehk picture Stephanehk on 5 Dec 2020

Nop. You should know if it's a alsa problem if it shows up any message about alsa or related... In case you are no able to start your server, you should look up what it is in your log and search for more information here on issue's github from Carla.

wendersonj picture wendersonj on 6 Dec 2020

@wendersonj I ask this because I get the error messages above and then nothing happens, Carla just hangs. Because no other error messages are printed (even though Carla does not terminate), I am unsure if the server is not starting because of Alsa. Do you have any ideas?

Stephanehk picture Stephanehk on 6 Dec 2020

You should post a print for your terminal.

wendersonj picture wendersonj on 6 Dec 2020

@wendersonj My terminal displays exactly the same error message you had:

4.24.3-0+++UE4+Release-4.24 518 0
Disabling core dumps.
ALSA lib confmisc.c:767:(parse_card) cannot find card '0'
ALSA lib conf.c:4528:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4528:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name
ALSA lib conf.c:4528:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5007:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM default
ALSA lib confmisc.c:767:(parse_card) cannot find card '0'
ALSA lib conf.c:4528:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4528:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name
ALSA lib conf.c:4528:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5007:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM default
Stephanehk picture Stephanehk on 6 Dec 2020

I understand that adding pcm.!default { type plug slave.pcm "null" } to /etc/asound.conf should solve the problem, but I am a little confused because no such directory exists in my Carla installation. Do I need to create it, and if so where? Thanks!

When you said that you didn't have the folder, did you install alsa after ? After installing alsa, you should do the changes on the file .. Have you done it?

solved with the help of
https://medium.com/@etendue2013/how-to-run-ai2-thor-simulation-fast-with-google-cloud-platform-gcp-c9fcde213a4a

The workaround to prohibit the above message is to create a file /etc/asound.conf with the following content. A detailed explanation may be found in this link.

pcm.!default { type plug slave.pcm "null" }

wendersonj picture wendersonj on 6 Dec 2020

@wendersonj I was trying to avoid installing Alsa because I do not have root privileges, however, if that is the only way to resolve the issue I will give it a shot. Thanks!

Stephanehk picture Stephanehk on 6 Dec 2020

okay ! I don't know any workaround without installing, but try install it ... or if you find any other way, post here !

cheers

wendersonj picture wendersonj on 6 Dec 2020

@wendersonj First off I believe I found a better way to do this. I simply created a file entitled .asoundrc in my home directory and copy and pasted pcm.!default { type plug slave.pcm "null" } into this file (more details here). I now however still have the error
xcb_connection_has_error() returned true Failed to create secure directory (/run/user/40445/pulse): No such file or directory

which seems to have to do with the Pulse audio library. Do you have any ideas or does this warrant a new issue?

Stephanehk picture Stephanehk on 7 Dec 2020

@Stephanehk Great ! Thanks for share your workaround. But, this probably it's a new error and I don't have ideas... A quickly search on google, I found this: https://unix.stackexchange.com/questions/320809/audio-not-working-on-debian-jessie. Not sure if will help you. Sorry.
Have you tried to connect to CARLA, even with this error/warning message ?

wendersonj picture wendersonj on 7 Dec 2020

@wendersonj yeah, the CARLA server just hangs as yours did originally. I still don't understand why because I would not think audio is necessary for it to run.

Stephanehk picture Stephanehk on 7 Dec 2020

I think that there was a parameter -no-sound, but I don't know if it works...

wendersonj picture wendersonj on 10 Dec 2020
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