# Newb Linux Ubuntu getting Conversion failed. The transcoder failed to start up

**URL:** <https://forums.plex.tv/t/newb-linux-ubuntu-getting-conversion-failed-the-transcoder-failed-to-start-up/936016>\
**Category:** Plex Media Server\
**Tags:** server-linux\
**Created:** [February 3, 2026, 3:52pm UTC](https://forums.plex.tv/t/newb-linux-ubuntu-getting-conversion-failed-the-transcoder-failed-to-start-up/936016 "2026-02-03T15:52:22Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![wormpower](https://avatars.discourse-cdn.com/v4/letter/w/b19c9b/32.png) [@wormpower](https://forums.plex.tv/u/wormpower)\
**Post date:** [February 3, 2026, 3:52pm UTC](https://forums.plex.tv/t/newb-linux-ubuntu-getting-conversion-failed-the-transcoder-failed-to-start-up/936016/1 "2026-02-03T15:52:22Z")

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Server Version# 1.43.0.10467  
Player Version#: 4.156.0  
\<If providing [server logs](https://support.plex.tv/articles/200250417-plex-media-server-log-files/) please do NOT turn on verbose logging, only [debug logging](https://support.plex.tv/articles/201643703-reporting-issues-with-plex-media-server/#toc-1) should be enabled\>Version

Hi,

Semi newb with Ubuntu 25.10

had to switch win 10 ☹

$900+ cpu not win 11 compatible

lol

but was working fine

now i get Conversion failed. The transcoder failed to start up.

Im guessing driver issue?

but have 580.126.09 installed running 2080 TI

Threadripper 1950X

I am at a loss, any help appreciated

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<div class="post-metadata">

**Author:** ![ChuckPa](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/chuckpa/32/79710_2.png) [@ChuckPa](https://forums.plex.tv/u/ChuckPa)\
**Post date:** [February 4, 2026, 2:30am UTC](https://forums.plex.tv/t/newb-linux-ubuntu-getting-conversion-failed-the-transcoder-failed-to-start-up/936016/2 "2026-02-04T02:30:46Z")

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Can you please provide the server DEBUG logs ZIP file which captures the attemp at playing?

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<div class="post-metadata">

**Author:** ![wormpower](https://avatars.discourse-cdn.com/v4/letter/w/b19c9b/32.png) [@wormpower](https://forums.plex.tv/u/wormpower)\
**Post date:** [February 5, 2026, 4:07pm UTC](https://forums.plex.tv/t/newb-linux-ubuntu-getting-conversion-failed-the-transcoder-failed-to-start-up/936016/3 "2026-02-05T16:07:36Z")

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[Plex Media Server Logs\_2026-02-05\_10-06-26.zip](https://forums.plex.tv/uploads/short-url/aj8evGKsJY2o1Xnys8iqIJYySgc.zip) (247.2 KB)

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<div class="post-metadata">

**Author:** ![ChuckPa](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/chuckpa/32/79710_2.png) [@ChuckPa](https://forums.plex.tv/u/ChuckPa)\
**Post date:** [February 5, 2026, 10:49pm UTC](https://forums.plex.tv/t/newb-linux-ubuntu-getting-conversion-failed-the-transcoder-failed-to-start-up/936016/4 "2026-02-05T22:49:42Z")

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There is a major configuration issue with the network adapter.

```auto
Feb 05, 2026 09:14:21.207 [135483898763920] ERROR - Error creating directory "/home/plex/Transcoder": Permission denied
Feb 05, 2026 09:14:21.215 [135483518466872] ERROR - NetworkService: Couldn't join multicast group: set_option: No such device [system:19 at /home/runner/_work/plex-media-server/plex-media-server/build/dependencies/plex-media-server/standard-x86_64-linux-musl/boost/include/boost/asio/detail/reactive_socket_service.hpp:174:33 in function 'set_option']
Feb 05, 2026 09:14:21.215 [135483518466872] ERROR - Error broadcasting message: send_to: Network unreachable [system:101 at /home/runner/_work/plex-media-server/plex-media-server/build/dependencies/plex-media-server/standard-x86_64-linux-musl/boost/include/boost/asio/detail/reactive_socket_service.hpp:261:33 in function 'send_to']
Feb 05, 2026 09:14:21.215 [135483518466872] ERROR - NetworkService: Couldn't join multicast group: set_option: No such device [system:19 at /home/runner/_work/plex-media-server/plex-media-server/build/dependencies/plex-media-server/standard-x86_64-linux-musl/boost/include/boost/asio/detail/reactive_socket_service.hpp:174:33 in function 'set_option']
Feb 05, 2026 09:14:21.215 [135483518466872] ERROR - Error broadcasting message: send_to: Network unreachable [system:101 at /home/runner/_work/plex-media-server/plex-media-server/build/dependencies/plex-media-server/standard-x86_64-linux-musl/boost/include/boost/asio/detail/reactive_socket_service.hpp:261:33 in function 'send_to']
Feb 05, 2026 09:14:21.215 [135483518466872] ERROR - NetworkService: Couldn't join multicast group: set_option: No such device [system:19 at /home/runner/_work/plex-media-server/plex-media-server/build/dependencies/plex-media-server/standard-x86_64-linux-musl/boost/include/boost/asio/detail/reactive_socket_service.hpp:174:33 in function 'set_option']
Feb 05, 2026 09:14:21.215 [135483518466872] ERROR - NetworkService: Couldn't join multicast group: set_option: No such device [system:19 at /home/runner/_work/plex-media-server/plex-media-server/build/dependencies/plex-media-server/standard-x86_64-linux-musl/boost/include/boost/asio/detail/reactive_socket_service.hpp:174:33 in function 'set_option']
Feb 05, 2026 09:14:21.215 [135483518466872] ERROR - NetworkService: Couldn't join multicast group: set_option: No such device [system:19 at /home/runner/_work/plex-media-server/plex-media-server/build/dependencies/plex-media-server/standard-x86_64-linux-musl/boost/include/boost/asio/detail/reactive_socket_service.hpp:174:33 in function 'set_option']

```

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<div class="post-metadata">

**Author:** ![wormpower](https://avatars.discourse-cdn.com/v4/letter/w/b19c9b/32.png) [@wormpower](https://forums.plex.tv/u/wormpower)\
**Post date:** [February 10, 2026, 5:45pm UTC](https://forums.plex.tv/t/newb-linux-ubuntu-getting-conversion-failed-the-transcoder-failed-to-start-up/936016/5 "2026-02-10T17:45:36Z")

</div>

fixed

reinstalled ubuntu

had swapped gpu and network

working now

Correction

Some work some dont

huge library please help

cant upload logs 8.6mb max is 8

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<div class="post-metadata">

**Author:** ![wormpower](https://avatars.discourse-cdn.com/v4/letter/w/b19c9b/32.png) [@wormpower](https://forums.plex.tv/u/wormpower)\
**Post date:** [February 12, 2026, 6:47pm UTC](https://forums.plex.tv/t/newb-linux-ubuntu-getting-conversion-failed-the-transcoder-failed-to-start-up/936016/6 "2026-02-12T18:47:19Z")

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Update

think this might be a codec issue?

files play VLC Ubuntu

but not native says missing Dolby TrueHD decoder & H.265 (Main 10 Profile) decoder

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<div class="post-metadata">

**Author:** ![FordGuy61](https://avatars.discourse-cdn.com/v4/letter/f/22d042/32.png) [@FordGuy61](https://forums.plex.tv/u/FordGuy61)\
**Post date:** [February 12, 2026, 7:19pm UTC](https://forums.plex.tv/t/newb-linux-ubuntu-getting-conversion-failed-the-transcoder-failed-to-start-up/936016/7 "2026-02-12T19:19:47Z")

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Upload a new set of [server logs](https://support.plex.tv/articles/200250417-plex-media-server-log-files/) that capture the problem.

1. Stop Plex, wait 10 seconds, start Plex
2. Wait 2 minutes for Plex to log the startup sequence
3. Recreate the problem
4. Pull & post the [server logs](https://support.plex.tv/articles/200250417-plex-media-server-log-files/)

The zip file should be small enough to upload. If not, upload `Plex Media Server.log` and its rollovers, `Plex Media Server.1.log` through `Plex Media Server.5.log`.

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<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/plex/original/3X/2/a/2acb9765406f63293d357b4ec509ec39aa28f2ad.png) [@system](https://forums.plex.tv/u/system)\
**Post date:** [May 13, 2026, 7:20pm UTC](https://forums.plex.tv/t/newb-linux-ubuntu-getting-conversion-failed-the-transcoder-failed-to-start-up/936016/8 "2026-05-13T19:20:02Z")

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