Problems with movie playback [Solved]

[django013]

Whenever I have vlc playback issues mpv works fine. But that's when vlc won't play it at all.

Same hiccup with mpv - no difference

Today's update of multimedia libraries has made problems even worse. The hiccups now last more than twice as long as yesterday.

[siamhie]

Hi,

... have you tried a different compositor? Wayland still has issues iin bookworm.

while searching for the qsi problem i discovered that no matter which compositor i choose the qsi report always says xwayland.

I changed compositor at KDE settings at workspace -> startoptions -> autostart - session
I can choose between X11 and Wayland, but changing the value does not change qsi-compositor output.

Code: Select all

Display: server: X.org v: 1.21.1.7 with: Xwayland v: 22.1.9 compositor: kwin_x11 driver: X:
    loaded: nvidia gpu: nvidia tty: 118x29

The value for Display: is missing. It should report either x11 or wayland.
It will always report with: Xwayland


I'm booted to fluxbox currently but let me boot over to KDE to show you what mine reports.


Addendum:

Code: Select all

x11 session:

Display: x11 server: X.Org v: 1.21.1.7 with: Xwayland v: 22.1.9 compositor: kwin_x11 driver: X:
    loaded: amdgpu unloaded: fbdev,modesetting,radeon,vesa dri: radeonsi gpu: amdgpu display-ID: :0
    


wayland session:

Display: wayland server: X.org v: 1.21.1.7 with: Xwayland v: 22.1.9 compositor: kwin_wayland
    driver: X: loaded: amdgpu unloaded: fbdev,modesetting,radeon,vesa dri: radeonsi gpu: amdgpu
    display-ID: 0

[Kermit the Frog]

Another example from another thread (KDE again):

Code: Select all

  Display: x11 server: X.Org v: 1.21.1.7 compositor: kwin_x11 driver: X: loaded: nvidia
    unloaded: fbdev,modesetting,nouveau,vesa alternate: nv gpu: nvidia display-ID: :0 screens: 1

This time nothing like " with: Xwayland v: xx.x.x " ..

Maybe you need to change it on login screen.

[siamhie]

Another example from another thread (KDE again):

Code: Select all

  Display: x11 server: X.Org v: 1.21.1.7 compositor: kwin_x11 driver: X: loaded: nvidia
    unloaded: fbdev,modesetting,nouveau,vesa alternate: nv gpu: nvidia display-ID: :0 screens: 1

This time nothing like " with: Xwayland v: xx.x.x " ..

Maybe you need to change it on login screen.

That user most likely removed the xwayland package. Notice that they are using the x11 session (Display:).

Code: Select all

apt-cache show xwayland
Package: xwayland
Version: 2:22.1.9-1
Installed-Size: 2340
Maintainer: Debian X Strike Force <debian-x@lists.debian.org>
Architecture: amd64
Depends: xserver-common, libc6 (>= 2.36), libdrm2 (>= 2.4.75), libepoxy0 (>= 1.5.4), libgbm1 (>= 17.1.0~rc2), 
libgcrypt20 (>= 1.10.0), libgl1, libpixman-1-0 (>= 0.30.0), libtirpc3 (>= 1.0.2), libwayland-client0 (>= 1.20.0), 
libxau6 (>= 1:1.0.9), libxcvt0 (>= 0.1.0), libxdmcp6, libxfont2 (>= 1:2.0.1), libxshmfence1
Description-en: X server for running X clients under Wayland
 This package provides an X server running on top of wayland, using wayland
 input devices for input and forwarding either the root window or individual
 top-level windows as wayland surfaces.
Description-md5: 46119f00e9401992b76d381dca9d3438
Homepage: https://www.x.org/
Section: x11
Priority: optional
Filename: pool/main/x/xwayland/xwayland_22.1.9-1_amd64.deb
Size: 870072
MD5sum: 400d09df54ed90be9facd01895fb3f22
SHA256: ab9234a54433c69593983ffdcd92bfe4882ff0a6302fcc1e64607da35682c631

OP doesn't show which session they are using. x11 or wayland.

[django013]

OK, I purged xwayland package.
hiccups remain the same.

updated system info:

Code: Select all

System:
  Kernel: 6.11.3-1-liquorix-amd64 [6.11-3~mx23ahs] arch: x86_64 bits: 64 compiler: gcc v: 12.2.0 parameters: audit=0
    intel_pstate=disable BOOT_IMAGE=/boot/vmlinuz-6.11.3-1-liquorix-amd64 root=UUID=<filter> ro
    quiet splash
  Desktop: KDE Plasma v: 5.27.5 wm: kwin_x11 vt: 7 dm: SDDM Distro: MX-23.4_KDE_x64 Libretto
    October 15 2023 base: Debian GNU/Linux 12 (bookworm)
Machine:
  Type: Desktop Mobo: ASUSTeK model: PRIME A320M-K v: Rev X.0x serial: <superuser required>
    UEFI: American Megatrends v: 6062 date: 02/24/2023
CPU:
  Info: model: AMD Ryzen 5 3600 bits: 64 type: MT MCP arch: Zen 2 gen: 3 level: v3 note: check
    built: 2020-22 process: TSMC n7 (7nm) family: 0x17 (23) model-id: 0x71 (113) stepping: 0
    microcode: 0x8701030
  Topology: cpus: 1x cores: 6 tpc: 2 threads: 12 smt: enabled cache: L1: 384 KiB
    desc: d-6x32 KiB; i-6x32 KiB L2: 3 MiB desc: 6x512 KiB L3: 32 MiB desc: 2x16 MiB
  Speed (MHz): avg: 1048 high: 3600 min/max: 550/4208 boost: enabled scaling:
    driver: amd-pstate-epp governor: performance cores: 1: 3600 2: 550 3: 550 4: 550 5: 550 6: 3486
    7: 550 8: 550 9: 550 10: 550 11: 550 12: 550 bogomips: 86240
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3
  Vulnerabilities:
  Type: gather_data_sampling status: Not affected
  Type: itlb_multihit status: Not affected
  Type: l1tf status: Not affected
  Type: mds status: Not affected
  Type: meltdown status: Not affected
  Type: mmio_stale_data status: Not affected
  Type: reg_file_data_sampling status: Not affected
  Type: retbleed mitigation: untrained return thunk; SMT enabled with STIBP protection
  Type: spec_rstack_overflow mitigation: Safe RET
  Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via prctl
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization
  Type: spectre_v2 mitigation: Retpolines; IBPB: conditional; STIBP: always-on; RSB filling;
    PBRSB-eIBRS: Not affected; BHI: Not affected
  Type: srbds status: Not affected
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: NVIDIA GP107GL [Quadro P400] driver: nvidia v: 535.183.06 non-free: 530.xx+
    status: current (as of 2023-03) arch: Pascal code: GP10x process: TSMC 16nm built: 2016-21 pcie:
    gen: 3 speed: 8 GT/s lanes: 16 bus-ID: 08:00.0 chip-ID: 10de:1cb3 class-ID: 0300
  Display: x11 server: X.Org v: 1.21.1.7 compositor: kwin_x11 driver: X: loaded: nvidia
    gpu: nvidia display-ID: :0 screens: 1
  Screen-1: 0 s-res: 1920x1200 s-dpi: 75 s-size: 649x406mm (25.55x15.98") s-diag: 766mm (30.14")
  Monitor-1: DP-3 pos: primary res: 1920x1080 hz: 60 size: N/A modes: N/A
  Monitor-2: DP-5 res: 1920x1200 hz: 60 size: N/A modes: N/A
  API: OpenGL v: 4.6.0 NVIDIA 535.183.06 renderer: Quadro P400/PCIe/SSE2 direct-render: Yes
Audio:
  Device-1: NVIDIA GP107GL High Definition Audio driver: snd_hda_intel v: kernel pcie: gen: 3
    speed: 8 GT/s lanes: 16 bus-ID: 08:00.1 chip-ID: 10de:0fb9 class-ID: 0403
  Device-2: AMD Starship/Matisse HD Audio vendor: ASUSTeK driver: snd_hda_intel v: kernel pcie:
    gen: 4 speed: 16 GT/s lanes: 16 bus-ID: 0a:00.4 chip-ID: 1022:1487 class-ID: 0403
  API: ALSA v: k6.11.3-1-liquorix-amd64 status: kernel-api tools: alsamixer,amixer
  Server-1: PipeWire v: 1.0.0 status: active with: 1: pipewire-pulse status: active
    2: wireplumber status: active 3: pipewire-alsa type: plugin 4: pw-jack type: plugin
    tools: pactl,pw-cat,pw-cli,wpctl
Network:
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: ASUSTeK PRIME B450M-A
    driver: r8169 v: kernel pcie: gen: 1 speed: 2.5 GT/s lanes: 1 port: f000 bus-ID: 06:00.0
    chip-ID: 10ec:8168 class-ID: 0200
  IF: eth0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives:
  Local Storage: total: 959.47 GiB used: 11.22 GiB (1.2%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Crucial model: CT1000P3SSD8 size: 931.51 GiB
    block-size: physical: 512 B logical: 512 B speed: 31.6 Gb/s lanes: 4 type: SSD serial: <filter>
    rev: P9CR30A temp: 30.9 C scheme: GPT
  ID-2: /dev/sda maj-min: 8:0 vendor: Kingston model: SS200S330G size: 27.96 GiB block-size:
    physical: 512 B logical: 512 B speed: 6.0 Gb/s type: SSD serial: <filter> rev: 05.1 scheme: GPT
Partition:
  ID-1: / raw-size: 186.26 GiB size: 186.26 GiB (100.00%) used: 11.21 GiB (6.0%) fs: btrfs
    dev: /dev/nvme0n1p3 maj-min: 259:3
  ID-2: /boot/efi raw-size: 95 MiB size: 93.5 MiB (98.44%) used: 12 MiB (12.9%) fs: vfat
    dev: /dev/nvme0n1p5 maj-min: 259:5
Swap:
  Alert: No swap data was found.
Sensors:
  System Temperatures: cpu: 36.8 C mobo: N/A gpu: nvidia temp: 36 C
  Fan Speeds (RPM): N/A gpu: nvidia fan: 34%
Repos:
  Packages: pm: dpkg pkgs: 2678 libs: 1455 tools: apt,apt-get,aptitude,nala pm: rpm pkgs: 0
    pm: flatpak pkgs: 0
  No active apt repos in: /etc/apt/sources.list
  Active apt repos in: /etc/apt/sources.list.d/brave-browser-release.list
    1: deb [signed-by=/usr/share/keyrings/brave-browser-archive-keyring.gpg] https://brave-browser-apt-release.s3.brave.com/ stable main
  Active apt repos in: /etc/apt/sources.list.d/debian-stable-updates.list
    1: deb http://deb.debian.org/debian bookworm-updates main contrib non-free non-free-firmware
  Active apt repos in: /etc/apt/sources.list.d/debian.list
    1: deb http://deb.debian.org/debian bookworm main contrib non-free non-free-firmware
    2: deb http://security.debian.org/debian-security bookworm-security main contrib non-free non-free-firmware
  Active apt repos in: /etc/apt/sources.list.d/mx.list
    1: deb http://ftp.halifax.rwth-aachen.de/mxlinux/packages/mx/repo/ bookworm main non-free
  Active apt repos in: /etc/apt/sources.list.d/signal-xenial.list
    1: deb [arch=amd64 signed-by=/usr/share/keyrings/signal-desktop-keyring.gpg] https://updates.signal.org/desktop/apt xenial main
Info:
  Processes: 321 Uptime: 0m wakeups: 1 Memory: 15.53 GiB used: 1.47 GiB (9.5%) Init: SysVinit
  v: 3.06 runlevel: 5 default: graphical tool: systemctl Compilers: gcc: 12.2.0 alt: 12
  Client: shell wrapper v: 5.2.15-release inxi: 3.3.26
Boot Mode: UEFI

[siamhie]

Perhaps my particular hardware-setup has something to do with the problem.
I use two different ports on the graphics card:

• the beamer is connected to one
• the AV amplifier to another.

In KDE, I have configured the screen of the amplifier as a copy of the screen of the projector.

Could you explain this setup a little more.
Which connectors are you using from the graphics cards? Is it going to a computer monitor (multiple?)
What's a beamer?
AV amplifier?

[siamhie]

Another example from another thread (KDE again):

Code: Select all

  Display: x11 server: X.Org v: 1.21.1.7 compositor: kwin_x11 driver: X: loaded: nvidia
    unloaded: fbdev,modesetting,nouveau,vesa alternate: nv gpu: nvidia display-ID: :0 screens: 1

This time nothing like " with: Xwayland v: xx.x.x " ..

Maybe you need to change it on login screen.

@Kermit the Frog So I tested my theory and removed the xwayland package
and now KDE doesn't have the ability to use the wayland desktop session at the log in screen.


Here's the QSI from it. Notice the lack of "with: Xwayland" in the Display section.

Code: Select all

Snapshot created on: 20241115_1400
System:
  Kernel: 6.12.6-1-liquorix-amd64 [6.12-7~mx23ahs] arch: x86_64 bits: 64 compiler: gcc v: 12.2.0 parameters: audit=0
    intel_pstate=disable amd_pstate=disable BOOT_IMAGE=/boot/vmlinuz-6.12.6-1-liquorix-amd64
    root=UUID=<filter> ro quiet splash init=/lib/systemd/systemd
  Desktop: KDE Plasma v: 5.27.5 tk: Qt v: 5.15.8 wm: kwin_x11 vt: 7 dm: LightDM v: 1.26.0
    Distro: MX-23.4_x64 Libretto November 15 2024 base: Debian GNU/Linux 12 (bookworm)
Machine:
  Type: Desktop Mobo: Micro-Star model: B550-A PRO (MS-7C56) v: 2.0 serial: <superuser required>
    UEFI: American Megatrends LLC. v: A.F0 date: 10/11/2023
CPU:
  Info: model: AMD Ryzen 9 5950X bits: 64 type: MT MCP arch: Zen 3+ gen: 4 level: v3 note: check
    built: 2022 process: TSMC n6 (7nm) family: 0x19 (25) model-id: 0x21 (33) stepping: 2
    microcode: 0xA20120E
  Topology: cpus: 1x cores: 16 tpc: 2 threads: 32 smt: enabled cache: L1: 1024 KiB desc: d-16x32
    KiB; i-16x32 KiB L2: 8 MiB desc: 16x512 KiB L3: 64 MiB desc: 2x32 MiB
  Speed (MHz): avg: 2358 high: 3400 min/max: 2200/5083 boost: disabled scaling:
    driver: acpi-cpufreq governor: ondemand cores: 1: 2720 2: 2800 3: 2200 4: 2715 5: 2200 6: 2200
    7: 3400 8: 2200 9: 2720 10: 2200 11: 2200 12: 2200 13: 2200 14: 2200 15: 2200 16: 3400 17: 2200
    18: 2200 19: 2717 20: 2200 21: 2200 22: 2200 23: 2200 24: 2200 25: 2200 26: 2200 27: 2200
    28: 2200 29: 2200 30: 2200 31: 2200 32: 2200 bogomips: 217611
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm
  Vulnerabilities:
  Type: gather_data_sampling status: Not affected
  Type: itlb_multihit status: Not affected
  Type: l1tf status: Not affected
  Type: mds status: Not affected
  Type: meltdown status: Not affected
  Type: mmio_stale_data status: Not affected
  Type: reg_file_data_sampling status: Not affected
  Type: retbleed status: Not affected
  Type: spec_rstack_overflow mitigation: Safe RET
  Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via prctl
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization
  Type: spectre_v2 mitigation: Retpolines; IBPB: conditional; IBRS_FW; STIBP: always-on; RSB
    filling; PBRSB-eIBRS: Not affected; BHI: Not affected
  Type: srbds status: Not affected
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: AMD Navi 22 [Radeon RX 6700/6700 XT/6750 XT / 6800M/6850M XT] vendor: Tul / PowerColor
    driver: amdgpu v: kernel arch: RDNA-2 code: Navi-2x process: TSMC n7 (7nm) built: 2020-22 pcie:
    gen: 4 speed: 16 GT/s lanes: 16 ports: active: DP-1 empty: DP-2, DP-3, HDMI-A-1, Writeback-1
    bus-ID: 0b:00.0 chip-ID: 1002:73df class-ID: 0300
  Display: x11 server: X.Org v: 1.21.1.7 compositor: kwin_x11 driver: X: loaded: amdgpu
    unloaded: fbdev,modesetting,radeon,vesa dri: radeonsi gpu: amdgpu display-ID: :0 screens: 1
  Screen-1: 0 s-res: 2560x1440 s-dpi: 96 s-size: 677x381mm (26.65x15.00") s-diag: 777mm (30.58")
  Monitor-1: DP-1 mapped: DisplayPort-0 model: HP X27q serial: <filter> built: 2021
    res: 2560x1440 hz: 165 dpi: 109 gamma: 1.2 size: 597x336mm (23.5x13.23") diag: 685mm (27")
    ratio: 16:9 modes: max: 2560x1440 min: 720x400
  API: OpenGL v: 4.6 Mesa 24.2.2-1~mx23ahs renderer: AMD Radeon RX 6700 XT (radeonsi navi22 LLVM
    15.0.6 DRM 3.59 6.12.6-1-liquorix-amd64) direct-render: Yes
Audio:
  Device-1: AMD Navi 21/23 HDMI/DP Audio driver: snd_hda_intel v: kernel pcie: gen: 4
    speed: 16 GT/s lanes: 16 bus-ID: 0b:00.1 chip-ID: 1002:ab28 class-ID: 0403
  Device-2: AMD Starship/Matisse HD Audio vendor: Micro-Star MSI driver: snd_hda_intel v: kernel
    pcie: gen: 4 speed: 16 GT/s lanes: 16 bus-ID: 14:00.4 chip-ID: 1022:1487 class-ID: 0403
  API: ALSA v: k6.12.6-1-liquorix-amd64 status: kernel-api tools: alsamixer,amixer
  Server-1: PipeWire v: 1.0.0 status: active with: 1: pipewire-pulse status: active
    2: wireplumber status: active 3: pipewire-alsa type: plugin 4: pw-jack type: plugin
    tools: pactl,pw-cat,pw-cli,wpctl
Network:
  Message: No PCI device data found.
  Device-1: NetGear Wireless_Device type: USB driver: mt7921u bus-ID: 4-1:2 chip-ID: 0846:9060
    class-ID: 0000 serial: <filter>
  IF: wlan0 state: up mac: <filter>
Drives:
  Local Storage: total: 8.64 TiB used: 12.68 GiB (0.1%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/nvme0n1 maj-min: 259:2 vendor: Western Digital model: WDS500G1X0E-00AFY0
    size: 465.76 GiB block-size: physical: 512 B logical: 512 B speed: 63.2 Gb/s lanes: 4 type: SSD
    serial: <filter> rev: 613000WD temp: 32.9 C scheme: GPT
  ID-2: /dev/nvme1n1 maj-min: 259:0 vendor: Western Digital model: WDS500G3XHC-00SJG0
    size: 465.76 GiB block-size: physical: 512 B logical: 512 B speed: 31.6 Gb/s lanes: 4 type: SSD
    serial: <filter> rev: 102000WD temp: 30.9 C scheme: GPT
  ID-3: /dev/sda maj-min: 8:0 vendor: SanDisk model: ST8000DM004-2CX188 size: 7.28 TiB
    block-size: physical: 4096 B logical: 512 B speed: 6.0 Gb/s type: HDD rpm: 5425 serial: <filter>
    rev: 0001 scheme: GPT
  ID-4: /dev/sdb maj-min: 8:16 vendor: Samsung model: SSD 870 EVO 500GB size: 465.76 GiB
    block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s type: SSD serial: <filter> rev: 1B6Q
    scheme: GPT
Partition:
  ID-1: / raw-size: 465.76 GiB size: 457.38 GiB (98.20%) used: 12.68 GiB (2.8%) fs: ext4
    dev: /dev/nvme1n1p1 maj-min: 259:1
  ID-2: /boot/efi raw-size: 779 MiB size: 777.5 MiB (99.80%) used: 288 KiB (0.0%) fs: vfat
    dev: /dev/nvme0n1p1 maj-min: 259:3
Swap:
  Kernel: swappiness: 15 (default 60) cache-pressure: 100 (default)
  ID-1: swap-1 type: partition size: 64 GiB used: 0 KiB (0.0%) priority: -2 dev: /dev/sdb2
    maj-min: 8:18
Sensors:
  System Temperatures: cpu: 28.0 C mobo: N/A gpu: amdgpu temp: 37.0 C mem: 38.0 C
  Fan Speeds (RPM): N/A gpu: amdgpu fan: 0
Repos:
  Packages: pm: dpkg pkgs: 3125 libs: 1555 tools: apt,apt-get,aptitude,nala,synaptic pm: rpm
    pkgs: 0 pm: flatpak pkgs: 0
  No active apt repos in: /etc/apt/sources.list
  Active apt repos in: /etc/apt/sources.list.d/debian-stable-updates.list
    1: deb http://deb.debian.org/debian bookworm-updates main contrib non-free non-free-firmware
  Active apt repos in: /etc/apt/sources.list.d/debian.list
    1: deb http://deb.debian.org/debian bookworm main contrib non-free non-free-firmware
    2: deb http://security.debian.org/debian-security bookworm-security main contrib non-free non-free-firmware
  Active apt repos in: /etc/apt/sources.list.d/mx.list
    1: deb http://la.mxrepo.com/mx/repo/ bookworm main non-free
    2: deb http://la.mxrepo.com/mx/repo/ bookworm ahs
Info:
  Processes: 533 Uptime: 0m wakeups: 0 Memory: 31.27 GiB used: 1.64 GiB (5.2%) Init: systemd v: 252
  target: graphical (5) default: graphical tool: systemctl Compilers: gcc: 12.2.0 alt: 12
  Client: shell wrapper v: 5.2.15-release inxi: 3.3.26
Boot Mode: UEFI

[django013]

Hi,

Could you explain this setup a little more.
Which connectors are you using from the graphics cards? Is it going to a computer monitor (multiple?)
What's a beamer?
AV amplifier?

Projector (beamer): https://www.sharpnecdisplays.eu/p/datas ... 25ul.xhtml
Amplifier: https://de.yamaha.com/de/products/audio ... oduct-tabs

Both items are HDMI-Splitters and at first attempt I connected the projector to video-out of the amplifier.
But dynamic cable sensing of Linux is very spongy, which often resulted in black screen. Even during movie playback.
Once screen was black, there's no way to turn video back on (or at least I didn't find one). Reboot was the only option

So I looked for a solution to avoid cable sensing ...

Now I have connected both (amplifier and projector) to displayports of nvidia grafic card.
The amplifiers video out is not connected and projectors speakers are turned off.
That setup was a bit tricky.
With KDE-setup I selected that amplifier-screen is a copy of projector-screen (which in turn duplicates audio out on both displayports used).
In audio-setup I selected nvidia card as default and tested and selected 5.1 output

In good times, this setup works wonderful, but it is diva-like when it comes to system updates

... and I have no idea, who is causing that hiccups

[siamhie]

Hi,

Could you explain this setup a little more.
Which connectors are you using from the graphics cards? Is it going to a computer monitor (multiple?)
What's a beamer?
AV amplifier?

Projector (beamer): https://www.sharpnecdisplays.eu/p/datas ... 25ul.xhtml
Amplifier: https://www.sharpnecdisplays.eu/p/datas ... 25ul.xhtml

Both items are HDMI-Splitters and at first attempt I connected the projector to video-out of the amplifier.
But dynamic cable sensing of Linux is very spongy, which often resulted in black screen. Even during movie playback.
Once screen was black, there's no way to turn video back on (or at least I didn't find one). Reboot was the only option

So I looked for a solution to avoid cable sensing ...

Now I have connected both (amplifier and projector) to displayports of nvidia grafic card.
The amplifiers video out is not connected and projectors speakers are turned off.
That setup was a bit tricky.
With KDE-setup I selected that amplifier-screen is a copy of projector-screen (which in turn duplicates audio out on both displayports used).
In audio-setup I selected nvidia card as default and tested and selected 5.1 output

In good times, this setup works wonderful, but it is diva-like when it comes to system updates

... and I have no idea, who is causing that hiccups

The amplifier link points to the same projector link but I get what you are doing.
Instead of connecting the computer to a monitor/television, your using a projector which is where you are experiencing the audio/video problems?

Have you tried connecting to a computer monitor to rule out issues with the computer and/or the software programs you are using?

[Stevo]

Today's update of multimedia libraries has made problems even worse. The hiccups now last more than twice as long as yesterday.

The only recent ones I can find are

Code: Select all

2024-12-29  16:10:56  upgrade  gstreamer1.0-pulseaudio                   amd64  1.22.0-5+deb12u1                 1.22.0-5+deb12u2
2024-12-29  16:10:56  upgrade  gstreamer1.0-plugins-good                 amd64  1.22.0-5+deb12u1                 1.22.0-5+deb12u2
2024-12-29  16:10:56  upgrade  gstreamer1.0-gtk3                         amd64  1.22.0-5+deb12u1                 1.22.0-5+deb12u2

And since vlc or mpv don't use gstreamer, they should have been unaffected.