This also affects me but on ubuntu 20.04. Some how the HDMI output switches randomly. For example sometimes i have HDMI-audio when i switch the output to 5.1, sometimes i have to use stereo and somedays i need to switch to 7.1. I own a xps 13 9380 which came preinstalled with ubuntu 18.04.
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1832031 Title: No sound on external Samsung Monitor via Display Port/HDMI Status in pulseaudio package in Ubuntu: Confirmed Bug description: Hello, I have two external monitor connected via a Dell TB16 (thunderbolt). One is a Samsung T28C570 and the other one is a Samsung CF791. The first one is connected via HDMI. The second one is connected via Display Port. The problem is that sound on Samsung CF791 doesn't work. I know it's not a mixer problem because: 1) Sometime, If i press CTRL+ALT+F2 (to enter in console mode) and then go back on Desktop with CTRL+ALT+F1 i can heard sound from the monitor when I increase or decrease volume, even if a little bit distorted. Nevertheless, if I try to play a video (for example youtube), sound stops to work. I have to stop any audio stream, return to console mode and back again in desktop to hear again distorted sound then increase volume. 2) On Windows, I have no problem (so it seems not to be an hardware issue). I tried to connect the CF791 via HDMI, but problem persist. I have no problem with the other monitor. I have checked every alsamixer e pavucontrol settings unsuccessful. My laptop is a Dell XPS 13. Description: Ubuntu 18.04.2 LTS Release: 18.04 THe HDMI2 is the not working audio device: **** Lista di PLAYBACK dispositivi hardware **** scheda 0: PCH [HDA Intel PCH], dispositivo 0: ALC3271 Analog [ALC3271 Analog] Sottoperiferiche: 1/1 Sottoperiferica #0: subdevice #0 scheda 0: PCH [HDA Intel PCH], dispositivo 3: HDMI 0 [HDMI 0] Sottoperiferiche: 1/1 Sottoperiferica #0: subdevice #0 scheda 0: PCH [HDA Intel PCH], dispositivo 7: HDMI 1 [HDMI 1] Sottoperiferiche: 0/1 Sottoperiferica #0: subdevice #0 scheda 0: PCH [HDA Intel PCH], dispositivo 8: HDMI 2 [HDMI 2] Sottoperiferiche: 1/1 Sottoperiferica #0: subdevice #0 scheda 0: PCH [HDA Intel PCH], dispositivo 9: HDMI 3 [HDMI 3] Sottoperiferiche: 1/1 Sottoperiferica #0: subdevice #0 scheda 0: PCH [HDA Intel PCH], dispositivo 10: HDMI 4 [HDMI 4] Sottoperiferiche: 1/1 Sottoperiferica #0: subdevice #0 scheda 1: Dock [WD15 Dock], dispositivo 0: USB Audio [USB Audio] Sottoperiferiche: 1/1 Sottoperiferica #0: subdevice #0 scheda 1: Dock [WD15 Dock], dispositivo 1: USB Audio [USB Audio #1] Sottoperiferiche: 1/1 Hardware list: 00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 08) 00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07) 00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 08) 00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21) 00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21) 00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 (rev 21) 00:15.1 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 (rev 21) 00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21) 00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #1 (rev f1) 00:1c.2 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #3 (rev f1) 00:1c.4 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 (rev f1) 00:1d.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #9 (rev f1) 00:1f.0 ISA bridge: Intel Corporation Intel(R) 100 Series Chipset Family LPC Controller/eSPI Controller - 9D4E (rev 21) 00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21) 00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21) 00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21) 01:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01) 02:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32) 03:00.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02) 04:00.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02) 04:01.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02) 04:02.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02) 04:04.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02) 05:00.0 System peripheral: Intel Corporation JHL6540 Thunderbolt 3 NHI (C step) [Alpine Ridge 4C 2016] (rev 02) 3a:00.0 PCI bridge: Intel Corporation DSL6540 Thunderbolt 3 Bridge [Alpine Ridge 4C 2015] 3b:01.0 PCI bridge: Intel Corporation DSL6540 Thunderbolt 3 Bridge [Alpine Ridge 4C 2015] 3b:04.0 PCI bridge: Intel Corporation DSL6540 Thunderbolt 3 Bridge [Alpine Ridge 4C 2015] 3d:00.0 PCI bridge: Intel Corporation DSL6540 Thunderbolt 3 Bridge [Alpine Ridge 4C 2015] 3e:01.0 PCI bridge: Intel Corporation DSL6540 Thunderbolt 3 Bridge [Alpine Ridge 4C 2015] 3e:04.0 PCI bridge: Intel Corporation DSL6540 Thunderbolt 3 Bridge [Alpine Ridge 4C 2015] 3f:00.0 USB controller: ASMedia Technology Inc. ASM1042A USB 3.0 Host Controller 6e:00.0 Non-Volatile memory controller: Toshiba America Info Systems Device 0116 lsusb: Bus 004 Device 003: ID 0bda:8153 Realtek Semiconductor Corp. Bus 004 Device 002: ID 0424:5807 Standard Microsystems Corp. Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 003 Device 003: ID 0bda:4014 Realtek Semiconductor Corp. Bus 003 Device 002: ID 0424:2807 Standard Microsystems Corp. Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 0489:e0a2 Foxconn / Hon Hai Bus 001 Device 002: ID 0bda:58f4 Realtek Semiconductor Corp. Bus 001 Device 004: ID 27c6:5385 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Best regards, Salvatore To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1832031/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
