Public bug reported:
After connecting a laptop to TV set via HDMI and redirecting the sound to HDMI
the sound becomes distorted.
It worked perfectly fine on Xubuntu 18.04. The issue occurred immediately after
upgrading to Xubuntu 20.04.
It usually works correctly when the movie started playing before the laptop was
connected to TV-set. Right after connecting the laptop to the TV-set the movie
continues to play with no sound issues. The sound issues occur when a movie is
paused and resumed to play. The audio is distorted then.
The 100% workaround is to change the refresh rate in Xubuntu's display settings
to another value e.g. 60Hz. It works until I pause the movie again. Then I need
to switch back to the previous refresh rate e.g. 50Hz and so on. In general I
choose between 50 and 60 Hz in a round-robin fashion.
The issue occurs when playing the movies via all available players e.g.
mplayer, vlc or embedded in web browser.
It never occurs when using the Laptop's display.
I cannot observe any system log entries regarding this issue.
OS: Xubuntu 20.04
Kernel: 5.4.0-58-generic #64-Ubuntu SMP
Laptop: Dell Latitude E7440
TV-set: Panasonic TX-42AS500E
# dmesg |grep -i audio
[ 0.131266] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[ 8.527979] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops
i915_audio_component_bind_ops [i915])
[ 8.558111] snd_hda_codec_realtek hdaudioC1D0: autoconfig for ALC3226:
line_outs=1 (0x16/0x0/0x0/0x0/0x0) type:line
[ 8.558114] snd_hda_codec_realtek hdaudioC1D0: speaker_outs=1
(0x14/0x0/0x0/0x0/0x0)
[ 8.558116] snd_hda_codec_realtek hdaudioC1D0: hp_outs=1
(0x15/0x0/0x0/0x0/0x0)
[ 8.558117] snd_hda_codec_realtek hdaudioC1D0: mono: mono_out=0x0
[ 8.558118] snd_hda_codec_realtek hdaudioC1D0: inputs:
[ 8.558120] snd_hda_codec_realtek hdaudioC1D0: Dock Mic=0x19
[ 8.558122] snd_hda_codec_realtek hdaudioC1D0: Headset Mic=0x1a
[ 8.558124] snd_hda_codec_realtek hdaudioC1D0: Internal Mic=0x12
[10557.458937] Modules linked in: ccm vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE)
bnep intel_rapl_msr pn544_mei binfmt_misc mei_phy pn544 snd_hda_codec_realtek
snd_hda_codec_generic uvcvideo snd_hda_codec_hdmi snd_hda_intel hci
snd_intel_dspcfg videobuf2_vmalloc snd_hda_codec nfc btusb videobuf2_memops
btrtl snd_hda_core mei_hdcp videobuf2_v4l2 btbcm snd_hwdep videobuf2_common
btintel videodev bluetooth mc snd_pcm ecdh_generic ecc snd_seq_midi
snd_seq_midi_event snd_rawmidi intel_rapl_common iwlmvm x86_pkg_temp_thermal
intel_powerclamp dell_laptop ledtrig_audio coretemp mac80211 kvm_intel snd_seq
snd_seq_device libarc4 dell_smm_hwmon snd_timer kvm iwlwifi snd rapl
intel_cstate input_leds dell_wmi dell_smbios joydev dcdbas sparse_keymap
wmi_bmof dell_wmi_descriptor serio_raw mei_me cfg80211 mei soundcore mac_hid
dell_rbtn dell_smo8800 sch_fq_codel parport_pc ppdev lp parport sunrpc
ip_tables x_tables autofs4 i915 i2c_algo_bit drm_kms_helper syscopyarea
crct10dif_pclmul sysfillrect crc32_pclmul
[10557.563972] Modules linked in: ccm vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE)
bnep intel_rapl_msr pn544_mei binfmt_misc mei_phy pn544 snd_hda_codec_realtek
snd_hda_codec_generic uvcvideo snd_hda_codec_hdmi snd_hda_intel hci
snd_intel_dspcfg videobuf2_vmalloc snd_hda_codec nfc btusb videobuf2_memops
btrtl snd_hda_core mei_hdcp videobuf2_v4l2 btbcm snd_hwdep videobuf2_common
btintel videodev bluetooth mc snd_pcm ecdh_generic ecc snd_seq_midi
snd_seq_midi_event snd_rawmidi intel_rapl_common iwlmvm x86_pkg_temp_thermal
intel_powerclamp dell_laptop ledtrig_audio coretemp mac80211 kvm_intel snd_seq
snd_seq_device libarc4 dell_smm_hwmon snd_timer kvm iwlwifi snd rapl
intel_cstate input_leds dell_wmi dell_smbios joydev dcdbas sparse_keymap
wmi_bmof dell_wmi_descriptor serio_raw mei_me cfg80211 mei soundcore mac_hid
dell_rbtn dell_smo8800 sch_fq_codel parport_pc ppdev lp parport sunrpc
ip_tables x_tables autofs4 i915 i2c_algo_bit drm_kms_helper syscopyarea
crct10dif_pclmul sysfillrect crc32_pclmul
# dmesg |grep -i hdmi
[ 0.131266] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[ 8.543890] input: HDA Intel HDMI HDMI/DP,pcm=3 as
/devices/pci0000:00/0000:00:03.0/sound/card0/input10
[ 8.543955] input: HDA Intel HDMI HDMI/DP,pcm=7 as
/devices/pci0000:00/0000:00:03.0/sound/card0/input11
[ 8.544014] input: HDA Intel HDMI HDMI/DP,pcm=8 as
/devices/pci0000:00/0000:00:03.0/sound/card0/input12
[ 8.544069] input: HDA Intel HDMI HDMI/DP,pcm=9 as
/devices/pci0000:00/0000:00:03.0/sound/card0/input13
[ 8.544133] input: HDA Intel HDMI HDMI/DP,pcm=10 as
/devices/pci0000:00/0000:00:03.0/sound/card0/input14
[10557.458937] Modules linked in: ccm vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE)
bnep intel_rapl_msr pn544_mei binfmt_misc mei_phy pn544 snd_hda_codec_realtek
snd_hda_codec_generic uvcvideo snd_hda_codec_hdmi snd_hda_intel hci
snd_intel_dspcfg videobuf2_vmalloc snd_hda_codec nfc btusb videobuf2_memops
btrtl snd_hda_core mei_hdcp videobuf2_v4l2 btbcm snd_hwdep videobuf2_common
btintel videodev bluetooth mc snd_pcm ecdh_generic ecc snd_seq_midi
snd_seq_midi_event snd_rawmidi intel_rapl_common iwlmvm x86_pkg_temp_thermal
intel_powerclamp dell_laptop ledtrig_audio coretemp mac80211 kvm_intel snd_seq
snd_seq_device libarc4 dell_smm_hwmon snd_timer kvm iwlwifi snd rapl
intel_cstate input_leds dell_wmi dell_smbios joydev dcdbas sparse_keymap
wmi_bmof dell_wmi_descriptor serio_raw mei_me cfg80211 mei soundcore mac_hid
dell_rbtn dell_smo8800 sch_fq_codel parport_pc ppdev lp parport sunrpc
ip_tables x_tables autofs4 i915 i2c_algo_bit drm_kms_helper syscopyarea
crct10dif_pclmul sysfillrect crc32_pclmul
[10557.563972] Modules linked in: ccm vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE)
bnep intel_rapl_msr pn544_mei binfmt_misc mei_phy pn544 snd_hda_codec_realtek
snd_hda_codec_generic uvcvideo snd_hda_codec_hdmi snd_hda_intel hci
snd_intel_dspcfg videobuf2_vmalloc snd_hda_codec nfc btusb videobuf2_memops
btrtl snd_hda_core mei_hdcp videobuf2_v4l2 btbcm snd_hwdep videobuf2_common
btintel videodev bluetooth mc snd_pcm ecdh_generic ecc snd_seq_midi
snd_seq_midi_event snd_rawmidi intel_rapl_common iwlmvm x86_pkg_temp_thermal
intel_powerclamp dell_laptop ledtrig_audio coretemp mac80211 kvm_intel snd_seq
snd_seq_device libarc4 dell_smm_hwmon snd_timer kvm iwlwifi snd rapl
intel_cstate input_leds dell_wmi dell_smbios joydev dcdbas sparse_keymap
wmi_bmof dell_wmi_descriptor serio_raw mei_me cfg80211 mei soundcore mac_hid
dell_rbtn dell_smo8800 sch_fq_codel parport_pc ppdev lp parport sunrpc
ip_tables x_tables autofs4 i915 i2c_algo_bit drm_kms_helper syscopyarea
crct10dif_pclmul sysfillrect crc32_pclmul
# lspci -vvv
00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller (rev 04)
Subsystem: Dell 8 Series HD Audio Controller
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 50
Region 0: Memory at f7e30000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 3
Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA
PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
Address: 00000000fee00398 Data: 0000
Capabilities: [70] Express (v1) Root Complex Integrated Endpoint, MSI 00
DevCap: MaxPayload 128 bytes, PhantFunc 0
ExtTag- RBE- FLReset+
DevCtl: CorrErr- NonFatalErr- FatalErr- UnsupReq-
RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- FLReset-
MaxPayload 128 bytes, MaxReadReq 128 bytes
DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr+
TransPend-
Capabilities: [100 v1] Virtual Channel
Caps: LPEVC=0 RefClk=100ns PATEntryBits=1
Arb: Fixed- WRR32- WRR64- WRR128-
Ctrl: ArbSelect=Fixed
Status: InProgress-
VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=01
Status: NegoPending- InProgress-
VC1: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
Ctrl: Enable- ID=2 ArbSelect=Fixed TC/VC=04
Status: NegoPending- InProgress-
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1909866
Title:
[Xubuntu 20.04] Distorted HDMI audio
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