Merci xubu1957. Voici l'output des commandes :
delgan@delgan-ZenBook:~$ lsusb | sort; echo; lsusb -t
Bus 001 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 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 8087:0026 Intel Corp.
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 10000M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/12p, 480M
|__ Port 10: Dev 2, If 0, Class=Wireless, Driver=btusb, 12M
|__ Port 10: Dev 2, If 1, Class=Wireless, Driver=btusb, 12M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 10000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
delgan@delgan-ZenBook:~$ lsmod | sort
ac97_bus 16384 1 snd_soc_core
acpi_pad 184320 0
acpi_tad 16384 0
acpi_thermal_rel 16384 1 int3400_thermal
aesni_intel 372736 14
af_alg 24576 14 algif_hash,algif_skcipher
ahci 40960 0
algif_hash 16384 3
algif_skcipher 16384 3
asus_nb_wmi 32768 0
asus_wmi 32768 1 asus_nb_wmi
aufs 262144 0
autofs4 45056 2
binfmt_misc 24576 1
bluetooth 548864 31 btrtl,btintel,btbcm,bnep,btusb,rfcomm
bnep 24576 2
bpfilter 32768 0
bridge 176128 1 br_netfilter
br_netfilter 28672 0
btbcm 16384 1 btusb
btintel 24576 1 btusb
btrtl 24576 1 btusb
btusb 57344 0
ccm 20480 3
cfg80211 704512 3 iwlmvm,iwlwifi,mac80211
cmac 16384 7
coretemp 20480 0
crc32_pclmul 16384 0
crct10dif_pclmul 16384 1
cryptd 24576 6 crypto_simd,ghash_clmulni_intel
crypto_simd 16384 1 aesni_intel
dm_crypt 40960 1
drm 491520 7 drm_kms_helper,i915
drm_kms_helper 184320 1 i915
ecc 28672 1 ecdh_generic
ecdh_generic 16384 2 bluetooth
fb_sys_fops 16384 1 drm_kms_helper
ghash_clmulni_intel 16384 0
glue_helper 16384 1 aesni_intel
hid 131072 3 i2c_hid,hid_multitouch,hid_generic
hid_generic 16384 0
hid_multitouch 28672 0
i2c_algo_bit 16384 1 i915
i2c_hid 28672 0
i2c_i801 32768 0
i915 1990656 15
idma64 20480 0
input_leds 16384 0
int3400_thermal 20480 0
int3403_thermal 20480 0
int340x_thermal_zone 16384 2 int3403_thermal,processor_thermal_device
intel_cstate 20480 0
intel_lpss 16384 1 intel_lpss_pci
intel_lpss_pci 20480 0
intel_powerclamp 20480 0
intel_rapl_common 24576 2 intel_rapl_msr,processor_thermal_device
intel_rapl_msr 20480 0
intel_soc_dts_iosf 20480 1 processor_thermal_device
ip6table_filter 16384 1
ip6_tables 32768 1 ip6table_filter
iptable_filter 16384 1
iptable_nat 16384 1
ip_tables 32768 2 iptable_filter,iptable_nat
iwlmvm 380928 0
iwlwifi 331776 1 iwlmvm
joydev 24576 0
kvm 663552 1 kvm_intel
kvm_intel 282624 0
ledtrig_audio 16384 3 snd_hda_codec_generic,snd_hda_codec_realtek,snd_sof
libahci 32768 1 ahci
libarc4 16384 1 mac80211
libcrc32c 16384 2 nf_conntrack,nf_nat
llc 16384 2 bridge,stp
lp 20480 0
mac80211 843776 1 iwlmvm
mac_hid 16384 0
mei 106496 3 mei_hdcp,mei_me
mei_hdcp 24576 0
mei_me 40960 1
memstick 20480 1 rtsx_pci_ms
Module Size Used by
nf_conntrack 139264 4 xt_conntrack,nf_nat,nf_conntrack_netlink,xt_MASQUERADE
nf_conntrack_netlink 45056 0
nf_defrag_ipv4 16384 1 nf_conntrack
nf_defrag_ipv6 24576 1 nf_conntrack
nf_nat 40960 2 iptable_nat,xt_MASQUERADE
nfnetlink 16384 2 nf_conntrack_netlink
nls_iso8859_1 16384 1
nvme 49152 3
nvme_core 102400 5 nvme
overlay 114688 0
parport 53248 3 parport_pc,lp,ppdev
parport_pc 40960 0
pinctrl_icelake 24576 0
pinctrl_intel 28672 1 pinctrl_icelake
ppdev 24576 0
processor_thermal_device 24576 0
rapl 20480 0
rfcomm 81920 4
rtsx_pci 73728 2 rtsx_pci_sdmmc,rtsx_pci_ms
rtsx_pci_ms 24576 0
rtsx_pci_sdmmc 28672 0
sch_fq_codel 20480 2
serio_raw 20480 0
snd 90112 19 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_compress,snd_soc_core,snd_pcm,snd_rawmidi
snd_compress 24576 1 snd_soc_core
snd_hda_codec 135168 5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek,snd_soc_hdac_hda
snd_hda_codec_generic 81920 1 snd_hda_codec_realtek
snd_hda_codec_hdmi 61440 1
snd_hda_codec_realtek 126976 1
snd_hda_core 90112 9 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_hda_codec_realtek,snd_sof_intel_hda_common,snd_soc_hdac_hda,snd_sof_intel_hda
snd_hda_ext_core 28672 3 snd_sof_intel_hda_common,snd_soc_hdac_hda,snd_sof_intel_hda
snd_hda_intel 53248 3
snd_hwdep 20480 1 snd_hda_codec
snd_intel_dspcfg 24576 3 snd_hda_intel,snd_sof_pci,snd_sof_intel_hda_common
snd_pcm 106496 8 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_sof,snd_sof_intel_hda_common,snd_soc_core,snd_hda_core,snd_pcm_dmaengine
snd_pcm_dmaengine 16384 1 snd_soc_core
snd_rawmidi 36864 1 snd_seq_midi
snd_seq 69632 2 snd_seq_midi,snd_seq_midi_event
snd_seq_device 16384 3 snd_seq,snd_seq_midi,snd_rawmidi
snd_seq_midi 20480 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_soc_acpi 16384 2 snd_sof_pci,snd_soc_acpi_intel_match
snd_soc_acpi_intel_match 32768 2 snd_sof_pci,snd_sof_intel_hda_common
snd_soc_core 245760 3 snd_sof,snd_sof_intel_hda_common,snd_soc_hdac_hda
snd_soc_hdac_hda 24576 1 snd_sof_intel_hda_common
snd_sof 106496 4 snd_sof_pci,snd_sof_intel_hda_common,snd_sof_intel_byt,snd_sof_intel_ipc
snd_sof_intel_byt 20480 1 snd_sof_pci
snd_sof_intel_hda 20480 1 snd_sof_intel_hda_common
snd_sof_intel_hda_common 69632 1 snd_sof_pci
snd_sof_intel_ipc 20480 1 snd_sof_intel_byt
snd_sof_pci 20480 0
snd_sof_xtensa_dsp 16384 1 snd_sof_pci
snd_timer 36864 2 snd_seq,snd_pcm
soundcore 16384 1 snd
sparse_keymap 16384 1 asus_wmi
stp 16384 1 bridge
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
thunderbolt 167936 0
typec 45056 1 typec_ucsi
typec_ucsi 40960 1 ucsi_acpi
ucsi_acpi 16384 0
video 49152 2 asus_wmi,i915
virt_dma 20480 1 idma64
wmi 32768 2 asus_wmi,wmi_bmof
wmi_bmof 16384 0
x86_pkg_temp_thermal 20480 0
xfrm_algo 16384 1 xfrm_user
xfrm_user 36864 1
x_tables 40960 8 ip6table_filter,xt_conntrack,iptable_filter,xt_multiport,xt_addrtype,ip6_tables,ip_tables,xt_MASQUERADE
xt_addrtype 16384 2
xt_conntrack 16384 2
xt_MASQUERADE 20480 2
xt_multiport 20480 4
delgan@delgan-ZenBook:~$ dmesg | grep -i usb
[ 0.013900] ACPI: SSDT 0x0000000058471000 00176F (v02 _ASUS_ UsbCTabl 00001000 INTL 20180927)
[ 0.617644] ACPI: bus type USB registered
[ 0.617644] usbcore: registered new interface driver usbfs
[ 0.617644] usbcore: registered new interface driver hub
[ 0.617644] usbcore: registered new device driver usb
[ 0.808197] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 0.808210] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 0.808219] uhci_hcd: USB Universal Host Controller Interface driver
[ 0.808264] xhci_hcd 0000:00:0d.0: new USB bus registered, assigned bus number 1
[ 0.809433] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.04
[ 0.809434] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.809435] usb usb1: Product: xHCI Host Controller
[ 0.809436] usb usb1: Manufacturer: Linux 5.4.0-65-generic xhci-hcd
[ 0.809436] usb usb1: SerialNumber: 0000:00:0d.0
[ 0.809512] hub 1-0:1.0: USB hub found
[ 0.809677] xhci_hcd 0000:00:0d.0: new USB bus registered, assigned bus number 2
[ 0.809678] xhci_hcd 0000:00:0d.0: Host supports USB 3.1 Enhanced SuperSpeed
[ 0.809702] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.04
[ 0.809703] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.809703] usb usb2: Product: xHCI Host Controller
[ 0.809704] usb usb2: Manufacturer: Linux 5.4.0-65-generic xhci-hcd
[ 0.809704] usb usb2: SerialNumber: 0000:00:0d.0
[ 0.809747] hub 2-0:1.0: USB hub found
[ 0.810719] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 3
[ 0.811954] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.04
[ 0.811954] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.811955] usb usb3: Product: xHCI Host Controller
[ 0.811956] usb usb3: Manufacturer: Linux 5.4.0-65-generic xhci-hcd
[ 0.811956] usb usb3: SerialNumber: 0000:00:14.0
[ 0.812024] hub 3-0:1.0: USB hub found
[ 0.813680] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 4
[ 0.813681] xhci_hcd 0000:00:14.0: Host supports USB 3.1 Enhanced SuperSpeed
[ 0.813701] usb usb4: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.04
[ 0.813702] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.813702] usb usb4: Product: xHCI Host Controller
[ 0.813703] usb usb4: Manufacturer: Linux 5.4.0-65-generic xhci-hcd
[ 0.813703] usb usb4: SerialNumber: 0000:00:14.0
[ 0.813772] hub 4-0:1.0: USB hub found
[ 1.156786] usb 3-10: new full-speed USB device number 2 using xhci_hcd
[ 1.306675] usb 3-10: New USB device found, idVendor=8087, idProduct=0026, bcdDevice= 0.02
[ 1.306676] usb 3-10: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 11.173080] usbcore: registered new interface driver btusb
[ 11.700802] audit: type=1400 audit(1612020631.347:11): apparmor="STATUS" operation="profile_load" profile="unconfined" name="ippusbxd" pid=847 comm="apparmor_parser"
[ 16.180814] ucsi_acpi USBC000:00: PPM NOT RESPONDING
[ 16.228656] ucsi_acpi USBC000:00: PPM init failed (-110)
delgan@delgan-ZenBook:~$ webcam
reading config file: /home/delgan/.webcamrc
v4l2: open /dev/video0: No such file or directory
vid-open: failed: libv4l
no grabber device available