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#1 2020-11-16 09:36:29
- Rixxo
- Member
- Registered: 2020-11-15
- Posts: 2
Webcam issue black screen
Hi everyone,
I am experiencing issues with my webcam on Wayland and Xorg with Gnome. It doesn't working with Cheese, since I see a black square; and doesn't work with Google Hangout/Meet (on Firefox, Chromium, or Gnome Web). However, it does work with Zoom. I have done some troubleshooting, and I am not able to figure out the problem. The webcam is recognized by the system and does work if you try to capture its stream into a file. For example, I have run the following command, and I was able to see my face in the video that was generated:
ffmpeg -f v4l2 -framerate 90 -video_size 1280x720 -input_format mjpeg -i /dev/video0 out.mkvTo share some general info about the status of my system:
$ dmesg | grep "usb 1-7"
[ 1.993552] usb 1-7: new high-speed USB device number 3 using xhci_hcd
[ 2.246939] usb 1-7: New USB device found, idVendor=0bda, idProduct=579f, bcdDevice= 0.02
[ 2.246944] usb 1-7: New USB device strings: Mfr=3, Product=1, SerialNumber=2
[ 2.246947] usb 1-7: Product: USB Camera
[ 2.246949] usb 1-7: Manufacturer: 11121119-000JM312X
[ 2.246951] usb 1-7: SerialNumber: 200901010001$ dmesg | grep Camera
[ 2.246947] usb 1-7: Product: USB Camera
[ 55.970797] uvcvideo: Found UVC 1.00 device USB Camera (0bda:579f)
[ 55.985396] input: USB Camera: USB Camera as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/input/input14$ v4l2-ctl --list-devices
USB Camera: USB Camera (usb-0000:00:14.0-7):
/dev/video0
/dev/video1
/dev/media0$ v4l2-ctl --list-ctrls
brightness 0x00980900 (int) : min=-64 max=64 step=1 default=0 value=0
contrast 0x00980901 (int) : min=0 max=100 step=1 default=50 value=50
saturation 0x00980902 (int) : min=0 max=100 step=1 default=64 value=64
hue 0x00980903 (int) : min=-180 max=180 step=1 default=0 value=0
white_balance_temperature_auto 0x0098090c (bool) : default=1 value=1
gamma 0x00980910 (int) : min=100 max=500 step=1 default=300 value=300
gain 0x00980913 (int) : min=0 max=64 step=1 default=0 value=0
power_line_frequency 0x00980918 (menu) : min=0 max=2 default=1 value=1
white_balance_temperature 0x0098091a (int) : min=2800 max=6500 step=10 default=4600 value=4600 flags=inactive
sharpness 0x0098091b (int) : min=0 max=100 step=1 default=50 value=50
backlight_compensation 0x0098091c (int) : min=0 max=1 step=1 default=0 value=0
exposure_auto_priority 0x009a0903 (bool) : default=0 value=1$ lsmod
Module Size Used by
snd_seq_dummy 16384 0
snd_hrtimer 16384 1
snd_seq 86016 7 snd_seq_dummy
snd_seq_device 16384 1 snd_seq
uhid 20480 1
ccm 20480 6
rfcomm 90112 16
fuse 139264 3
joydev 28672 0
input_leds 16384 0
mousedev 24576 0
nvidia_drm 57344 0
nvidia_modeset 1220608 1 nvidia_drm
snd_hda_codec_hdmi 73728 2
cmac 16384 9
algif_hash 16384 4
algif_skcipher 16384 4
af_alg 28672 18 algif_hash,algif_skcipher
bnep 28672 2
snd_hda_codec_realtek 143360 1
snd_hda_codec_generic 94208 1 snd_hda_codec_realtek
ledtrig_audio 16384 2 snd_hda_codec_generic,snd_hda_codec_realtek
intel_rapl_msr 20480 0
intel_rapl_common 28672 1 intel_rapl_msr
nvidia 27746304 25 nvidia_modeset
hid_rmi 24576 0
rmi_core 86016 1 hid_rmi
8250_dw 16384 0
serio 28672 1 rmi_core
mei_hdcp 24576 0
iTCO_wdt 16384 0
iTCO_vendor_support 16384 1 iTCO_wdt
intel_wmi_thunderbolt 20480 0
mxm_wmi 16384 0
ath10k_pci 65536 0
x86_pkg_temp_thermal 20480 0
intel_powerclamp 20480 0
coretemp 20480 0
ath10k_core 602112 1 ath10k_pci
kvm_intel 323584 0
ath 36864 1 ath10k_core
uvcvideo 114688 0
i915 2392064 8
mac80211 974848 1 ath10k_core
videobuf2_vmalloc 20480 1 uvcvideo
kvm 794624 1 kvm_intel
videobuf2_memops 20480 1 videobuf2_vmalloc
snd_hda_intel 53248 6
snd_intel_nhlt 20480 1 snd_hda_intel
videobuf2_v4l2 28672 1 uvcvideo
videobuf2_common 57344 2 videobuf2_v4l2,uvcvideo
btusb 65536 0
snd_hda_codec 159744 4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek
irqbypass 16384 1 kvm
btrtl 24576 1 btusb
rapl 16384 0
videodev 249856 3 videobuf2_v4l2,uvcvideo,videobuf2_common
btbcm 16384 1 btusb
snd_hda_core 102400 5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek
btintel 28672 1 btusb
intel_cstate 16384 0
bluetooth 679936 45 btrtl,btintel,btbcm,bnep,btusb,rfcomm
snd_hwdep 16384 1 snd_hda_codec
i2c_algo_bit 16384 1 i915
intel_uncore 147456 0
cfg80211 843776 3 ath,mac80211,ath10k_core
pcspkr 16384 0
razerkbd 81920 0
mc 61440 4 videodev,videobuf2_v4l2,uvcvideo,videobuf2_common
snd_pcm 143360 4 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_core
ecdh_generic 16384 2 bluetooth
drm_kms_helper 221184 2 nvidia_drm,i915
ecc 32768 1 ecdh_generic
snd_timer 40960 3 snd_seq,snd_hrtimer,snd_pcm
rfkill 28672 8 bluetooth,cfg80211
snd 110592 24 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_pcm
mei_me 45056 1
i2c_i801 36864 0
libarc4 16384 1 mac80211
intel_gtt 24576 1 i915
mei 118784 3 mei_hdcp,mei_me
syscopyarea 16384 1 drm_kms_helper
soundcore 16384 1 snd
intel_lpss_pci 20480 0
sysfillrect 16384 1 drm_kms_helper
intel_lpss 16384 1 intel_lpss_pci
tpm_crb 20480 0
sysimgblt 16384 1 drm_kms_helper
intel_pch_thermal 16384 0
fb_sys_fops 16384 1 drm_kms_helper
idma64 20480 0
i2c_hid 32768 0
battery 20480 0
evdev 28672 21
ac 16384 0
wmi 36864 2 intel_wmi_thunderbolt,mxm_wmi
mac_hid 16384 0
tpm_tis 16384 0
tpm_tis_core 28672 1 tpm_tis
tpm 73728 3 tpm_tis,tpm_crb,tpm_tis_core
rng_core 16384 1 tpm
drm 520192 8 drm_kms_helper,nvidia_drm,i915
sg 40960 0
scsi_mod 253952 1 sg
crypto_user 16384 0
agpgart 53248 2 intel_gtt,drm
ip_tables 36864 0
x_tables 49152 1 ip_tables
ext4 778240 3
crc32c_generic 16384 0
crc16 16384 2 bluetooth,ext4
mbcache 16384 1 ext4
jbd2 131072 1 ext4
dm_snapshot 53248 3
dm_bufio 32768 1 dm_snapshot
hid_generic 16384 0
usbhid 65536 0
hid 143360 6 i2c_hid,usbhid,razerkbd,hid_generic,uhid,hid_rmi
dm_crypt 53248 1
dm_mod 159744 18 dm_crypt,dm_snapshot,dm_bufio
crct10dif_pclmul 16384 1
crc32_pclmul 16384 0
crc32c_intel 24576 6
ghash_clmulni_intel 16384 0
aesni_intel 372736 19
crypto_simd 16384 1 aesni_intel
xhci_pci 20480 0
cryptd 24576 7 crypto_simd,ghash_clmulni_intel
glue_helper 16384 1 aesni_intel
xhci_hcd 278528 1 xhci_pciAny idea about any possible way forward?
Last edited by Rixxo (2021-01-17 16:44:27)
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#2 2021-11-23 07:55:23
- blackout
- Member
- Registered: 2014-05-21
- Posts: 38
Re: Webcam issue black screen
sorry no idea, butmy lenovo just displays a black image and also the ffmpeg capture shows only black video
1 roman@roman ~ % sudo dmesg | grep Camera
[ 1.276570] usb 1-8: Product: Integrated Camera
[ 2.351909] usb 1-8: Found UVC 1.10 device Integrated Camera (04f2:b6be)
[ 2.352809] input: Integrated Camera: Integrated C as /devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/input/input8
[ 2.353188] usb 1-8: Found UVC 1.50 device Integrated Camera (04f2:b6be)
[ 2.353469] input: Integrated Camera: Integrated I as /devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.2/input/input9oman@roman ~ % v4l2-ctl --list-devices
Video Capture 3 (usb-0000:00:14.0-8):
/dev/video0
/dev/video1
/dev/video2
/dev/video3
/dev/media0
/dev/media1roman@roman ~ % lsmod | grep uvc
uvcvideo 147456 0
videobuf2_vmalloc 20480 1 uvcvideo
videobuf2_v4l2 40960 1 uvcvideo
videobuf2_common 86016 4 videobuf2_vmalloc,videobuf2_v4l2,uvcvideo,videobuf2_memops
videodev 307200 3 videobuf2_v4l2,uvcvideo,videobuf2_common
mc Last edited by blackout (2021-11-23 08:01:19)
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