Re: uvcvideo stopped working in 4.16

2018-04-07 Thread Damjan Georgievski
On 7 April 2018 at 11:11, Hans Verkuil  wrote:
> On 06/04/18 18:54, Damjan Georgievski wrote:
>> Since the 4.16 kernel my uvcvideo webcam on Thinkpad X1 Carbon (5th
>> gen) stopped working with gst-launch-1.0, kamoso (kde webcam app),
>> Firefox and Chromium on sites like appear.in, talky.io, Google
>> Hangouts and meet.jit.si.
>
> Do you see a /dev/v4l-touchX (X is probably 0) device? If so, then this
> patch will probably fix the issue:
>
> https://patchwork.linuxtv.org/patch/48417/
>
> It will appear in a stable 4.16 release soon.

Thanks Hans,
that patch indeed fixes my issue


-- 
damjan


Re: uvcvideo stopped working in 4.16

2018-04-07 Thread Hans Verkuil
On 06/04/18 18:54, Damjan Georgievski wrote:
> Since the 4.16 kernel my uvcvideo webcam on Thinkpad X1 Carbon (5th
> gen) stopped working with gst-launch-1.0, kamoso (kde webcam app),
> Firefox and Chromium on sites like appear.in, talky.io, Google
> Hangouts and meet.jit.si.

Do you see a /dev/v4l-touchX (X is probably 0) device? If so, then this
patch will probably fix the issue:

https://patchwork.linuxtv.org/patch/48417/

It will appear in a stable 4.16 release soon.

Regards,

Hans

> 
> It works fine in 4.15
> 
> The camera is:
> Bus 001 Device 004: ID 04f2:b5ce Chicony Electronics Co., Ltd
> 
> After further investigation, if I rmmod the uvcvideo module, and then
> load it again, the camera starts working normally. But I get this in
> dmesg:
> 
> [   63.399362] usbcore: deregistering interface driver uvcvideo
> [   63.495659] WARNING: CPU: 1 PID: 858 at
> drivers/media/v4l2-core/v4l2-dev.c:176 v4l2_device_release+0xe3/0x100
> [videodev]
> [   63.495662] Modules linked in: rfcomm joydev mousedev rmi_smbus
> rmi_core bnep snd_hda_codec_hdmi snd_soc_skl snd_soc_skl_ipc
> snd_hda_codec_conexant snd_hda_ext_core snd_hda_codec_generic
> snd_soc_sst_dsp snd_soc_sst_ipc snd_soc_acpi snd_soc_core snd_compress
> ac97_bus snd_pcm_dmaengine arc4 iTCO_wdt iTCO_vendor_support wmi_bmof
> intel_wmi_thunderbolt intel_rapl iwlmvm x86_pkg_temp_thermal
> intel_powerclamp coretemp kvm_intel snd_hda_intel mac80211
> snd_hda_codec kvm uvcvideo(-) btusb btrtl btbcm btintel snd_hda_core
> videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 iwlwifi
> videobuf2_common bluetooth snd_hwdep irqbypass e1000e intel_cstate
> snd_pcm videodev intel_uncore qcserial intel_rapl_perf cdc_mbim ptp
> usb_wwan psmouse pps_core snd_timer usbserial input_leds media pcspkr
> cdc_wdm cdc_ncm cfg80211 usbnet
> [   63.495758]  mii i2c_i801 rtsx_pci_ms memstick tpm_crb ecdh_generic
> mei_me mei shpchp intel_pch_thermal ucsi_acpi typec_ucsi thinkpad_acpi
> typec wmi nvram i2c_hid ac rfkill snd battery soundcore led_class
> tpm_tis rtc_cmos tpm_tis_core hid tpm evdev rng_core mac_hid
> usbip_host usbip_core sg scsi_mod crypto_user ip_tables x_tables ext4
> crc16 mbcache jbd2 fscrypto algif_skcipher af_alg dm_crypt dm_mod
> crct10dif_pclmul crc32_pclmul crc32c_intel rtsx_pci_sdmmc
> ghash_clmulni_intel pcbc serio_raw mmc_core atkbd libps2 xhci_pci
> aesni_intel aes_x86_64 xhci_hcd crypto_simd glue_helper cryptd usbcore
> rtsx_pci usb_common i8042 serio vfat fat i915 intel_gtt i2c_algo_bit
> drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm
> agpgart
> [   63.495882] CPU: 1 PID: 858 Comm: rmmod Not tainted 4.16.0+ #1
> [   63.495885] Hardware name: LENOVO 20HQS0LV00/20HQS0LV00, BIOS
> N1MET45W (1.30 ) 02/22/2018
> [   63.495899] RIP: 0010:v4l2_device_release+0xe3/0x100 [videodev]
> [   63.495903] RSP: 0018:9c974505bd60 EFLAGS: 00010202
> [   63.495907] RAX:  RBX: 97d00b84a1d0 RCX: 
> 
> [   63.495910] RDX: 97d00b84a018 RSI: 0286 RDI: 
> c0c7f0e0
> [   63.495912] RBP: 97d008245ae0 R08:  R09: 
> 
> [   63.495915] R10: c823d22a9a00 R11:  R12: 
> 97d00b84a019
> [   63.495917] R13: 97d008245b90 R14: 97d00cbaf8f8 R15: 
> 
> [   63.495921] FS:  7f3549e74b80() GS:97d01f48()
> knlGS:
> [   63.495924] CS:  0010 DS:  ES:  CR0: 80050033
> [   63.495928] CR2: 01bffe78 CR3: 00047d4e2003 CR4: 
> 003606e0
> [   63.495930] Call Trace:
> [   63.495947]  device_release+0x30/0x90
> [   63.495958]  kobject_put+0x85/0x1a0
> [   63.495967]  uvc_unregister_video+0x49/0x90 [uvcvideo]
> [   63.495995]  usb_unbind_interface+0x85/0x280 [usbcore]
> [   63.496007]  device_release_driver_internal+0x15a/0x220
> [   63.496014]  driver_detach+0x37/0x70
> [   63.496021]  bus_remove_driver+0x51/0xd0
> [   63.496051]  usb_deregister+0x6a/0xd0 [usbcore]
> [   63.496065]  uvc_cleanup+0xc/0x36e [uvcvideo]
> [   63.496075]  SyS_delete_module+0x16a/0x2d0
> [   63.496088]  do_syscall_64+0x74/0x190
> [   63.496100]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
> [   63.496105] RIP: 0033:0x7f35495975d7
> [   63.496108] RSP: 002b:7ffcbf653b88 EFLAGS: 0206 ORIG_RAX:
> 00b0
> [   63.496112] RAX: ffda RBX:  RCX: 
> 7f35495975d7
> [   63.496115] RDX: 000a RSI: 0800 RDI: 
> 01bf57b8
> [   63.496117] RBP: 01bf5750 R08: 7ffcbf652b01 R09: 
> 
> [   63.496119] R10: 08b2 R11: 0206 R12: 
> 7ffcbf655d95
> [   63.496123] R13:  R14: 01bf5750 R15: 
> 01bf5260
> [   63.496127] Code: da ce 48 85 ed 74 1f 5b 48 89 ef 5d 41 5c e9 f5
> 6b 00 00 5b 5d 41 5c e9 6c 9c da ce 4c 89 e7 e8 04 80 f4 ff eb c6 5b
> 5d 41 5c c3 <0f> 0b 5b 5d 41 5c 48 c7 c7 e0 f0 c7 c0 e9 cb e8 ac ce 90
> 66 2e
> [   63.496214] ---[ end