[Bug 1763748] [NEW] Integrated Webcam Realtek Integrated_Webcam_HD (0bda:58f4) not working in DELL XPS 13 9370 with firmware 1.50

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You have been subscribed to a public bug by Walter Garcia-Fontes (walter-garcia):

===SRU Justification===
[Impact]
UVC1.5 Realtek webcam on XPS 9370 does not work.

[Test]
Both the bug reporter and I can confirm the patch from Realtek works.

[Fix]
Use correct version control length for UVC1.5.

[Regression Potential]
Low. This only affects UVC1.5 webcams, which is quite rare in the wild.

===Original Bug Report===
The webcam is detected by the system, but no applications detect it.

sudo lsusb -v: (relevant part)
Bus 001 Device 002: ID 0bda:58f4 Realtek Semiconductor Corp.
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.01
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  idVendor           0x0bda Realtek Semiconductor Corp.
  idProduct          0x58f4
  bcdDevice           72.79
  iManufacturer           3 CN0FFMHCLOG0081SB0M1A01
  iProduct                1 Integrated_Webcam_HD
  iSerial                 2 200901010001

In syslog (firmware can be seen in first line - 1.50):
Apr 13 12:36:25 XPS-13-9370 kernel: [    2.126546] uvcvideo: Found UVC 1.50 device Integrated_Webcam_HD (0bda:58f4)
Apr 13 12:36:25 XPS-13-9370 kernel: [    2.126908] usbcore: registered new interface driver btusb
Apr 13 12:36:25 XPS-13-9370 kernel: [    2.127128] uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. Enabling workaround.
Apr 13 12:36:25 XPS-13-9370 kernel: [    2.127462] uvcvideo: Failed to query (129) UVC probe control : -75 (exp. 34).
Apr 13 12:36:25 XPS-13-9370 kernel: [    2.127464] uvcvideo: Failed to initialize the device (-5).
Apr 13 12:36:25 XPS-13-9370 kernel: [    2.128061] uvcvideo: Unknown video format 00000032-0002-0010-8000-00aa00389b71
Apr 13 12:36:25 XPS-13-9370 kernel: [    2.128065] uvcvideo: Found UVC 1.50 device Integrated_Webcam_HD (0bda:58f4)

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-13-generic 4.15.0-13.14 [modified: boot/vmlinuz-4.15.0-13-generic]
ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
Uname: Linux 4.15.0-13-generic x86_64
ApportVersion: 2.20.9-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  wgarcia    2145 F.... pulseaudio
CurrentDesktop: Unity:Unity7:ubuntu
Date: Fri Apr 13 16:59:02 2018
HibernationDevice: RESUME=UUID=a6f64150-e0a5-4c6b-9097-b8f98b14bdcc
InstallationDate: Installed on 2018-04-09 (4 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180408)
MachineType: Dell Inc. XPS 13 9370
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-13-generic.efi.signed root=UUID=226e4127-5c15-4a18-8062-74ba83b57515 ro quiet splash vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-13-generic N/A
 linux-backports-modules-4.15.0-13-generic  N/A
 linux-firmware                             1.173
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/21/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.2.1
dmi.board.name: 0F6P3V
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.2.1:bd02/21/2018:svnDellInc.:pnXPS139370:pvr:rvnDellInc.:rn0F6P3V:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 13 9370
dmi.sys.vendor: Dell Inc.

** Affects: dell-sputnik
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu)
     Importance: Medium
         Status: Confirmed


** Tags: amd64 apport-bug bionic kernel-bug-exists-upstream-4.17.rc1
-- 
Integrated Webcam Realtek Integrated_Webcam_HD (0bda:58f4) not working in DELL XPS 13 9370 with firmware 1.50
https://bugs.launchpad.net/bugs/1763748
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