> Date: Wed, 28 May 2014 10:56:51 +0200 > From: hverkuil@xxxxxxxxx > To: searchfgold67899@xxxxxxxx; linux-usb@xxxxxxxxxxxxxxx; linux-media@xxxxxxxxxxxxxxx > Subject: Re: 1d6b:0001 [MSI A55M-P33] No webcam functionality with Zoran Microelectronics, Ltd Digital Camera EX-20 DSC > > On 05/27/14 19:55, Richie Gress wrote: >> >> >>> Date: Tue, 27 May 2014 09:03:33 +0200 >>> From: hverkuil@xxxxxxxxx >>> To: searchfgold67899@xxxxxxxx; linux-usb@xxxxxxxxxxxxxxx; linux-media@xxxxxxxxxxxxxxx >>> Subject: Re: 1d6b:0001 [MSI A55M-P33] No webcam functionality with Zoran Microelectronics, Ltd Digital Camera EX-20 DSC >>> >>> On 05/27/2014 03:34 AM, Richie wrote: >>>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1322380 >>>> >>>> [1.] One line summary of the problem: >>>> >>>> 1d6b:0001 [MSI A55M-P33] No webcam functionality with Zoran Microelectronics, >>>> Ltd Digital Camera EX-20 DSC >>>> >>>> [2.] Full description of the problem/report: >>>> >>>> No software recognizes the webcam and this is not a regression. dmesg reports >>>> the following additional output after plugging the camera. You can see where I >>>> change the camera to "PC Mode" (in order to use the webcam, users must do this >>>> from the camera) at [ 691.147589]. The device is turned off at [ 1094.746444]: >>>> >>>> [ 688.796908] usb 4-2: new full-speed USB device number 2 using ohci-pci >>>> [ 688.965802] usb 4-2: New USB device found, idVendor=0595, idProduct=2002 >>>> [ 688.965807] usb 4-2: New USB device strings: Mfr=4, Product=5, >>>> SerialNumber=6 >>>> [ 688.965809] usb 4-2: Product: COACH DSC >>>> [ 688.965811] usb 4-2: Manufacturer: ZORAN >>>> [ 688.965813] usb 4-2: SerialNumber: ZORAN01234567 >>>> [ 689.012630] usb-storage 4-2:1.0: USB Mass Storage device detected >>>> [ 689.021168] scsi6 : usb-storage 4-2:1.0 >>>> [ 689.021266] usbcore: registered new interface driver usb-storage >>>> [ 690.030971] scsi 6:0:0:0: Direct-Access ZORAN COACH6 (I62) 1.10 PQ: 0 ANSI: >>>> 0 CCS >>>> [ 690.036147] sd 6:0:0:0: Attached scsi generic sg3 type 0 >>>> [ 690.044964] sd 6:0:0:0: [sdc] 3962629 512-byte logical blocks: (2.02 GB/1.88 >>>> GiB) >>>> [ 690.054977] sd 6:0:0:0: [sdc] Write Protect is off >>>> [ 690.054984] sd 6:0:0:0: [sdc] Mode Sense: 00 06 00 00 >>>> [ 690.064965] sd 6:0:0:0: [sdc] No Caching mode page found >>>> [ 690.064971] sd 6:0:0:0: [sdc] Assuming drive cache: write through >>>> [ 690.108960] sd 6:0:0:0: [sdc] No Caching mode page found >>>> [ 690.108966] sd 6:0:0:0: [sdc] Assuming drive cache: write through >>>> [ 690.156970] sdc: >>>> [ 690.210974] sd 6:0:0:0: [sdc] No Caching mode page found >>>> [ 690.210980] sd 6:0:0:0: [sdc] Assuming drive cache: write through >>>> [ 690.210985] sd 6:0:0:0: [sdc] Attached SCSI removable disk >>>> [ 691.147589] usb 4-2: USB disconnect, device number 2 >>>> [ 691.793364] usb 4-2: new full-speed USB device number 3 using ohci-pci >>>> [ 691.962202] usb 4-2: New USB device found, idVendor=0595, idProduct=4343 >>>> [ 691.962207] usb 4-2: New USB device strings: Mfr=7, Product=8, >>>> SerialNumber=9 >>>> [ 691.962209] usb 4-2: Product: COACH DSC >>>> [ 691.962211] usb 4-2: Manufacturer: ZORAN >>>> [ 691.962213] usb 4-2: SerialNumber: ZORAN00000001 >>>> [ 691.964262] usb-storage 4-2:1.0: USB Mass Storage device detected >>>> [ 691.965410] usb-storage: probe of 4-2:1.0 failed with error -5 >>>> [ 692.053929] Linux video capture interface: v2.00 >>>> [ 692.091447] zr364xx 4-2:1.0: Zoran 364xx compatible webcam plugged >>>> [ 692.091453] zr364xx 4-2:1.0: model 0595:4343 detected >>>> [ 692.091461] usb 4-2: 320x240 mode selected >>>> [ 692.094356] usb 4-2: Zoran 364xx controlling device video0 >>> >>> Clearly the webcam is recognized and a /dev/video0 node is created. >>> Please check that /dev/video0 exists. Try e.g. v4l2-ctl -D -d /dev/video0, >>> it should list it as using the zr364xx driver. >>> >>> So what exactly doesn't work? >>> >>> Regards, >>> >>> Hans >>> >>>> [ 692.094672] usbcore: registered new interface driver zr364xx >>>> [ 1094.746444] hub 4-0:1.0: port 2 disabled by hub (EMI?), re-enabling... >>>> [ 1094.746451] usb 4-2: USB disconnect, device number 3 >>>> [ 1094.747395] zr364xx 4-2:1.0: Zoran 364xx webcam unplugged >>> >> >> Yes, it does seem to be using the zr364xx driver: >> >> $ v4l2-ctl -D -d /dev/video0 >> Driver Info (not using libv4l2): >> Driver name : Zoran 364xx >> Card type : COACH DSC >> Bus info : 4-1 >> Driver version: 3.15.0 >> Capabilities : 0x85000001 >> Video Capture >> Read/Write >> Streaming >> Device Capabilities >> Device Caps : 0x05000001 >> Video Capture >> Read/Write >> Streaming >> >> The exact problem is that while the camera is recognized as a camera by software like Skype, Kamoso, and Cheese, there is no picture, just black. A "320x240 mode" was mentioned... perhaps that resolution is just too small to use by the software? > > Try using qv4l2. If that doesn't work, then it is likely to be a driver issue. > I have one zr364xx based camera and I can try it tomorrow or during the weekend. > It used to work, but it's been a long time since I tried it. On the other hand, > nobody did any work on that driver for a long time. > > Regards, > > Hans It does smell like a driver issue, as you say. qv4l2 give me this output in the terminal and a blank window for the picture: libv4l2: error setting pixformat: Timer expired Set Capture Format: Timer expired Cheese gives me this and an error that indicated lack of ability to connect to the webcam: $ cheese libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy libv4l2: error setting pixformat: Device or resource busy (cheese:5100): cheese-WARNING **: Device '/dev/video0' is busy: gstv4l2object.c(2524): gst_v4l2_object_set_format (): /GstCameraBin:camerabin/GstWrapperCameraBinSrc:camera_source/GstBin:bin17/GstV4l2Src:video_source: Call to S_FMT failed for YU12 @ 320x240: Device or resource busy -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
