Created attachment 949583 [details] Sample of corrupt image Description of problem: My USB microscope is generally well-supported by uvcvideo. However when pointed at a complex subject (such as mouse mat) that presumably doesn't JPEG down well, the resulting image gets corrupted (see attachment). Only part of the frame is present and the rest is grey. [ 153.532316] usb 2-1.2: new high-speed USB device number 3 using ehci-pci [ 153.652548] usb 2-1.2: New USB device found, idVendor=0ac8, idProduct=3420 [ 153.652560] usb 2-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 153.652566] usb 2-1.2: Product: Venus USB2.0 Camera [ 153.652571] usb 2-1.2: Manufacturer: Vimicro Corp. [ 153.654646] uvcvideo: Found UVC 1.00 device Venus USB2.0 Camera (0ac8:3420) [ 153.658557] input: Venus USB2.0 Camera as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/input/input19 There are no other error messages. I don't observe this under Windows 7, so I think the hardware's OK. Version-Release number of selected component (if applicable): kernel-3.17.1-302.fc21.x86_64 libv4l-1.6.0-1.fc21.x86_64 How reproducible: Always. Steps to Reproduce: 1. Point microscope at a complex image that (presumably) doesn't compress well. 2. Observe results on screen. Actual results: Stream corrupted, as shown in upload. Expected results: Nice images. Additional info:
*********** MASS BUG UPDATE ************** We apologize for the inconvenience. There are a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 21 kernel bugs. Fedora 21 has now been rebased to 3.18.3-201.fc21. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel. If you experience different issues, please open a new bug report for those.
Still present in kernel-3.18.3-201.fc21.x86_64
*********** MASS BUG UPDATE ************** We apologize for the inconvenience. There is a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 21 kernel bugs. Fedora 21 has now been rebased to 3.19.5-200.fc21. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel. If you have moved on to Fedora 22, and are still experiencing this issue, please change the version to Fedora 22. If you experience different issues, please open a new bug report for those.
still present in kernel-3.19.4-200.fc21.x86_64
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still present in kernel-4.2.5-300.fc23.x86_64
*********** MASS BUG UPDATE ************** We apologize for the inconvenience. There is a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 23 kernel bugs. Fedora 23 has now been rebased to 4.7.4-100.fc23. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel. If you have moved on to Fedora 24 or 25, and are still experiencing this issue, please change the version to Fedora 24 or 25. If you experience different issues, please open a new bug report for those.
*********** MASS BUG UPDATE ************** This bug is being closed with INSUFFICIENT_DATA as there has not been a response in 4 weeks. If you are still experiencing this issue, please reopen and attach the relevant data from the latest kernel you are running and any data that might have been requested previously.
I've just seen this on Win10 using their generic uvcvideo driver. Seems like something about the hardware is not entirely compliant.