On Monday, October 25, 2010 06:35:05 pm Alan Stern did opine: > On Mon, 25 Oct 2010, gene heskett wrote: > > Hi folks; > > > > I have an elderly labtec webcan, usb interface that can run > > (theoretically) in 640x480 as well as 320x240. Plugged directly into > > a motherboard breakout port, it runs well at 320x240, but if I select > > 640x480 in cheese, it only works for about 15% of a frame and errors > > out with hundreds of these lines in the terminal window I launched it > > from: > > > > libv4lconvert: Error decompressing JPEG: fill_nbits error: need 7 more > > bits libv4lconvert: Error decompressing JPEG: fill_nbits error: need > > 3 more bits libv4lconvert: Error decompressing JPEG: fill_nbits > > error: need 4 more bits libv4lconvert: Error decompressing JPEG: > > fill_nbits error: need 2 more bits > > > > The driver appears to be the (from lsmod) > > gspca_zc3xx 34210 0 > > gspca_main 17233 1 gspca_zc3xx > > > > From dmesg: > > [gene@coyote log]$ grep gspca dmesg > > gspca: main v2.10.0 registered > > gspca: probing 046d:08a2 > > gspca: video0 created > > > > I can make it work about 90% of the time when booted to 2.6.35.7, but > > its a 100% failure with 2.6.36 until I select 320x240. > > > > Is there anything I can do? > > Did you build the kernel with CONFIG_USB_DEBUG? No, the last time I did that, several kernel versions back I had a 2Gb messages file in 10 minutes. A bit much IMO. > Did you check the > dmesg log? Yes, more of the same I believe, but lemme check. All I can see ATM is megabytes of this: sd 10:0:0:3: __pm_runtime_resume() returns 1! sd 10:0:0:1: __pm_runtime_resume()! sd 10:0:0:1: __pm_runtime_resume() returns 1! sd 10:0:0:0: __pm_runtime_resume()! sd 10:0:0:0: __pm_runtime_resume() returns 1! scsi host4: __pm_runtime_resume()! scsi host4: __pm_runtime_resume() returns 1! scsi host4: __pm_runtime_resume()! scsi host4: __pm_runtime_resume() returns 1! scsi host4: __pm_runtime_resume()! > Did you post to the linux-media mailing list? I'm not subscribed. To me, it looks like a usb problem. > Alan Stern -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Even historians fail to learn from history -- they repeat the same mistakes. -- John Gill, "Patterns of Force", stardate 2534.7 -- 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
