On tor, 2016-10-20 at 13:10 +0300, Max Savenkov wrote: > After tacking a few pictures, camera in my Meizu MX4 Ubuntu Edition > locks up, i.e. Camera App displays black screen, and if I try to > restart it, it says that this app does not have permission to access > camera. Rebooting the device helps, but only for a few more snaps. > > It seems to happen randomly, sometimes only after a second photo, and > sometimes after 10th or so. It seems to be linked to locking the > device when the camera is on, or maybe switching to other apps, or a > combination of these behaviours, but I'm not sure. > > I can reproduce this behaviour with some effort, so I took a look at > dmesg output on the phone, but I'm not sure I see antyhing > incriminating. The log seems to be the same for "healthy" photo and > for "broken" one, both containing a fair number of error messages > > [mt-i2c]ERROR,454: id=0,addr: 54, transfer error > [mt-i2c]ERROR,460: I2C_ACKERR > [CAM_CAL] I2C send read address failed!! > [CAM_CAL]I2C read liteon e2prom failed!! > > The only thing I have is that I see a lot more mt-i2c errors after > bugged photo: > > [ 496.276011] [LC898212XD] LC898212XD_Release - Start > [ 496.276018] [LC898212XD] LC898212XD_Release - End > [ 496.334223] [ion_dbg] warning: free_list_size=0xc862000 > [ 496.347719] [ion_dbg] warning: free_list_size=0xc862000 > [ 496.559796] [mt-i2c]ERROR,454: id=0,addr: 54, transfer error > [ 496.559832] [mt-i2c]ERROR,460: I2C_ACKERR > [ 496.560223] [mt-i2c]ERROR,454: id=0,addr: 54, transfer error > [ 496.560241] [mt-i2c]ERROR,460: I2C_ACKERR > [ 496.705554] [mt-i2c]ERROR,454: id=0,addr: 37, transfer error > [ 496.705591] [mt-i2c]ERROR,460: I2C_ACKERR > [ 496.705686] [mt-i2c]ERROR,454: id=0,addr: 37, transfer error > > What other diagnostic can I gather before submitting a bug? > -- > Hi, are these failed pics by any chance HDR? See https://bugs.launchpad.net /ubuntu/+source/camera-app/+bug/1537774 R
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