Re: Dell XPS 12 USB camera bulk mode issues

Mark Ryan <mark.d.ryan@xxxxxxxxxxxxxxx> · Fri, 28 Feb 2014 10:34:24 +0100

Hi Laurent,

On 02/26/2014 04:40 PM, Laurent Pinchart wrote:
Hi Mark,

[ ... ]

With the information I've given you, could you try to log more information in
the driver to try and find what goes wrong ? You could for instance log the
content of each header at the beginning of the uvc_video_decode_start()
function.

So maybe I have something here.  I ran guvcview and set the format to 
MJPEG running at a high resolution.  I'm using the kernel 3.11.0-17 that 
comes with Ubuntu 13.10.  In the usbmon logs I see the following.

[...]

SETUP Host-to-device Class request to Interface
bRequest: SET CUR (01)
wValue: 0200
wIndex: INTF 1 ENTITY 0 (0001)	
wLength: 001a

26 data bytes

bmHint                         0x01
bFormatIndex                      2
bFrameIndex                      10
dwFrameInterval              333333
wKeyFrameRate                     0
wPFrameRate                       0
wCompQuality                      0
wCompWindowSize                   0
wDelay                           32
dwMaxVideoFrameSize         1843200
dwMaxPayloadTransferSize      34816

Note the dwMaxPayloadTransferSize of 34816

[...]

Now I have my first payload

16384 data bytes

0c8d863e 8c007d67    .†>Œ.}g
8e00b304 ffd8ffdb    Ž.³.ÿØÿÛ
00430003 02020202    .C......
02030202 02030303    ........

16384 data bytes

fbf5aeff 00c25e12    ûõ®ÿ.Â^.
5d1244d5 353b2437    ].DÕ5;$7
f92d06e6 24c28475    ù-.æ$Â„u
c740c6b3 8bbb29ad    Ç@Æ³‹»)

16384 data bytes

f1a3cc60 b8200c52    ñ£Ì`¸ .R
0108eac3 1cd4610e    ..êÃ.Ôa.
ece45032 40c477a8    ìäP2@Äw¨
e4f35b81 d05001fc    äó[ÐP.ü

16384 data bytes

fb3528d1 bc4fcc56    û5(Ñ¼OÌV
fe2d9522 1d04b1e7    þ-•"..±ç
3fa1a9e5 2b9867f6    ?¡©å+˜gö
778e2dd0 7d9b57b5    wŽ-Ð}›Wµ

16384 data bytes

c016baf6 99732c9a    À.ºö™s,š
9db39b7b e6b995a4    ³›{æ¹•¤
65751f78 649eb5ed    eu.xdžµí
9e2dfdb1 355fd9fa    ž-ý±5_Ùú

16384 data bytes

a73d4053 8fad795c    §=@Sy\
c9088170 ec1c1e54    É.pì..T
9ce6a59a d89f5742    œæ¥šØŸWB
82cf3297 26d95b18    ‚Ï2—&Ù[.

16384 data bytes

b4d3b21b d4a53595    ´Ó².Ô¥5•
99cac904 2e1bb346    ™ÊÉ...³F
09fe555e 4d2b4b95    .þU^M+K•
be6b488a 0e91b0ca    ¾kHŠ.‘°Ê	

16384 data bytes

3adb9dbc 6323ad21    :Û¼c#!
8aa85b9d b934d31e    Š¨[¹4Ó.
465885f6 a00ad25c    FX…ö .Ò\
04fdd44b be43d08a    .ýÔK¾CÐŠ

16384 data bytes

14f1cf4c 0ae43589    .ñÏL.ä5‰
0acdbd0b c8afedc2    .Í½.È¯íÂ
f15d4339 8bfb5b2b    ñ]C9‹û[+
df39e42d 14ecb849    ß9ä-.ì¸I

10466 data bytes

7fffd1fc af99e466    ÿÑü¯™äf
c39cd475 cab500a2    ÃœÔuÊµ.¢
ad8ae147 d295ec0c    ŠáGÒ•ì.
bd639196 3cfa0ad5    ½c‘–<ú.Õ

14 data bytes

0c8f863e 8c000fd7    .†>Œ..×
9300cb04 ffd9        “.Ë.ÿÙ

The problem seems to be that the payload sent by the camera is much 
larger than dwMaxPayloadTransferSize.  For this reason the driver 
assumes that it has found the end of the frame after processing the 
third URB.   This test is performed at the bottom of 
uvc_video_decode_bulk.  It then expects URB 4 to be the start of a new 
frame, which it isn't, and so it gets out of sync.  If I understand 
correctly, dwMaxPayloadTransferSize is set by the camera, so perhaps the 
camera is at fault here.

Interestingly, I checked some wireshark logs I took while using the 
camera with the Dell XPS12 booted into Windows and I see the exact same 
thing.  The dwMaxPayloadTransferSize is set to 34816, but the payloads 
were much larger, around 140kb.  As the camera works fine on Windows, 
I'm guessing Windows is not relying on the dwMaxPayloadTransferSize to 
detect the end of a payload.  Perhaps it just uses the FID.  Does this 
sound plausible?  If so, I might see if I can replicate this behaviour 
locally, to see if it solves the issue.

[   80.490256] uvcvideo: Frame complete (FID bit toggled).
[   80.490262] uvcvideo: frame 2080 stats: 0/0/1 packets, 0/0/0 pts (!early
!initial), 0/1 scr, last pts/stc/sof 0/2069725020/32605 [   80.490264]
uvcvideo: Marking buffer as bad (error bit set).
[   80.490606] uvcvideo: Frame complete (EOF found).
[   80.490942] uvcvideo: Marking buffer as bad (error bit set).
[   80.490947] uvcvideo: Dropping payload (out of sync).
[   80.492920] uvcvideo: Marking buffer as bad (error bit set).
[   80.492927] uvcvideo: Dropping payload (out of sync).
[   80.495352] uvcvideo: frame 2081 stats: 0/0/3 packets, 0/0/1 pts (!early
!initial), 2/3 scr, last pts/stc/sof 2103017049/2069659484/32604 [
80.495360] uvcvideo: Marking buffer as bad (error bit set).
[   80.496066] uvcvideo: Marking buffer as bad (error bit set).
[   80.498021] uvcvideo: frame 2082 stats: 0/0/2 packets, 1/1/2 pts (!early
initial), 1/2 scr, last pts/stc/sof 2103148379/2103148379/32601 [
80.498030] uvcvideo: Marking buffer as bad (error bit set).
[   80.498033] uvcvideo: Frame complete (FID bit toggled).
[   80.498039] uvcvideo: frame 2083 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2103213661/2103213661/32349 [
80.498042] uvcvideo: Marking buffer as bad (error bit set).
[   80.500420] uvcvideo: Marking buffer as bad (error bit set).
[   80.501122] uvcvideo: Marking buffer as bad (error bit set).
[   80.502742] uvcvideo: Frame complete (EOF found).
[   80.503095] uvcvideo: frame 2084 stats: 0/0/3 packets, 1/1/2 pts (!early
initial), 2/3 scr, last pts/stc/sof 2102754899/2069659484/32604 [
80.503100] uvcvideo: Marking buffer as bad (error bit set).
[   80.505510] uvcvideo: Marking buffer as bad (error bit set).
[   80.505890] uvcvideo: Frame complete (EOF found).
[   80.506245] uvcvideo: frame 2085 stats: 0/0/2 packets, 1/1/2 pts (!early
initial), 1/2 scr, last pts/stc/sof 2119532118/2119532118/32341 [
80.506249] uvcvideo: Marking buffer as bad (error bit set).
[   80.507845] uvcvideo: Frame complete (EOF found).
[   80.508187] uvcvideo: Marking buffer as bad (error bit set).
[   80.508191] uvcvideo: Dropping payload (out of sync).
[   80.510747] uvcvideo: frame 2086 stats: 0/0/2 packets, 0/0/1 pts (!early
initial), 1/2 scr, last pts/stc/sof 2137357669/2085781330/32594 [
80.510752] uvcvideo: Marking buffer as bad (error bit set).
[   80.511463] uvcvideo: frame 2087 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2081456144/2081456144/32784 [
80.511471] uvcvideo: Marking buffer as bad (error bit set).
[   80.511474] uvcvideo: Frame complete (FID bit toggled).
[   80.511480] uvcvideo: frame 2088 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2102493775/2102559313/33362 [
80.511483] uvcvideo: Marking buffer as bad (error bit set).
[   80.513895] uvcvideo: frame 2089 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2102493775/2102559313/33362 [
80.513904] uvcvideo: Marking buffer as bad (error bit set).
[   80.513907] uvcvideo: Frame complete (FID bit toggled).
[   80.513913] uvcvideo: frame 2090 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2086567773/2086502238/32605 [
80.513916] uvcvideo: Marking buffer as bad (error bit set).
[   80.514608] uvcvideo: frame 2091 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2086567773/2086502238/32605 [
80.514617] uvcvideo: Marking buffer as bad (error bit set).
[   80.514620] uvcvideo: Frame complete (FID bit toggled).
[   80.514626] uvcvideo: frame 2092 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2102754901/2102754901/32341 [
80.514629] uvcvideo: Marking buffer as bad (error bit set).
[   80.517141] uvcvideo: Marking buffer as bad (error bit set).
[   80.517858] uvcvideo: Marking buffer as bad (error bit set).
[   80.520396] uvcvideo: frame 2093 stats: 0/0/3 packets, 2/2/3 pts (!early
initial), 2/3 scr, last pts/stc/sof 2098429971/2098692119/32792 [
80.520404] uvcvideo: Marking buffer as bad (error bit set).
[   80.520407] uvcvideo: Frame complete (FID bit toggled).
[   80.520413] uvcvideo: frame 2094 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2081456656/2081456656/33296 [
80.520416] uvcvideo: Marking buffer as bad (error bit set).
[   80.521111] uvcvideo: frame 2095 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2081456656/2081456656/33296 [
80.521119] uvcvideo: Marking buffer as bad (error bit set).
[   80.521122] uvcvideo: Frame complete (FID bit toggled).
[   80.521128] uvcvideo: frame 2096 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2102951768/2102820696/32598 [
80.521131] uvcvideo: Marking buffer as bad (error bit set).
[   80.523496] uvcvideo: frame 2097 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2102951768/2102820696/32598 [
80.523505] uvcvideo: Marking buffer as bad (error bit set).
[   80.523508] uvcvideo: Frame complete (FID bit toggled).
[   80.523514] uvcvideo: frame 2098 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2119794008/2119728472/32088 [
80.523517] uvcvideo: Marking buffer as bad (error bit set).
[   80.523831] uvcvideo: Frame complete (EOF found).
[   80.525463] uvcvideo: Dropping payload (out of sync).
[   80.526190] uvcvideo: frame 2099 stats: 0/0/2 packets, 1/1/2 pts (!early
initial), 1/2 scr, last pts/stc/sof 96354447/97436625/437 [   80.526199]
uvcvideo: Marking buffer as bad (error bit set).
[   80.528590] uvcvideo: Marking buffer as bad (error bit set).
[   80.530563] uvcvideo: Marking buffer as bad (error bit set).
[   80.531249] uvcvideo: frame 2100 stats: 0/0/3 packets, 2/2/3 pts (!early
initial), 2/3 scr, last pts/stc/sof 2102558546/2102624083/32595 [
80.531258] uvcvideo: Marking buffer as bad (error bit set).
[   80.531261] uvcvideo: Frame complete (FID bit toggled).
[   80.531267] uvcvideo: frame 2101 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2119401555/2119401555/32851 [
80.531270] uvcvideo: Marking buffer as bad (error bit set).
[   80.533319] uvcvideo: Frame complete (EOF found).
[   80.533683] uvcvideo: frame 2102 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2119401555/2119401555/32851 [
80.533692] uvcvideo: Marking buffer as bad (error bit set).
[   80.535641] uvcvideo: Marking buffer as bad (error bit set).
[   80.536353] uvcvideo: Marking buffer as bad (error bit set).
[   80.538778] uvcvideo: frame 2103 stats: 0/0/3 packets, 2/2/3 pts (!early
initial), 2/3 scr, last pts/stc/sof 2102361937/2102361935/32591 [
80.538787] uvcvideo: Marking buffer as bad (error bit set).
[   80.538790] uvcvideo: Frame complete (FID bit toggled).
[   80.538796] uvcvideo: frame 2104 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2117435189/2100657973/32567 [
80.538799] uvcvideo: Marking buffer as bad (error bit set).
[   80.539116] uvcvideo: Frame complete (EOF found).
[   80.540751] uvcvideo: Marking buffer as bad (error bit set).
[   80.540758] uvcvideo: Dropping payload (out of sync).
[   80.542582] uvcvideo: frame 2105 stats: 0/0/2 packets, 1/1/2 pts (!early
initial), 1/2 scr, last pts/stc/sof 2119270481/2119336018/32850 [
80.542593] uvcvideo: Marking buffer as bad (error bit set).
[   80.543286] uvcvideo: Marking buffer as bad (error bit set).
[   80.545268] uvcvideo: Marking buffer as bad (error bit set).
[   80.547699] uvcvideo: frame 2106 stats: 0/0/3 packets, 2/2/3 pts (!early
initial), 2/3 scr, last pts/stc/sof 2101378880/2101247806/32574 [
80.547707] uvcvideo: Marking buffer as bad (error bit set).
[   80.547710] uvcvideo: Frame complete (FID bit toggled).
[   80.547716] uvcvideo: frame 2107 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2118811466/2101903434/32840 [
80.547719] uvcvideo: Marking buffer as bad (error bit set).
[   80.548047] uvcvideo: Frame complete (EOF found).
[   80.548394] uvcvideo: Marking buffer as bad (error bit set).
[   80.548401] uvcvideo: Dropping payload (out of sync).
[   80.550362] uvcvideo: frame 2108 stats: 0/0/2 packets, 1/1/2 pts (!early
initial), 1/2 scr, last pts/stc/sof 2085125960/2085060423/32582 [
80.550371] uvcvideo: Marking buffer as bad (error bit set).
[   80.552830] uvcvideo: Marking buffer as bad (error bit set).
[   80.553372] uvcvideo: Marking buffer as bad (error bit set).
[   80.561825] uvcvideo: Marking buffer as bad (error bit set).
[   80.562162] uvcvideo: Frame complete (EOF found).
[   80.562497] uvcvideo: Marking buffer as bad (error bit set).
[   80.562505] uvcvideo: Dropping payload (out of sync).
[   80.564927] uvcvideo: frame 2109 stats: 0/0/6 packets, 3/3/4 pts (!early
initial), 5/6 scr, last pts/stc/sof 97857347/2068480074/32842 [
80.564935] uvcvideo: Marking buffer as bad (error bit set).
[   80.566925] uvcvideo: frame 2110 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2069069907/2069069907/32851 [
80.566934] uvcvideo: Marking buffer as bad (error bit set).
[   80.566937] uvcvideo: Frame complete (FID bit toggled).
[   80.566943] uvcvideo: frame 2111 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2102558546/2102493009/32593 [
80.566946] uvcvideo: Marking buffer as bad (error bit set).
[   80.567599] uvcvideo: frame 2112 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2102558546/2102493009/32593 [
80.567607] uvcvideo: Frame complete (FID bit toggled).
[   80.567613] uvcvideo: frame 2113 stats: 0/0/1 packets, 0/0/0 pts (!early
!initial), 0/0 scr, last pts/stc/sof 0/0/0 [   80.570041] uvcvideo: frame
2114 stats: 0/0/1 packets, 0/0/0 pts (!early !initial), 0/0 scr, last
pts/stc/sof 0/0/0 [   80.570050] uvcvideo: Marking buffer as bad (error bit
set).
[   80.570053] uvcvideo: Frame complete (FID bit toggled).
[   80.570059] uvcvideo: frame 2115 stats: 0/0/1 packets, 0/0/0 pts (!early
!initial), 0/1 scr, last pts/stc/sof 0/2068938833/32849 [   80.570062]
uvcvideo: Marking buffer as bad (error bit set).
[   80.570379] uvcvideo: Frame complete (EOF found).
[   80.572032] uvcvideo: frame 2116 stats: 0/0/1 packets, 0/0/0 pts (!early
!initial), 0/1 scr, last pts/stc/sof 0/2068938833/32849 [   80.572041]
uvcvideo: Marking buffer as bad (error bit set).
[   80.572713] uvcvideo: Marking buffer as bad (error bit set).
[   80.575138] uvcvideo: Marking buffer as bad (error bit set).
[   80.577804] uvcvideo: frame 2117 stats: 0/0/4 packets, 2/2/3 pts (!early
initial), 2/3 scr, last pts/stc/sof 2084667459/2084470848/32830 [
80.577813] uvcvideo: Marking buffer as bad (error bit set).
[   80.577816] uvcvideo: Frame complete (FID bit toggled).
[   80.577822] uvcvideo: frame 2118 stats: 0/0/1 packets, 0/0/0 pts (!early
!initial), 0/1 scr, last pts/stc/sof 0/2069004371/32851 [   80.577825]
uvcvideo: Marking buffer as bad (error bit set).
[   80.578143] uvcvideo: Frame complete (EOF found).
[   80.580219] uvcvideo: Marking buffer as bad (error bit set).
[   80.580223] uvcvideo: Dropping payload (out of sync).
[   80.582212] uvcvideo: frame 2119 stats: 0/0/2 packets, 0/0/0 pts (!early
!initial), 1/2 scr, last pts/stc/sof 0/2069266518/32854 [   80.582221]
uvcvideo: Marking buffer as bad (error bit set).
[   80.582896] uvcvideo: frame 2120 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2086371163/2086371163/32604 [
80.582904] uvcvideo: Marking buffer as bad (error bit set).
[   80.582907] uvcvideo: Frame complete (FID bit toggled).
[   80.582913] uvcvideo: frame 2121 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2102951768/2102951768/32600 [
80.582916] uvcvideo: Marking buffer as bad (error bit set).
[   80.584748] uvcvideo: Marking buffer as bad (error bit set).
[   80.586723] uvcvideo: frame 2122 stats: 0/0/2 packets, 0/0/1 pts (!early
initial), 1/2 scr, last pts/stc/sof 2102951768/2036039771/32859 [
80.586731] uvcvideo: Marking buffer as bad (error bit set).
[   80.586734] uvcvideo: Frame complete (FID bit toggled).
[   80.586740] uvcvideo: frame 2123 stats: 0/0/1 packets, 0/0/0 pts (!early
!initial), 0/1 scr, last pts/stc/sof 0/2052489304/32856 [   80.586743]
uvcvideo: Marking buffer as bad (error bit set).
[   80.587067] uvcvideo: Frame complete (EOF found).
[   80.588555] uvcvideo: Marking buffer as bad (error bit set).
[   80.588564] uvcvideo: Dropping payload (out of sync).
[   80.590556] uvcvideo: Marking buffer as bad (error bit set).
[   80.590564] uvcvideo: Dropping payload (out of sync).
[   80.591231] uvcvideo: Marking buffer as bad (error bit set).
[   80.591239] uvcvideo: Dropping payload (out of sync).
[   80.593662] uvcvideo: frame 2124 stats: 0/0/4 packets, 2/3/3 pts (!early
!initial), 3/4 scr, last pts/stc/sof 2086240088/2086240089/32601 [
80.593670] uvcvideo: Marking buffer as bad (error bit set).
[   80.593995] uvcvideo: Frame complete (EOF found).
[   80.595639] uvcvideo: Marking buffer as bad (error bit set).
[   80.595646] uvcvideo: Dropping payload (out of sync).
[   80.596344] uvcvideo: frame 2125 stats: 0/0/2 packets, 0/0/1 pts (!early
!initial), 1/2 scr, last pts/stc/sof 2081456144/2081456144/32784 [
80.596353] uvcvideo: Marking buffer as bad (error bit set).
[   80.598768] uvcvideo: frame 2126 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2086371161/2086240091/32601 [
80.598776] uvcvideo: Marking buffer as bad (error bit set).
[   80.598779] uvcvideo: Frame complete (FID bit toggled).
[   80.598785] uvcvideo: frame 2127 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2103213916/2103279453/32605 [
80.598788] uvcvideo: Marking buffer as bad (error bit set).
[   80.600741] uvcvideo: frame 2128 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2103213916/2103279453/32605 [
80.600749] uvcvideo: Marking buffer as bad (error bit set).
[   80.600753] uvcvideo: Frame complete (FID bit toggled).
[   80.600758] uvcvideo: frame 2129 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2102755157/2102624085/32595 [
80.600761] uvcvideo: Marking buffer as bad (error bit set).
[   80.601436] uvcvideo: Marking buffer as bad (error bit set).
[   80.603280] uvcvideo: frame 2130 stats: 0/0/2 packets, 1/1/2 pts (!early
initial), 1/2 scr, last pts/stc/sof 2086502237/2086502237/32605 [
80.603288] uvcvideo: Marking buffer as bad (error bit set).
[   80.603291] uvcvideo: Frame complete (FID bit toggled).
[   80.603297] uvcvideo: frame 2131 stats: 0/0/1 packets, 0/0/0 pts (!early
!initial), 0/1 scr, last pts/stc/sof 0/2066711095/33331 [   80.603300]
uvcvideo: Marking buffer as bad (error bit set).
[   80.604922] uvcvideo: Frame complete (EOF found).
[   80.605261] uvcvideo: frame 2132 stats: 0/0/1 packets, 0/0/0 pts (!early
!initial), 0/1 scr, last pts/stc/sof 0/2066711095/33331 [   80.605270]
uvcvideo: Marking buffer as bad (error bit set).
[   80.605627] uvcvideo: Frame complete (EOF found).
[   80.605982] uvcvideo: frame 2133 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2119532117/2119597654/32342 [
80.605990] uvcvideo: Marking buffer as bad (error bit set).
[   80.608029] uvcvideo: Frame complete (EOF found).
[   80.608384] uvcvideo: Marking buffer as bad (error bit set).
[   80.608391] uvcvideo: Dropping payload (out of sync).
[   80.610344] uvcvideo: Marking buffer as bad (error bit set).
[   80.610353] uvcvideo: Dropping payload (out of sync).
[   80.612192] uvcvideo: Marking buffer as bad (error bit set).
[   80.612196] uvcvideo: Dropping payload (out of sync).
[   80.612941] uvcvideo: Marking buffer as bad (error bit set).
[   80.612948] uvcvideo: Dropping payload (out of sync).
[   80.615462] uvcvideo: Marking buffer as bad (error bit set).
[   80.615469] uvcvideo: Dropping payload (out of sync).
[   80.616182] uvcvideo: Marking buffer as bad (error bit set).
[   80.616190] uvcvideo: Dropping payload (out of sync).
[   80.618717] uvcvideo: frame 2134 stats: 0/0/7 packets, 4/6/5 pts (!early
initial), 6/7 scr, last pts/stc/sof 2102296398/2102165324/32588 [
80.618726] uvcvideo: Marking buffer as bad (error bit set).
[   80.619425] uvcvideo: Marking buffer as bad (error bit set).
[   80.621815] uvcvideo: frame 2135 stats: 0/0/2 packets, 1/1/2 pts (!early
initial), 1/2 scr, last pts/stc/sof 2081456656/2081456656/33296 [
80.621824] uvcvideo: Marking buffer as bad (error bit set).
[   80.621827] uvcvideo: Frame complete (FID bit toggled).
[   80.621834] uvcvideo: frame 2136 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2102820693/2102820694/32600 [
80.621837] uvcvideo: Marking buffer as bad (error bit set).
[   80.623785] uvcvideo: Marking buffer as bad (error bit set).
[   80.626895] uvcvideo: Marking buffer as bad (error bit set).
[   80.628846] uvcvideo: Marking buffer as bad (error bit set).
[   80.630705] uvcvideo: Marking buffer as bad (error bit set).
[   80.632698] uvcvideo: frame 2137 stats: 0/0/6 packets, 5/5/6 pts (!early
initial), 5/6 scr, last pts/stc/sof 2102558546/2102558546/32594 [
80.632706] uvcvideo: Marking buffer as bad (error bit set).
[   80.632709] uvcvideo: Frame complete (FID bit toggled).
[   80.632715] uvcvideo: frame 2138 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2119336019/2102558802/32850 [
80.632718] uvcvideo: Marking buffer as bad (error bit set).
[   80.633058] uvcvideo: Frame complete (EOF found).
[   80.633403] uvcvideo: frame 2139 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2119336019/2102558802/32850 [
80.633412] uvcvideo: Marking buffer as bad (error bit set).
[   80.635832] uvcvideo: Marking buffer as bad (error bit set).
[   80.637813] uvcvideo: Marking buffer as bad (error bit set).
[   80.638509] uvcvideo: frame 2140 stats: 0/0/3 packets, 2/2/3 pts (!early
initial), 2/3 scr, last pts/stc/sof 2102493009/2102493009/32593 [
80.638523] uvcvideo: Marking buffer as bad (error bit set).
[   80.638527] uvcvideo: Frame complete (FID bit toggled).
[   80.638537] uvcvideo: frame 2141 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2117435445/2100723765/32824 [
80.638541] uvcvideo: Marking buffer as bad (error bit set).
[   80.638817] uvcvideo: Frame complete (EOF found).
[   80.641019] uvcvideo: Marking buffer as bad (error bit set).
[   80.641028] uvcvideo: Dropping payload (out of sync).
[   80.641709] uvcvideo: frame 2142 stats: 0/0/2 packets, 1/1/2 pts (!early
initial), 1/2 scr, last pts/stc/sof 2102362191/2102493265/32847 [
80.641719] uvcvideo: Marking buffer as bad (error bit set).
[   80.644143] uvcvideo: Marking buffer as bad (error bit set).
[   80.646129] uvcvideo: Marking buffer as bad (error bit set).
[   80.646798] uvcvideo: Marking buffer as bad (error bit set).
[   80.649234] uvcvideo: frame 2143 stats: 0/0/4 packets, 3/3/4 pts (!early
initial), 3/4 scr, last pts/stc/sof 2101903432/2102034506/32844 [
80.649243] uvcvideo: Marking buffer as bad (error bit set).
[   80.649247] uvcvideo: Frame complete (FID bit toggled).
[   80.649254] uvcvideo: frame 2144 stats: 0/0/1 packets, 0/0/1 pts (!early
initial), 0/1 scr, last pts/stc/sof 2085060423/2084994887/32582 [
80.649256] uvcvideo: Marking buffer as bad (error bit set).

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