On Thu, Jul 8, 2010 at 6:14 AM, Jean-Francois Moine <moinejf@xxxxxxx> wrote: > Strange! Well, I put the change my test version. May you get this one > from my web page and test it? Okay, now I've exhausted the quick fixes that you've suggested and have come to a new conclusion. Without modifying the value in "gspca_dev->nbalt" the drivers will report "bandwidth not wide enough - trying again". Modifying this value to subtract between 1 and 8 seems to eliminate this bandwidth error. However, the results ultimately stay the same as before where there is video and no audio for decreasing "gspca_dev->nbalt" from 0-5. Video input stops working after decreasing by 6-8 while still breaking the audio input, except for decreasing by 8 where the video breaks and audio remains...due to a "no transfer endpoint found" message. My conclusion, reducing "gspca_dev->nbalt" by values 1-5 apparently fix the bandwidth issue and don't alter the video input. However, they also do not correct the issue where the microphone breaks and becomes disabled. Below is a log that I kept of each test, compiling the changes, rebooting, testing and recording, then repeating for each decrement. ------------------------------------- gspca_dev->nbalt -= 0; /* or same as no change */ Initial startup (audio works) $ dmesg | grep "gspca" [ 21.268018] gspca: main v2.9.0 registered [ 21.268850] gspca-2.9.50: probing 045e:00f7 [ 21.285392] gspca-2.9.50: video0 created [ 21.285395] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.285413] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.285419] gspca-2.9.50: 045e:00f7 bad interface 2 Started Cheese (video works, no audio) $ dmesg | grep "gspca" [ 21.268018] gspca: main v2.9.0 registered [ 21.268850] gspca-2.9.50: probing 045e:00f7 [ 21.285392] gspca-2.9.50: video0 created [ 21.285395] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.285413] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.285419] gspca-2.9.50: 045e:00f7 bad interface 2 [ 158.861671] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 160.405694] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 160.405698] gspca-2.9.50: bandwidth not wide enough - trying again [ 160.434684] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 175.635876] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 gspca_dev->nbalt -= 1; Initial startup (audio works) $ dmesg | grep "gspca" [ 21.905722] gspca: main v2.9.0 registered [ 21.915236] gspca-2.9.50: probing 045e:00f7 [ 21.931505] gspca-2.9.50: video0 created [ 21.931508] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.931528] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.931536] gspca-2.9.50: 045e:00f7 bad interface 2 Started Cheese (video works, no audio) $ dmesg | grep "gspca" [ 21.905722] gspca: main v2.9.0 registered [ 21.915236] gspca-2.9.50: probing 045e:00f7 [ 21.931505] gspca-2.9.50: video0 created [ 21.931508] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.931528] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.931536] gspca-2.9.50: 045e:00f7 bad interface 2 [ 188.170963] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 188.170963] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 gspca_dev->nbalt -= 2; Initial startup (audio works) $ dmesg | grep "gspca" [ 22.463556] gspca: main v2.9.0 registered [ 22.466506] gspca-2.9.50: probing 045e:00f7 [ 22.483436] gspca-2.9.50: video0 created [ 22.483438] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 22.483458] gspca-2.9.50: 045e:00f7 bad interface 1 [ 22.483465] gspca-2.9.50: 045e:00f7 bad interface 2 Started Cheese (video works, no audio) $ dmesg | grep "gspca" [ 22.463556] gspca: main v2.9.0 registered [ 22.466506] gspca-2.9.50: probing 045e:00f7 [ 22.483436] gspca-2.9.50: video0 created [ 22.483438] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 22.483458] gspca-2.9.50: 045e:00f7 bad interface 1 [ 22.483465] gspca-2.9.50: 045e:00f7 bad interface 2 [ 139.718647] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 147.487578] gspca-2.9.50: frame overflow 234239 > 233472 [ 158.147090] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 gspca_dev->nbalt -= 3; Initial startup (audio works) $ dmesg | grep "gspca" [ 21.295529] gspca: main v2.9.0 registered [ 21.296266] gspca-2.9.50: probing 045e:00f7 [ 21.321505] gspca-2.9.50: video0 created [ 21.321508] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.321528] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.321536] gspca-2.9.50: 045e:00f7 bad interface 2 Started Cheese (video works, no audio) $ dmesg | grep "gspca" [ 21.295529] gspca: main v2.9.0 registered [ 21.296266] gspca-2.9.50: probing 045e:00f7 [ 21.321505] gspca-2.9.50: video0 created [ 21.321508] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.321528] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.321536] gspca-2.9.50: 045e:00f7 bad interface 2 [ 130.140725] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 138.444830] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 gspca_dev->nbalt -= 4; Initial startup (audio works) $ dmesg | grep "gspca" [ 21.775525] gspca: main v2.9.0 registered [ 21.776456] gspca-2.9.50: probing 045e:00f7 [ 21.793435] gspca-2.9.50: video0 created [ 21.793438] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.793455] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.793463] gspca-2.9.50: 045e:00f7 bad interface 2 Started Cheese (video works, no audio) $ dmesg | grep "gspca" [ 21.775525] gspca: main v2.9.0 registered [ 21.776456] gspca-2.9.50: probing 045e:00f7 [ 21.793435] gspca-2.9.50: video0 created [ 21.793438] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.793455] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.793463] gspca-2.9.50: 045e:00f7 bad interface 2 [ 102.566613] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 107.669128] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 gspca_dev->nbalt -= 5; Initial startup (audio works) $ dmesg | grep "gspca" [ 21.150636] gspca: main v2.9.0 registered [ 21.151538] gspca-2.9.50: probing 045e:00f7 [ 21.174690] gspca-2.9.50: video0 created [ 21.174692] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.174710] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.174717] gspca-2.9.50: 045e:00f7 bad interface 2 Started Cheese (video works, no audio) $ dmesg | grep "gspca" [ 21.150636] gspca: main v2.9.0 registered [ 21.151538] gspca-2.9.50: probing 045e:00f7 [ 21.174690] gspca-2.9.50: video0 created [ 21.174692] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.174710] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.174717] gspca-2.9.50: 045e:00f7 bad interface 2 [ 103.857992] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 108.318804] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 gspca_dev->nbalt -= 6; Initial startup (audio works) $ dmesg | grep "gspca" [ 21.719670] gspca: main v2.9.0 registered [ 21.720735] gspca-2.9.50: probing 045e:00f7 [ 21.741407] gspca-2.9.50: video0 created [ 21.741409] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.741425] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.741433] gspca-2.9.50: 045e:00f7 bad interface 2 Started Cheese (no video, no audio) $ dmesg | grep "gspca" [ 21.719670] gspca: main v2.9.0 registered [ 21.720735] gspca-2.9.50: probing 045e:00f7 [ 21.741407] gspca-2.9.50: video0 created [ 21.741409] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.741425] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.741433] gspca-2.9.50: 045e:00f7 bad interface 2 [ 86.749179] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 98.646330] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 gspca_dev->nbalt -= 7; Initial startup (audio works) $ dmesg | grep "gspca" [ 21.911549] gspca: main v2.9.0 registered [ 21.912648] gspca-2.9.50: probing 045e:00f7 [ 21.934429] gspca-2.9.50: video0 created [ 21.934431] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.934452] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.934460] gspca-2.9.50: 045e:00f7 bad interface 2 Started Cheese (no video, no audio) $ dmesg | grep "gspca" [ 21.911549] gspca: main v2.9.0 registered [ 21.912648] gspca-2.9.50: probing 045e:00f7 [ 21.934429] gspca-2.9.50: video0 created [ 21.934431] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.934452] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.934460] gspca-2.9.50: 045e:00f7 bad interface 2 [ 108.513126] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 121.592828] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 gspca_dev->nbalt -= 8; Initial startup (audio works) $ dmesg | grep "gspca" [ 21.215610] gspca: main v2.9.0 registered [ 21.217198] gspca-2.9.50: probing 045e:00f7 [ 21.233435] gspca-2.9.50: video0 created [ 21.233437] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.233459] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.233467] gspca-2.9.50: 045e:00f7 bad interface 2 Started Cheese (no video, audio works) $ dmesg | grep "gspca" [ 21.215610] gspca: main v2.9.0 registered [ 21.217198] gspca-2.9.50: probing 045e:00f7 [ 21.233435] gspca-2.9.50: video0 created [ 21.233437] gspca-2.9.50: found int in endpoint: 0x83, buffer_len=1, interval=100 [ 21.233459] gspca-2.9.50: 045e:00f7 bad interface 1 [ 21.233467] gspca-2.9.50: 045e:00f7 bad interface 2 [ 85.830434] gspca: no transfer endpoint found ------------------------------------- The point of breaking the microphone appears to be at the same instance that the second "found int in endpoint: 0x83, buffer_len=1, interval=100" occurs. This is in the alloc_and_submit_int_urb() function in gspca.c. Is there any way that I can do a deeper trace on this to find what is actually going wrong here? Does this help at all? Thanks. -- Kyle Baker -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
