> > Can you describe the actual problem ? How can you trigger it ? What are > you doing when the problem arises ? Do you hear audio glitches or does > the device disconnect ? Do you have a crash ? Does the *same* device > work on other setups ? > > Try to capture a usbmon trace of the failure, that's likely to help. > > -- Hi, I put in a new kernel and get the response from uname -r of 3.14.0-031400-generic, apologies for the pedantry I am not that sure what I am doing. The device behaves exactly the same as default Linux kernel, buffer is erratic not stable like USB 2.0 and audio droputs every couple of seconds. The HDMI audio output does not work after installing the new kernel. I captured some data with usbmon but its a big file 4MB so I can email it separately if you are interested but a sample is as below. sudo cat /sys/kernel/debug/usb/usbmon/2u > /tmp/1.mon.out Thanks Russel ffff8800d0230400 2003746485 C Zi:2:003:1 0:1:1116:0 1 0:0:3 4 = 00030b00 ffff8800d0230400 2003746493 S Zi:2:003:1 -115:1:1116 1 -18:0:3 4 < ffff8802115e9540 2003746499 C Ii:2:003:3 0:32 2 = 0002 ffff8802115e9540 2003746514 S Ii:2:003:3 -115:32 2 < ffff880036e14600 2003747539 C Zo:2:003:1 0:1:1106:0 5 0:0:264 0:264:264 0:528:264 0:792:264 0:1056:264 1320 > ffff880036e14600 2003747556 S Zo:2:003:1 -115:1:1106 5 -18:0:264 -18:264:270 -18:534:264 -18:798:264 -18:1062:264 1326 = b40e4abb e343b295 4cb72848 bc8d42bd 7341c10b 3ec4943b c2883dc8 9737cc17 ffff8800d0230100 2003747563 C Zi:2:003:1 0:1:1117:0 1 0:0:3 4 = 00030b00 ffff8800d0230100 2003747564 S Zi:2:003:1 -115:1:1117 1 -18:0:3 4 < ffff8800d0237900 2003748552 C Zi:2:003:1 0:1:1118:0 1 0:0:3 4 = 00030b00 ffff8800d0237900 2003748561 S Zi:2:003:1 -115:1:1118 1 -18:0:3 4 < ffff8800d0237600 2003749520 C Zi:2:003:1 0:1:1119:0 1 0:0:3 4 = 00030b00 ffff8800d0237600 2003749526 S Zi:2:003:1 -115:1:1119 1 -18:0:3 4 < ffff8800d0230400 2003750493 C Zi:2:003:1 0:1:1120:0 1 0:0:3 4 = 00030b00 ffff8800d0230400 2003750498 S Zi:2:003:1 -115:1:1120 1 -18:0:3 4 < ffff8800d0230100 2003751518 C Zi:2:003:1 0:1:1121:0 1 0:0:3 4 = 00030b00 ffff8800d0230100 2003751523 S Zi:2:003:1 -115:1:1121 1 -18:0:3 4 < ffff8800d0237900 2003752501 C Zi:2:003:1 0:1:1122:0 1 0:0:3 4 = 00030b00 ffff8800d0237900 2003752506 S Zi:2:003:1 -115:1:1122 1 -18:0:3 4 < ffff880036e15c00 2003753507 C Zo:2:003:1 0:1:1111:0 6 0:0:264 0:264:264 0:528:264 0:792:264 0:1056:264 1584 > ffff880036e15c00 2003753516 S Zo:2:003:1 -115:1:1111 5 -18:0:264 -18:264:264 -18:528:264 -18:792:264 -18:1056:264 1320 = 1537ea16 c9e808b1 f60dd5f1 f7970801 e4fdef09 10fab104 f4e00afb c103fbf6 ffff8800d0237600 2003753520 C Zi:2:003:1 0:1:1123:0 1 0:0:3 4 = 00030b00 ffff8800d0237600 2003753521 S Zi:2:003:1 -115:1:1123 1 -18:0:3 4 < ffff8800d0230400 2003754492 C Zi:2:003:1 0:1:1124:0 1 0:0:3 4 = 00030b00 ffff8800d0230400 2003754494 S Zi:2:003:1 -115:1:1124 1 -18:0:3 4 < ffff8800d0230100 2003755551 C Zi:2:003:1 0:1:1125:0 1 0:0:3 4 = 00030b00 ffff8800d0230100 2003755560 S Zi:2:003:1 -115:1:1125 1 -18:0:3 4 < ffff8800d0237900 2003756552 C Zi:2:003:1 0:1:1126:0 1 0:0:3 4 = 00030b00 ffff8800d0237900 2003756561 S Zi:2:003:1 -115:1:1126 1 -18:0:3 4 < ffff8800d0237600 2003757557 C Zi:2:003:1 0:1:1127:0 1 0:0:3 4 = 00030b00 ffff8800d0237600 2003757565 S Zi:2:003:1 -115:1:1127 1 -18:0:3 4 < ffff880036e14000 2003758499 C Zo:2:003:1 0:1:1116:0 5 0:0:264 0:264:264 0:528:264 0:792:264 0:1056:264 1320 > ffff880036e14000 2003758507 S Zo:2:003:1 -115:1:1116 6 -18:0:264 -18:264:264 -18:528:264 -18:792:264 -18:1056:264 1584 = 1761e712 8ded1cce e21323ec 1264ec08 caf607e0 f7ff1500 0823f703 28fc1409 ffff8800d0230400 2003758511 C Zi:2:003:1 0:1:1128:0 1 0:0:3 4 = 00030b00 ffff8800d0230400 2003758512 S Zi:2:003:1 -115:1:1128 1 -18:0:3 4 < ffff8800d0230100 2003759550 C Zi:2:003:1 0:1:1129:0 1 0:0:3 4 = 00030b00 ffff8800d0230100 2003759559 S Zi:2:003:1 -115:1:1129 1 -18:0:3 4 < ffff8800d0237900 2003760554 C Zi:2:003:1 0:1:1130:0 1 0:0:3 4 = 00030b00 ffff8800d0237900 2003760563 S Zi:2:003:1 -115:1:1130 1 -18:0:3 4 < ffff8800d0237600 2003761552 C Zi:2:003:1 0:1:1131:0 1 0:0:3 4 = 00030b00 ffff8800d0237600 2003761561 S Zi:2:003:1 -115:1:1131 1 -18:0:3 4 < ffff8800d0230400 2003762512 C Zi:2:003:1 0:1:1132:0 1 0:0:3 4 = 00030b00 ffff8800d0230400 2003762515 S Zi:2:003:1 -115:1:1132 1 -18:0:3 4 < ffff880036e14600 2003763509 C Zo:2:003:1 0:1:1121:0 5 0:0:264 0:264:270 0:534:264 0:798:264 0:1062:264 1326 > ffff880036e14600 2003763519 S Zo:2:003:1 -115:1:1121 5 -18:0:264 -18:264:264 -18:528:264 -18:792:264 -18:1056:264 1320 = 26acd81f 9fe02ac2 d423c1db 2f70d027 1fd82b7f d424d5da 28b0d623 35dc2e61 ffff8800d0230100 2003763524 C Zi:2:003:1 0:1:1133:0 1 0:0:3 4 = 00030b00 ffff8800d0230100 2003763526 S Zi:2:003:1 -115:1:1133 1 -18:0:3 4 < ffff8800d0237900 2003764553 C Zi:2:003:1 0:1:1134:0 1 0:0:3 4 = 00030b00 ffff8800d0237900 2003764562 S Zi:2:003:1 -115:1:1134 1 -18:0:3 4 < ffff8800d0237600 2003765552 C Zi:2:003:1 0:1:1135:0 1 0:0:3 4 = 00030b00 ffff8800d0237600 2003765561 S Zi:2:003:1 -115:1:1135 1 -18:0:3 4 < ffff8800d0230400 2003766488 C Zi:2:003:1 0:1:1136:0 1 0:0:3 4 = 00030b00 ffff8800d0230400 2003766494 S Zi:2:003:1 -115:1:1136 1 -18:0:3 4 < ffff8800d0230100 2003767506 C Zi:2:003:1 0:1:1137:0 1 0:0:3 4 = 00030b00 ffff8800d0230100 2003767518 S Zi:2:003:1 -115:1:1137 1 -18:0:3 4 < ffff880036e15c00 2003768475 C Zo:2:003:1 0:1:1127:0 5 0:0:264 0:264:264 0:528:264 0:792:264 0:1056:264 1320 > ffff880036e15c00 2003768487 S Zo:2:003:1 -115:1:1127 5 -18:0:264 -18:264:264 -18:528:270 -18:798:264 -18:1062:264 1326 = eae614ef e70feea1 11f1e40d ecd912f0 9b0ff0d8 0ef3980c f5090af6 7908fb1d ffff8800d0237900 2003768493 C Zi:2:003:1 0:1:1138:0 1 0:0:3 4 = 00030b00 ffff8800d0237900 2003768494 S Zi:2:003:1 -115:1:1138 1 -18:0:3 4 < ffff8800d0237600 2003769508 C Zi:2:003:1 0:1:1139:0 1 0:0:3 4 = 00030b00 ffff8800d0237600 2003769518 S Zi:2:003:1 -115:1:1139 1 -18:0:3 4 < ffff8800d0230400 2003770496 C Zi:2:003:1 0:1:1140:0 1 0:0:3 4 = 00030b00 ffff8800d0230400 2003770499 S Zi:2:003:1 -115:1:1140 1 -18:0:3 4 < ffff8800d0230100 2003771552 C Zi:2:003:1 0:1:1141:0 1 0:0:3 4 = 00030b00 ffff8800d0230100 2003771562 S Zi:2:003:1 -115:1:1141 1 -18:0:3 4 < ffff8800d0237900 2003772551 C Zi:2:003:1 0:1:1142:0 1 0:0:3 4 = 00030b00 ffff8800d0237900 2003772560 S Zi:2:003:1 -115:1:1142 1 -18:0:3 4 < ffff8800d0237600 2003773552 C Zi:2:003:1 0:1:1143:0 1 0:0:3 4 = 00030b00 ffff8800d0237600 2003773560 S Zi:2:003:1 -115:1:1143 1 -18:0:3 4 < ffff880036e14000 2003774499 C Zo:2:003:1 0:1:1132:0 6 0:0:264 0:264:264 0:528:264 0:792:264 0:1056:264 1584 > ffff880036e14000 2003774507 S Zo:2:003:1 -115:1:1132 5 -18:0:264 -18:264:264 -18:528:264 -18:792:264 -18:1056:264 1320 = e34d1cde 4a21e411 1bdf591f e63319e0 c91ee485 1bdd8022 e9a616de b620ef52 ffff8800d0230400 2003774511 C Zi:2:003:1 0:1:1144:0 1 0:0:3 4 = 00030b00 ffff8800d0230400 2003774512 S Zi:2:003:1 -115:1:1144 1 -18:0:3 4 < ffff8800d0230100 2003775519 C Zi:2:003:1 0:1:1145:0 1 0:0:3 4 = 00030b00 ffff8800d0230100 2003775525 S Zi:2:003:1 -115:1:1145 1 -18:0:3 4 < ffff8800d0237900 2003776518 C Zi:2:003:1 0:1:1146:0 1 0:0:3 4 = 00030b00 ffff8800d0237900 2003776523 S Zi:2:003:1 -115:1:1146 1 -18:0:3 4 < ffff8800d0237600 2003777551 C Zi:2:003:1 0:1:1147:0 1 0:0:3 4 = 00030b00 ffff8800d0237600 2003777560 S Zi:2:003:1 -115:1:1147 1 -18:0:3 4 < ffff8800d0230400 2003778553 C Zi:2:003:1 0:1:1148:0 1 0:0:3 4 = 00030b00 ffff8800d0230400 2003778562 S Zi:2:003:1 -115:1:1148 1 -18:0:3 4 < ffff8802115e9540 2003778569 C Ii:2:003:3 0:32 2 = 0002 ffff8802115e9540 2003778583 S Ii:2:003:3 -115:32 2 < ffff880036e14600 2003779478 C Zo:2:003:1 0:1:1137:0 5 0:0:264 0:264:264 0:528:264 0:792:264 0:1056:264 1320 > ffff880036e14600 2003779488 S Zo:2:003:1 -115:1:1137 6 -18:0:264 -18:264:264 -18:528:264 -18:792:264 -18:1056:264 1584 = f0990ff3 c50bf1a7 0ef3b40b f94706f8 a8070682 f9ffc9ff 061bf902 a3fdfbc7 ffff8800d0230100 2003779494 C Zi:2:003:1 0:1:1149:0 1 0:0:3 4 = 00030b00 ffff8800d0230100 2003779495 S Zi:2:003:1 -115:1:1149 1 -18:0:3 4 < ffff8800d0237900 2003780483 C Zi:2:003:1 0:1:1150:0 1 0:0:3 4 = 00030b00 ffff8800d0237900 2003780487 S Zi:2:003:1 -115:1:1150 1 -18:0:3 4 < ffff8800d0237600 2003781482 C Zi:2:003:1 0:1:1151:0 1 0:0:3 4 = 00030b00 ffff8800d0237600 2003781485 S Zi:2:003:1 -115:1:1151 1 -18:0:3 4 < ffff8800d0230400 2003782491 C Zi:2:003:1 0:1:1152:0 1 0:0:3 4 = 00030b00 ffff8800d0230400 2003782495 S Zi:2:003:1 -115:1:1152 1 -18:0:3 4 < ffff8800d0230100 2003783514 C Zi:2:003:1 0:1:1153:0 1 0:0:3 4 = 00030b00 ffff8800d0230100 2003783517 S Zi:2:003:1 -115:1:1153 1 -18:0:3 4 < ffff880036e15c00 2003784498 C Zo:2:003:1 0:1:1142:0 5 0:0:264 0:264:264 0:528:270 0:798:264 0:1062:264 1326 > ffff880036e15c00 2003784504 S Zo:2:003:1 -115:1:1142 5 -18:0:264 -18:264:264 -18:528:264 -18:792:264 -18:1056:264 1320 = f6b708fe 1f01fc0b 0302bdfc 042dfb0a 3df5089e f70f75ef 0615f910 68ee057b ffff8800d0237900 2003784507 C Zi:2:003:1 0:1:1154:0 1 0:0:3 4 = 00030b00 ffff8800d0237900 2003784508 S Zi:2:003:1 -115:1:1154 1 -18:0:3 4 < ffff8800d0237600 2003785519 C Zi:2:003:1 0:1:1155:0 1 0:0:3 4 = 00030b00 ffff8800d0237600 2003785523 S Zi:2:003:1 -115:1:1155 1 -18:0:3 4 < ffff8800d0230400 2003786520 C Zi:2:003:1 0:1:1156:0 1 0:0:3 4 = 00030b00 ffff8800d0230400 2003786524 S Zi:2:003:1 -115:1:1156 1 -18:0:3 4 < ffff8800d0230100 2003787553 C Zi:2:003:1 0:1:1157:0 1 0:0:3 4 = 00030b00 ffff8800d0230100 2003787561 S Zi:2:003:1 -115:1:1157 1 -18:0:3 4 < ffff8800d0237900 2003788553 C Zi:2:003:1 0:1:1158:0 1 0:0:3 4 = 00030b00 ffff8800d0237900 2003788563 S Zi:2:003:1 -115:1:1158 1 -18:0:3 4 < ffff880036e14000 2003789541 C Zo:2:003:1 0:1:1148:0 5 0:0:264 0:264:264 0:528:264 0:792:264 0:1056:264 1320 > ffff880036e14000 2003789555 S Zo:2:003:1 -115:1:1148 5 -18:0:264 -18:264:264 -18:528:270 -18:798:264 -18:1062:264 1326 = 226edc22 15dd20d2 de217cde 1eb5e01f 10e01d6c e11c60e2 22d6dc20 47df236e ffff8800d0237600 2003789560 C Zi:2:003:1 0:1:1159:0 1 0:0:3 4 = 00030b00 ffff8800d0237600 2003789562 S Zi:2:003:1 -115:1:1159 1 -18:0:3 4 < ffff8800d0230400 2003790553 C Zi:2:003:1 0:1:1160:0 1 0:0:3 4 = 00030b00 ffff8800d0230400 2003790562 S Zi:2:003:1 -115:1:1160 1 -18:0:3 4 < ffff8800d0230100 2003791552 C Zi:2:003:1 0:1:1161:0 1 0:0:3 4 = 00030b00 ffff8800d0230100 2003791561 S Zi:2:003:1 -115:1:1161 1 -18:0:3 4 < ffff8800d0237900 2003792552 C Zi:2:003:1 0:1:1162:0 1 0:0:3 4 = 00030b00 ffff8800d0237900 2003792560 S Zi:2:003:1 -115:1:1162 1 -18:0:3 4 < ffff8800d0237600 2003793552 C Zi:2:003:1 0:1:1163:0 1 0:0:3 4 = 00030b00 ffff8800d0237600 2003793561 S Zi:2:003:1 -115:1:1163 1 -18:0:3 4 < ffff8800d0230400 2003794554 C Zi:2:003:1 0:1:1164:0 1 0:0:3 4 = 00030b00 ffff8800d0230400 2003794563 S Zi:2:003:1 -115:1:1164 1 -18:0:3 4 < ffff880036e14600 2003795541 C Zo:2:003:1 0:1:1153:0 6 0:0:264 0:264:264 0:528:264 0:792:264 0:1056:264 1584 > ffff880036e14600 2003795555 S Zo:2:003:1 -115:1:1153 5 -18:0:264 -18:264:264 -18:528:264 -18:792:264 -18:1056:264 1320 = 11d0ed0f 02f00cf0 f20e6ff0 0c89f30f 12f00ecd f00e33f1 0ca9f30a 1af5086d ffff8800d0230100 2003795561 C Zi:2:003:1 0:1:1165:0 1 0:0:3 4 = 00030b00 ffff8800d0230100 2003795562 S Zi:2:003:1 -115:1:1165 1 -18:0:3 4 < ffff8800d0237900 2003796552 C Zi:2:003:1 0:1:1166:0 1 0:0:3 4 = 00030b00 ffff8800d0237900 2003796561 S Zi:2:003:1 -115:1:1166 1 -18:0:3 4 < ffff8800d0237600 2003797552 C Zi:2:003:1 0:1:1167:0 1 0:0:3 4 = 00030b00 ffff8800d0237600 2003797560 S Zi:2:003:1 -115:1:1167 1 -18:0:3 4 < -- 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
