I tried with oneiric live on usb for more than 10 days without reproducing. I figured out that the issue pretty occur on colds boots (and resume from suspend/hibernate). I never had the issue again in precise while it was booted by restarting from oneiric. Then, after finishing the oneiric testings, when the problem occured in precise i tried to restart instead of unplugging and it worked too.
Then i ran new tests with latest saucy live : It never works, even unplugging several times. Logs & infos : $ ls /dev/dvb ls: cannot access /dev/dvb: No such file or directory ubuntu@ubuntu:~$ dmesg | grep dvb [ 109.692860] usbcore: registered new interface driver dvb_usb_af9015 [ 109.693191] usb 1-1.4: dvb_usb_af9015: command failed=170 [ 109.693193] usb 1-1.4: dvb_usb_v2: 'AVerMedia AVerTV DVB-T Volar X' error while loading driver (-5) [ 109.693197] usb 1-1.4: dvb_usb_v2: 'AVerMedia AVerTV DVB-T Volar X' successfully deinitialized and disconnected ubuntu@ubuntu:~$ dmesg | tail -n 50 ... [ 278.691834] usb 1-1.4: USB disconnect, device number 3 [ 280.681194] usb 1-1.4: new high-speed USB device number 6 using ehci-pci [ 280.778167] usb 1-1.4: New USB device found, idVendor=07ca, idProduct=a815 [ 280.778172] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 280.778175] usb 1-1.4: Product: A815 [ 280.778177] usb 1-1.4: Manufacturer: AVerMedia [ 280.778180] usb 1-1.4: SerialNumber: 301262900177000 [ 280.780359] usb 1-1.4: dvb_usb_af9015: command failed=170 [ 280.780365] usb 1-1.4: dvb_usb_v2: 'AVerMedia AVerTV DVB-T Volar X' error while loading driver (-5) [ 280.780374] usb 1-1.4: dvb_usb_v2: 'AVerMedia AVerTV DVB-T Volar X' successfully deinitialized and disconnected [ 280.782416] input: AVerMedia A815 as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.4/1-1.4:1.1/input/input12 [ 280.782701] hid-generic 0003:07CA:A815.0005: input,hidraw0: USB HID v1.01 Keyboard [AVerMedia A815] on usb-0000:00:1a.0-1.4/input1 ubuntu@ubuntu:~$ ls /lib/firmware/dvb-usb-af* /lib/firmware/dvb-usb-af9015.fw ubuntu@ubuntu:~$ dmesg | tail -n 15 ... [ 392.830748] usb 1-1.4: USB disconnect, device number 6 [ 394.565064] usb 1-1.4: new high-speed USB device number 7 using ehci-pci [ 394.662039] usb 1-1.4: New USB device found, idVendor=07ca, idProduct=a815 [ 394.662044] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 394.662047] usb 1-1.4: Product: A815 [ 394.662049] usb 1-1.4: Manufacturer: AVerMedia [ 394.662052] usb 1-1.4: SerialNumber: 301262900177000 [ 394.664157] usb 1-1.4: dvb_usb_af9015: command failed=170 [ 394.664163] usb 1-1.4: dvb_usb_v2: 'AVerMedia AVerTV DVB-T Volar X' error while loading driver (-5) [ 394.664172] usb 1-1.4: dvb_usb_v2: 'AVerMedia AVerTV DVB-T Volar X' successfully deinitialized and disconnected [ 394.666126] input: AVerMedia A815 as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.4/1-1.4:1.1/input/input13 [ 394.666406] hid-generic 0003:07CA:A815.0006: input,hidraw0: USB HID v1.01 Keyboard [AVerMedia A815] on usb-0000:00:1a.0-1.4/input1 ubuntu@ubuntu:~$ uname -a Linux ubuntu 3.11.0-8-generic #15-Ubuntu SMP Fri Sep 20 04:11:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/998360 Title: 07ca:a815 af9015: random detection issue Status in “linux” package in Ubuntu: Incomplete Bug description: The dvb stick identified as af9015 in kernel log (or af9013 in kaffeine) regulary fails to be detected at system startup and need to be unplugged/replugged. Log : kernel: [ 4.458135] af9015: recv bulk message failed:-110 kernel: [ 4.458138] af9015: eeprom read failed:-1 kernel: [ 4.458146] dvb_usb_af9015: probe of 1-1.3:1.0 failed with error -1 After : replug : kernel: [ 262.596415] usb 1-1.3: USB disconnect, device number 3 kernel: [ 264.620038] usb 1-1.3: new high-speed USB device number 6 using ehci_hcd kernel: [ 264.717963] af9015: command failed:170 kernel: [ 265.081985] dvb-usb: found a 'AVerMedia AVerTV DVB-T Volar X' in cold state, will try to load a firmware kernel: [ 265.084535] dvb-usb: downloading firmware from file 'dvb-usb-af9015.fw' kernel: [ 265.152971] dvb-usb: found a 'AVerMedia AVerTV DVB-T Volar X' in warm state. kernel: [ 265.153038] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. kernel: [ 265.153435] DVB: registering new adapter (AVerMedia AVerTV DVB-T Volar X) kernel: [ 265.157163] af9013: firmware version:4.95.0.0 kernel: [ 265.163037] DVB: registering adapter 0 frontend 0 (Afatech AF9013 DVB-T)... kernel: [ 265.164757] MXL5005S: Attached at address 0xc6 kernel: [ 265.187937] Registered IR keymap rc-avermedia-m135a kernel: [ 265.188048] input: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/rc/rc0/input12 kernel: [ 265.188170] rc0: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/rc/rc0 kernel: [ 265.188176] dvb-usb: schedule remote query interval to 500 msecs. kernel: [ 265.188180] dvb-usb: AVerMedia AVerTV DVB-T Volar X successfully initialized and connected. kernel: [ 265.201289] input: AVerMedia A815 as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.1/input/input13 ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-firmware-nonfree 1.11 ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14 Uname: Linux 3.2.0-24-generic x86_64 ApportVersion: 2.0.1-0ubuntu7 Architecture: amd64 Date: Sat May 12 10:03:23 2012 Dependencies: InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) PackageArchitecture: all ProcEnviron: PATH=(custom, no user) LANG=fr_FR.UTF-8 SHELL=/bin/bash SourcePackage: linux-firmware-nonfree UpgradeStatus: No upgrade log present (probably fresh install) --- ApportVersion: 2.12.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 2961 F.... pulseaudio CasperVersion: 1.336 DistroRelease: Ubuntu 13.10 IwConfig: eth0 no wireless extensions. lo no wireless extensions. LiveMediaBuild: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130825) MarkForUpload: True Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet splash -- debian-installer/language=fr keyboard-configuration/layoutcode?=fr keyboard-configuration/variantcode?=oss ProcVersionSignature: Ubuntu 3.11.0-3.8-generic 3.11.0-rc6 RelatedPackageVersions: linux-restricted-modules-3.11.0-3-generic N/A linux-backports-modules-3.11.0-3-generic N/A linux-firmware 1.113 RfKill: Tags: saucy Uname: Linux 3.11.0-3-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 05/23/2011 dmi.bios.vendor: Intel Corp. dmi.bios.version: BLH6710H.86A.0119.2011.0523.1030 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: DH67BL dmi.board.vendor: Intel Corporation dmi.board.version: AAG10189-209 dmi.chassis.type: 3 dmi.modalias: dmi:bvnIntelCorp.:bvrBLH6710H.86A.0119.2011.0523.1030:bd05/23/2011:svn:pn:pvr:rvnIntelCorporation:rnDH67BL:rvrAAG10189-209:cvn:ct3:cvr: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/998360/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp