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Not sure if this helps with troubleshooting, but I threw the flirc into an ubuntu VM, installed the application [v1.2.6] and attempted a force upgrade. There's an I/O error in the console output right after the firmware update, I assume this is part of the issue. Note: Running as root root@ubuntu:~# Flirc fl_open_devices(344): trying to open: 20A0 :: flirc.tv [D] fl_open_devices(390): 1d6b:0002 (bus 1, device 1) [D] fl_open_devices(390): 20a0:0001 (bus 2, device 7) [D] fl_open_devices(433): Vendor: flirc.tv [D] fl_open_devices(453): [Vendor Match] fl_open_devices(461): usb port:2 [D] fl_open_devices(390): 0e0f:0008 (bus 2, device 4) [D] fl_open_devices(390): 0e0f:0002 (bus 2, device 3) [D] fl_open_devices(390): 0e0f:0003 (bus 2, device 2) [D] fl_open_devices(390): 1d6b:0001 (bus 2, device 1) [D] fl_open_device(135): Firmware v:2.6 [D] determine_iface(46): fw_state: firmware [D] determine_iface(47): version: 2.6 [D] determine_iface(99): initializing fw ver2.6 CheckFirmwareVersion(402): hw version: 2.6 CheckFirmwareVersion(403): emb version: 2.600000 [D] checkHardwareStatus(170): state: normal [D] checkHardwareStatus(170): state: normal [D] checkHardwareStatus(170): state: normal [D] checkHardwareStatus(170): state: normal [V] fw_upg_clicked(144): force fw upgrade clicked [V] force_update(338): force update slot [D] checkHardwareStatus(170): state: normal [D] checkHardwareStatus(170): state: normal [D] checkHardwareStatus(170): state: normal [D] checkHardwareStatus(170): state: normal [D] checkHardwareStatus(170): state: normal [D] do_embedded_upgrade(376): trying upgrade[D] fl_send_msg(164): Input/output error [D] do_embedded_upgrade(379): device was not in bootloader, closing fl_close_device(330): closing device handle [DEVICE] Waiting fl_open_devices(344): trying to open: 20A0 :: flirc.tv [D] fl_open_devices(390): 1d6b:0002 (bus 1, device 1) [D] fl_open_devices(390): 20a0:0001 (bus 2, device 7) [E] fl_open_devices(428): Cannot query device, is the GUI open? [D] fl_open_devices(390): 0e0f:0008 (bus 2, device 4) [D] fl_open_devices(390): 0e0f:0002 (bus 2, device 3) [D] fl_open_devices(390): 0e0f:0003 (bus 2, device 2) [D] fl_open_devices(390): 1d6b:0001 (bus 2, device 1) fl_open_devices(344): trying to open: 20A0 :: claylogic.com [D] fl_open_devices(390): 1d6b:0002 (bus 1, device 1) [D] fl_open_devices(390): 20a0:0001 (bus 2, device 7) [D] fl_open_devices(390): 0e0f:0008 (bus 2, device 4) [D] fl_open_devices(390): 0e0f:0002 (bus 2, device 3) [D] fl_open_devices(390): 0e0f:0003 (bus 2, device 2) [D] fl_open_devices(390): 1d6b:0001 (bus 2, device 1) [D] _fl_open_device(491): No devices found [D] fl_open_device(123): no device found . fl_open_devices(344): trying to open: 20A0 :: flirc.tv [D] fl_open_devices(390): 1d6b:0002 (bus 1, device 1) [D] fl_open_devices(390): 20a0:0001 (bus 2, device 7) [E] fl_open_devices(428): Cannot query device, is the GUI open? [D] fl_open_devices(390): 0e0f:0008 (bus 2, device 4) [D] fl_open_devices(390): 0e0f:0002 (bus 2, device 3) [D] fl_open_devices(390): 0e0f:0003 (bus 2, device 2) [D] fl_open_devices(390): 1d6b:0001 (bus 2, device 1) fl_open_devices(344): trying to open: 20A0 :: claylogic.com [D] fl_open_devices(390): 1d6b:0002 (bus 1, device 1) [D] fl_open_devices(390): 20a0:0001 (bus 2, device 7) [D] fl_open_devices(390): 0e0f:0008 (bus 2, device 4) [D] fl_open_devices(390): 0e0f:0002 (bus 2, device 3) [D] fl_open_devices(390): 0e0f:0003 (bus 2, device 2) [D] fl_open_devices(390): 1d6b:0001 (bus 2, device 1) [D] _fl_open_device(491): No devices found [D] fl_open_device(123): no device found . fl_open_devices(344): trying to open: 20A0 :: flirc.tv [D] fl_open_devices(390): 20a0:0000 (bus 2, device 8) [D] fl_open_devices(390): 1d6b:0002 (bus 1, device 1) [D] fl_open_devices(390): 0e0f:0008 (bus 2, device 4) [D] fl_open_devices(390): 0e0f:0002 (bus 2, device 3) [D] fl_open_devices(390): 0e0f:0003 (bus 2, device 2) [D] fl_open_devices(390): 1d6b:0001 (bus 2, device 1) fl_open_devices(344): trying to open: 20A0 :: claylogic.com [D] fl_open_devices(390): 20a0:0000 (bus 2, device 8) fl_open_devices(407): claiming interface 0 [D] fl_open_devices(433): Vendor: claylogic.com [D] fl_open_devices(453): [Vendor Match] fl_open_devices(461): usb port:2 [D] fl_open_devices(474): bootloader found [D] fl_open_devices(390): 1d6b:0002 (bus 1, device 1) [D] fl_open_devices(390): 0e0f:0008 (bus 2, device 4) [D] fl_open_devices(390): 0e0f:0002 (bus 2, device 3) [D] fl_open_devices(390): 0e0f:0003 (bus 2, device 2) [D] fl_open_devices(390): 1d6b:0001 (bus 2, device 1) [D] fl_open_device(133): Bootloader v:1.4 [D] determine_iface(46): fw_state: bootloader [D] determine_iface(47): version: 1.4 [D] determine_iface(51): initializing btldr ver1 [DEVICE] Bootloader Detected [D] do_embedded_upgrade(387): using legacy image fl_upgrade_fw_ext(899): bootloader open [DEVICE] Uploading [D] fl_ver1_get_dev_info(109): size of data returned: 7 [D] fl_ver1_get_dev_info(110): page size: 128 [D] fl_ver1_get_dev_info(111): device size: 32767 fl_ver1_pre_boot(197): settings: B3 [========================================>] 100% [D] fl_send_msg(164): Input/output error fl_close_device(330): closing device handle [DEVICE] Waiting fl_open_devices(344): trying to open: 20A0 :: flirc.tv [D] fl_open_devices(390): 20a0:0000 (bus 2, device 8) [D] fl_open_devices(390): 1d6b:0002 (bus 1, device 1) [D] fl_open_devices(390): 0e0f:0008 (bus 2, device 4) [D] fl_open_devices(390): 0e0f:0002 (bus 2, device 3) [D] fl_open_devices(390): 0e0f:0003 (bus 2, device 2) [D] fl_open_devices(390): 1d6b:0001 (bus 2, device 1) fl_open_devices(344): trying to open: 20A0 :: claylogic.com [D] fl_open_devices(390): 20a0:0000 (bus 2, device 8) fl_open_devices(407): claiming interface 0 [E] fl_open_devices(428): Cannot query device, is the GUI open? [D] fl_open_devices(390): 1d6b:0002 (bus 1, device 1) [D] fl_open_devices(390): 0e0f:0008 (bus 2, device 4) [D] fl_open_devices(390): 0e0f:0002 (bus 2, device 3) [D] fl_open_devices(390): 0e0f:0003 (bus 2, device 2) [D] fl_open_devices(390): 1d6b:0001 (bus 2, device 1) [D] _fl_open_device(491): No devices found [D] fl_open_device(123): no device found . fl_open_devices(344): trying to open: 20A0 :: flirc.tv [D] fl_open_devices(390): 1d6b:0002 (bus 1, device 1) [D] fl_open_devices(390): 0e0f:0008 (bus 2, device 4) [D] fl_open_devices(390): 0e0f:0002 (bus 2, device 3) [D] fl_open_devices(390): 0e0f:0003 (bus 2, device 2) [D] fl_open_devices(390): 1d6b:0001 (bus 2, device 1) fl_open_devices(344): trying to open: 20A0 :: claylogic.com [D] fl_open_devices(390): 1d6b:0002 (bus 1, device 1) [D] fl_open_devices(390): 0e0f:0008 (bus 2, device 4) [D] fl_open_devices(390): 0e0f:0002 (bus 2, device 3) [D] fl_open_devices(390): 0e0f:0003 (bus 2, device 2) [D] fl_open_devices(390): 1d6b:0001 (bus 2, device 1) [D] _fl_open_device(491): No devices found [D] fl_open_device(123): no device found . fl_open_devices(344): trying to open: 20A0 :: flirc.tv [D] fl_open_devices(390): 20a0:0001 (bus 2, device 9) [E] fl_open_devices(428): Cannot query device, is the GUI open? [D] fl_open_devices(390): 1d6b:0002 (bus 1, device 1) [D] fl_open_devices(390): 0e0f:0008 (bus 2, device 4) [D] fl_open_devices(390): 0e0f:0002 (bus 2, device 3) [D] fl_open_devices(390): 0e0f:0003 (bus 2, device 2) [D] fl_open_devices(390): 1d6b:0001 (bus 2, device 1) fl_open_devices(344): trying to open: 20A0 :: claylogic.com [D] fl_open_devices(390): 20a0:0001 (bus 2, device 9) [D] fl_open_devices(390): 1d6b:0002 (bus 1, device 1) [D] fl_open_devices(390): 0e0f:0008 (bus 2, device 4) [D] fl_open_devices(390): 0e0f:0002 (bus 2, device 3) [D] fl_open_devices(390): 0e0f:0003 (bus 2, device 2) [D] fl_open_devices(390): 1d6b:0001 (bus 2, device 1) [D] _fl_open_device(491): No devices found [D] fl_open_device(123): no device found . fl_open_devices(344): trying to open: 20A0 :: flirc.tv [D] fl_open_devices(390): 20a0:0001 (bus 2, device 9) [D] fl_open_devices(433): Vendor: flirc.tv [D] fl_open_devices(453): [Vendor Match] fl_open_devices(461): usb port:2 [D] fl_open_devices(390): 1d6b:0002 (bus 1, device 1) [D] fl_open_devices(390): 0e0f:0008 (bus 2, device 4) [D] fl_open_devices(390): 0e0f:0002 (bus 2, device 3) [D] fl_open_devices(390): 0e0f:0003 (bus 2, device 2) [D] fl_open_devices(390): 1d6b:0001 (bus 2, device 1) [D] fl_open_device(135): Firmware v:2.6 [D] determine_iface(46): fw_state: firmware [D] determine_iface(47): version: 2.6 [D] determine_iface(99): initializing fw ver2.6 [DEVICE] FW Detected [DEVICE] EOK do_embedded_upgrade(393): done with upgrade [D] checkHardwareStatus(170): state: normal [D] checkHardwareStatus(170): state: normal <closed application> root@ubuntu:~# flirc_util status Last upgrade attempt: Error root@ubuntu:~# flirc_util version flirc_util version v1.2.6 [v1.2.6] Firmware: v2.6

Bump. I'm having the exact same issue. I got my flirc in May 2013 and have dusted it off every few months to revisit the same frustration. Here are the results from flirc_util command line tool. I have the same results in Linux and Win7Pro root@ubuntu:~/usr/bin# ./flirc_util status Last upgrade attempt: Error root@ubuntu:~/usr/bin# ./flirc_util version flirc_util version v1.2.6 [v1.2.6] Firmware: v2.6 At this point, I don't remember all the exact steps I've tried, but none of the GUI versions have worked and I've tried doing the manual driver installation through device manager as well as tinkering with with Zadig [Edit: Added flirc_util output]