FYI
It was working in Fedora 20 after bug fix below

https://bugzilla.redhat.com/show_bug.cgi?id=1154454

It is now broken in Fedora 20 and 21 with current kernels

I have rechecked that it is working with the kernel I compiled for bug id=1154454.

*********** MASS BUG UPDATE **************

We apologize for the inconvenience.  There are a large number of bugs to go through and several of them have gone stale.  Due to this, we are doing a mass bug update across all of the Fedora 21 kernel bugs.

Fedora 21 has now been rebased to 3.18.3-201.fc21.  Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel.

If you experience different issues, please open a new bug report for those.

Can confirm still not working with 3.18.3-201.fc21 and in fact now hangs my laptop when USB tuner is inserted and I have to powercycle to get it back.
I can also confirm that my old FC20 kernel with the fix in  bug id=1154454 still works fine.

For your inspection,




Feb  3 13:12:05 wee-numpty kernel: [  400.817837] dvb-usb: found a 'DViCO FusionHDTV DVB-T NANO2 w/o firmware' in cold state, will try to load a firmware
Feb  3 13:12:05 wee-numpty kernel: dvb-usb: found a 'DViCO FusionHDTV DVB-T NANO2 w/o firmware' in cold state, will try to load a firmware
Feb  3 13:12:05 wee-numpty kernel: [  400.823823] dvb-usb: downloading firmware from file 'dvb-usb-bluebird-02.fw'
Feb  3 13:12:05 wee-numpty kernel: dvb-usb: downloading firmware from file 'dvb-usb-bluebird-02.fw'
Feb  3 13:12:05 wee-numpty kernel: [  400.826616] usbcore: registered new interface driver dvb_usb_cxusb
Feb  3 13:12:05 wee-numpty kernel: usbcore: registered new interface driver dvb_usb_cxusb
Feb  3 13:12:05 wee-numpty kernel: [  400.859307] usb 1-7: USB disconnect, device number 5
Feb  3 13:12:05 wee-numpty kernel: [  400.859358] BUG: unable to handle kernel paging request at 00000000000027f8
Feb  3 13:12:05 wee-numpty kernel: [  400.860132] IP: [<ffffffffa089f0ac>] cxusb_disconnect+0x1c/0xa0 [dvb_usb_cxusb]
Feb  3 13:12:05 wee-numpty kernel: [  400.860702] PGD 0
Feb  3 13:12:05 wee-numpty kernel: [  400.861192] Oops: 0000 [#1] SMP
Feb  3 13:12:05 wee-numpty kernel: [  400.861658] Modules linked in: dvb_usb_cxusb dib0070 dvb_usb dvb_core rc_core fuse rfcomm tun ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw bnep vfat fat uvcvideo videobuf2_vmalloc videobuf2_core intel_rapl x86_pkg_temp_thermal videobuf2_memops v4l2_common videodev coretemp kvm_intel media kvm ath3k btusb crct10dif_pclmul crc32_pclmul bluetooth crc32c_intel arc4 ath9k ghash_clmulni_intel snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic ath9k_common snd_hda_intel ath9k_hw snd_hda_controller snd_hda_codec ath acer_wmi mac80211 snd_hwdep snd_seq snd_seq_device sparse_keymap snd_pcm cfg80211 iTCO_wdt rfkill rtsx_pci_ms iTCO_vendor_support snd_timer memstick snd wmi shpchp joydev serio_raw mei_me i2c_i801 soundcore mei lpc_ich nfsd auth_rpcgss nfs_acl lockd grace sunrpc i915 rtsx_pci_sdmmc mmc_core i2c_algo_bit drm_kms_helper drm r8169 rtsx_pci mii mfd_core video
Feb  3 13:12:05 wee-numpty kernel: [  400.866712] CPU: 1 PID: 585 Comm: kworker/1:3 Not tainted 3.18.3-201.fc21.x86_64 #1
Feb  3 13:12:05 wee-numpty kernel: [  400.867433] Hardware name: Acer Aspire V5-573/Dazzle_HW, BIOS V2.24 10/22/2013
Feb  3 13:12:05 wee-numpty kernel: [  400.868214] Workqueue: usb_hub_wq hub_event
Feb  3 13:12:05 wee-numpty kernel: [  400.868939] task: ffff880251262740 ti: ffff88024e18c000 task.ti: ffff88024e18c000
Feb  3 13:12:05 wee-numpty kernel: [  400.869704] RIP: 0010:[<ffffffffa089f0ac>]  [<ffffffffa089f0ac>] cxusb_disconnect+0x1c/0xa0 [dvb_usb_cxusb]
Feb  3 13:12:05 wee-numpty kernel: [  400.870463] RSP: 0018:ffff88024e18fb28  EFLAGS: 00010296
Feb  3 13:12:05 wee-numpty kernel: [  400.871216] RAX: 0000000000000000 RBX: ffff880080095c30 RCX: 0000000000000000
Feb  3 13:12:05 wee-numpty kernel: [  400.871984] RDX: 0000000000000000 RSI: ffff880080095c00 RDI: ffff880080095c00
Feb  3 13:12:05 wee-numpty kernel: [  400.872750] RBP: ffff88024e18fb48 R08: 0000000000000202 R09: 0000000000000000
Feb  3 13:12:05 wee-numpty kernel: [  400.873522] R10: ffff88025f2573b0 R11: 0000000000000000 R12: ffff880080095c00
Feb  3 13:12:05 wee-numpty kernel: [  400.874296] R13: ffff880080095c00 R14: ffff88003f079090 R15: ffff88003f079000
Feb  3 13:12:05 wee-numpty kernel: [  400.875071] FS:  0000000000000000(0000) GS:ffff88025f240000(0000) knlGS:0000000000000000
Feb  3 13:12:05 wee-numpty kernel: [  400.875860] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Feb  3 13:12:05 wee-numpty kernel: [  400.876648] CR2: 00000000000027f8 CR3: 0000000001c11000 CR4: 00000000001407e0
Feb  3 13:12:05 wee-numpty kernel: [  400.877442] Stack:
Feb  3 13:12:05 wee-numpty kernel: [  400.878235]  ffff880080095c30 ffff880080095c30 ffff880080095c00 ffffffffa08a40a8
Feb  3 13:12:05 wee-numpty kernel: [  400.879046]  ffff88024e18fbb8 ffffffff81538518 00000000ffffffff ffffffff814b4b43
Feb  3 13:12:05 wee-numpty kernel: [  400.879852]  ffff88003f079090 ffff88003f079000 0000000000000000 ffffffffa08a40a8
Feb  3 13:12:05 wee-numpty kernel: [  400.880662] Call Trace:
Feb  3 13:12:05 wee-numpty kernel: [  400.881469]  [<ffffffff81538518>] usb_unbind_interface+0x1f8/0x2c0
Feb  3 13:12:05 wee-numpty kernel: [  400.882291]  [<ffffffff814b4b43>] ? rpm_idle+0x23/0x2b0
Feb  3 13:12:05 wee-numpty kernel: [  400.883120]  [<ffffffff814aaa9f>] __device_release_driver+0x7f/0xf0
Feb  3 13:12:05 wee-numpty kernel: [  400.883950]  [<ffffffff814aab33>] device_release_driver+0x23/0x30
Feb  3 13:12:05 wee-numpty kernel: [  400.884777]  [<ffffffff814aa3e8>] bus_remove_device+0x108/0x180
Feb  3 13:12:05 wee-numpty kernel: [  400.885598]  [<ffffffff814a66a9>] device_del+0x129/0x1f0
Feb  3 13:12:05 wee-numpty kernel: [  400.886417]  [<ffffffff81535a91>] usb_disable_device+0x91/0x290
Feb  3 13:12:05 wee-numpty kernel: [  400.887240]  [<ffffffff8152ae14>] usb_disconnect+0x94/0x2a0
Feb  3 13:12:05 wee-numpty kernel: [  400.888060]  [<ffffffff8152d069>] hub_event+0x5e9/0x1690
Feb  3 13:12:05 wee-numpty kernel: [  400.888879]  [<ffffffff8101dc39>] ? sched_clock+0x9/0x10
Feb  3 13:12:05 wee-numpty kernel: [  400.889699]  [<ffffffff810c8f1d>] ? sched_clock_cpu+0x9d/0xb0
Feb  3 13:12:05 wee-numpty kernel: [  400.890511]  [<ffffffff810b240d>] process_one_work+0x14d/0x400
Feb  3 13:12:05 wee-numpty kernel: [  400.891317]  [<ffffffff810b2d9b>] worker_thread+0x6b/0x4a0
Feb  3 13:12:05 wee-numpty kernel: [  400.892122]  [<ffffffff810b2d30>] ? rescuer_thread+0x2a0/0x2a0
Feb  3 13:12:05 wee-numpty kernel: [  400.892921]  [<ffffffff810b7fea>] kthread+0xea/0x100
Feb  3 13:12:05 wee-numpty kernel: [  400.893712]  [<ffffffff810b7f00>] ? kthread_create_on_node+0x1b0/0x1b0
Feb  3 13:12:05 wee-numpty kernel: [  400.894511]  [<ffffffff817646fc>] ret_from_fork+0x7c/0xb0
Feb  3 13:12:05 wee-numpty kernel: [  400.895298]  [<ffffffff810b7f00>] ? kthread_create_on_node+0x1b0/0x1b0
Feb  3 13:12:05 wee-numpty kernel: [  400.896075] Code: 00 31 c0 5d c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 55 41 54 53 49 89 fd 48 83 ec 08 48 8b 87 d0 00 00 00 <48> 8b 98 f8 27 00 00 4c 8b 63 18 4d 85 e4 74 19 49 8b 84 24 b0
Feb  3 13:12:05 wee-numpty kernel: [  400.897779] RIP  [<ffffffffa089f0ac>] cxusb_disconnect+0x1c/0xa0 [dvb_usb_cxusb]
Feb  3 13:12:05 wee-numpty kernel: [  400.898594]  RSP <ffff88024e18fb28>
Feb  3 13:12:05 wee-numpty kernel: [  400.899383] CR2: 00000000000027f8
Feb  3 13:12:05 wee-numpty kernel: [  400.903823] ---[ end trace 734bfdc71b9e9df2 ]---
Feb  3 13:12:05 wee-numpty kernel: [  400.903891] BUG: unable to handle kernel paging request at ffffffffffffffd8
Feb  3 13:12:05 wee-numpty kernel: usb 1-7: USB disconnect, device number 5
Feb  3 13:12:05 wee-numpty kernel: BUG: unable to handle kernel paging request at 00000000000027f8
Feb  3 13:12:05 wee-numpty kernel: IP: [<ffffffffa089f0ac>] cxusb_disconnect+0x1c/0xa0 [dvb_usb_cxusb]
Feb  3 13:12:05 wee-numpty kernel: PGD 0
Feb  3 13:12:05 wee-numpty kernel: Oops: 0000 [#1] SMP
Feb  3 13:12:05 wee-numpty kernel: Modules linked in: dvb_usb_cxusb dib0070 dvb_usb dvb_core rc_core fuse rfcomm tun ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw bnep vfat fat uvcvideo videobuf2_vmalloc videobuf2_core intel_rapl x86_pkg_temp_thermal videobuf2_memops v4l2_common videodev coretemp kvm_intel media kvm ath3k btusb crct10dif_pclmul crc32_pclmul bluetooth crc32c_intel arc4 ath9k ghash_clmulni_intel snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic ath9k_common snd_hda_intel
Feb  3 13:12:05 wee-numpty kernel: ath9k_hw snd_hda_controller snd_hda_codec ath acer_wmi mac80211 snd_hwdep snd_seq snd_seq_device sparse_keymap snd_pcm cfg80211 iTCO_wdt rfkill rtsx_pci_ms iTCO_vendor_support snd_timer memstick snd wmi shpchp joydev serio_raw mei_me i2c_i801 soundcore mei lpc_ich nfsd auth_rpcgss nfs_acl lockd grace sunrpc i915 rtsx_pci_sdmmc mmc_core i2c_algo_bit drm_kms_helper drm r8169 rtsx_pci mii mfd_core video
Feb  3 13:12:05 wee-numpty kernel: CPU: 1 PID: 585 Comm: kworker/1:3 Not tainted 3.18.3-201.fc21.x86_64 #1
Feb  3 13:12:05 wee-numpty kernel: Hardware name: Acer Aspire V5-573/Dazzle_HW, BIOS V2.24 10/22/2013
Feb  3 13:12:05 wee-numpty kernel: Workqueue: usb_hub_wq hub_event

*********** MASS BUG UPDATE **************

We apologize for the inconvenience.  There is a large number of bugs to go through and several of them have gone stale.  Due to this, we are doing a mass bug update across all of the Fedora 21 kernel bugs.

Fedora 21 has now been rebased to 3.19.5-200.fc21.  Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel.

If you have moved on to Fedora 22, and are still experiencing this issue, please change the version to Fedora 22.

If you experience different issues, please open a new bug report for those.

I can confirm that kernel 3.19.5-200.fc21 has the same issue.
If USB is inserted when the OS is up then it results in a hung system (laptop) which needs powercycled.
Additionally if USB is in the laptop when powered on it will not boot error messages can be supplied on request.
I can also confirm that the kernel I compiled for the Fedora 20 bug report still works.
https://bugzilla.redhat.com/show_bug.cgi?id=1154454

Can you confirm what was the first kernel where you saw this issue and what was the last known working kernel? From looking at https://bugzilla.redhat.com/show_bug.cgi?id=1154454, it seems like the oops started happening sometime after 3.16.7?

I may not be able to pinpoint the exact kernel, it was working with kernel-3.16.7-200.fc20 on 3/11/2014 and had stopped working on 16/12/2014.
The new ooops is not exactly the same as in the original report as new ooops hangs the laptop.

It's possible that the first time I noticed the issue was when I first upgraded the laptop to Fedora 21.  However as I don't use the DVB-T USB daily I may have missed the issue appearing in Fedora 20 kernels.

And hangs laptop in Fedora 22 with kernel 4.0.4-301.

Created attachment 1031554 [details]
phone camera shot of boot up with USB inserted

As in previous comment this is Fedora 22 with 4.0.4 kernel.
If hot-plugged then hangs laptop requiring a powercycle, if inserted before boot then kernel oops and laptop will not boot.

This message is a reminder that Fedora 21 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
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