From Bugzilla Helper: User-Agent: Opera/8.5 (X11; Linux i686; U; en) Description of problem: I don't know what it is, but it crashes at boot and shows this kernel log. USB devices which are plugged in after this aren't working, but my USB mouse which is already attached works. Version-Release number of selected component (if applicable): kernel 2.6.13-1.1526_FC4 i686 How reproducible: Always Steps to Reproduce: boot the PC Actual Results: the kernel shows the log and new USB devices aren't working Expected Results: USB devices should be working like with kernel 2.6.12 Additional info: usb-storage: device scan complete Unable to handle kernel NULL pointer dereference at virtual address 00000060 printing eip: c020f0fb *pde = 15950067 Oops: 0000 [#1] Modules linked in: ipt_REJECT ipt_state ip_conntrack iptable_filter ip_tables vfat fat usb_storage scsi_mod dm_mod video button battery ac joydev ohci_hcd ehci_hcd uhci_hcd dvb_ttpci dvb_core l64781 saa7146_vv video_buf saa7146 v4l1_compat v4l2_common videodev ves1820 stv0299 tda8083 stv0297 sp8870 ves1x93 ttpci_eeprom shpchp parport_pc parport i2c_viapro i2c_core emu10k1_gp gameport snd_emu10k1 snd_rawmidi snd_ac97_codec snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_page_alloc snd_util_mem snd_hwdep snd soundcore 8139too mii floppy ext3 jbd CPU: 0 EIP: 0060:[<c020f0fb>] Not tainted VLI EFLAGS: 00010286 (2.6.13-1.1526_FC4) EIP is at sysfs_hash_and_remove+0xe/0x106 eax: 00000000 ebx: d493af2c ecx: 00000000 edx: c0420279 esi: d493af24 edi: d8c5bb74 ebp: d8c5bae0 esp: d7976dc0 ds: 007b es: 007b ss: 0068 Process khubd (pid: 67, threadinfo=d7976000 task=d7972550) Stack: c0420279 00000000 00000246 d493af2c d493af24 d8c5bb74 d8c5bae0 c02e951d d8c5bb7c d493af24 d493ac00 d663b858 d4f43e00 c02e9567 d663b800 d8c44367 d493ac00 d663b800 d663b7f8 d8c44541 d5c5d07c 00000282 d7976e4c 00000282 Call Trace: [<c02e951d>] class_device_del+0x98/0xda [<c02e9567>] class_device_unregister+0x8/0x10 [<d8c44367>] scsi_remove_device+0x4e/0x91 [scsi_mod] [<d8c44541>] __scsi_remove_target+0x197/0x56c [scsi_mod] [<d8c43134>] scsi_forget_host+0x149/0x4e1 [scsi_mod] [<c03ff867>] wait_for_completion+0x1f/0x52d [<d8c37c06>] scsi_remove_host+0x9/0x4b [scsi_mod] [<d8bdf168>] storage_disconnect+0x64/0x7e [usb_storage] [<c0332b18>] usb_unbind_interface+0x34/0x60 [<c02e853a>] __device_release_driver+0x4c/0x64 [<c02e857c>] device_release_driver+0x2a/0x38 [<c02e7ef1>] bus_remove_device+0x52/0x60 [<c02e73a0>] device_del+0x2b/0x5b [<c033efda>] usb_disable_device+0xbb/0x108 [<c0335bfb>] usb_disconnect+0xaa/0x3b8 [<c0336d6a>] hub_port_connect_change+0x51/0x857 [<c0337a3e>] hub_events+0x4ce/0x764 [<c0337cd4>] hub_thread+0x0/0xe2 [<c0337ce8>] hub_thread+0x14/0xe2 [<c01519c2>] autoremove_wake_function+0x0/0x37 [<c01508ab>] kthread+0x87/0x8b [<c0150824>] kthread+0x0/0x8b [<c01012ed>] kernel_thread_helper+0x5/0xb Code: 0c c7 44 24 08 d8 00 00 00 c7 44 24 04 95 8d 41 c0 c7 04 24 e8 f5 40 c0 e8 76 8a f1 ff 55 57 56 53 83 ec 0c 89 44 24 04 89 14 24 <8b> 70 60 8b 58 20 85 db 0f 84 87 00 00 00 ba 66 00 00 00 b8 90
*** Bug 170910 has been marked as a duplicate of this bug. ***
*** Bug 170911 has been marked as a duplicate of this bug. ***
*** Bug 170915 has been marked as a duplicate of this bug. ***
*** Bug 170917 has been marked as a duplicate of this bug. ***
*** Bug 170918 has been marked as a duplicate of this bug. ***
*** Bug 170919 has been marked as a duplicate of this bug. ***
*** Bug 170913 has been marked as a duplicate of this bug. ***
*** Bug 170921 has been marked as a duplicate of this bug. ***
2.6.14-1.1637_FC4 has been released as an update for FC4. Please retest with this update, as a large amount of code has been changed in this release, which may have fixed your problem. Thank you.