Hi all! My bluetooth keyboard is not working any more in rc4, but was working in rc3. Here is the dmesg output, triggered by the first key press on the keyboard, fortunately, this is 100% reproductible (once per boot). Attached my .config and the full dmesg output from boot, just in case. Best regards Marc [ 1492.544731] ------------[ cut here ]------------ [ 1492.544741] WARNING: at kernel/workqueue.c:371 flush_cpu_workqueue+0x2d/0x77() [ 1492.544748] Hardware name: System Product Name [ 1492.544753] Modules linked in: btusb ipv6 nfs lockd nfs_acl auth_rpcgss sunrpc loop snd_cmipci tuner gameport snd_hda_codec_atihdmi snd_opl3_lib cx88_alsa cx8800 cx88xx snd_mpu401_uart ir_common snd_hda_codec_via tveeprom snd_seq_midi videobuf_dma_sg snd_hda_intel snd_hda_codec psmouse videobuf_core snd_rawmidi snd_hwdep serio_raw btcx_risc wmi pcspkr [ 1492.544820] Pid: 324, comm: bluetooth Not tainted 2.6.30-rc4 #8 [ 1492.544825] Call Trace: [ 1492.544837] [] ? warn_slowpath+0xd8/0x10a [ 1492.544850] [] ? vsnprintf+0x3b8/0x3f7 [ 1492.544862] [] ? path_lookup_open+0x83/0x91 [ 1492.544872] [] ? snprintf+0x44/0x4c [ 1492.544882] [] ? __switch_to+0xab/0x25a [ 1492.544892] [] ? dequeue_entity+0xf/0x11f [ 1492.544901] [] ? _spin_unlock_irq+0x36/0x44 [ 1492.544910] [] ? finish_task_switch+0x47/0xd8 [ 1492.544921] [] ? thread_return+0x4c/0xa3 [ 1492.544931] [] ? flush_cpu_workqueue+0x2d/0x77 [ 1492.544940] [] ? finish_task_switch+0x47/0xd8 [ 1492.544950] [] ? default_spin_lock_flags+0x5/0xa [ 1492.544959] [] ? _spin_lock_irqsave+0x30/0x3d [ 1492.544968] [] ? flush_workqueue+0x33/0x55 [ 1492.544978] [] ? add_conn+0x14/0x39 [ 1492.544987] [] ? worker_thread+0x1c2/0x26a [ 1492.544996] [] ? autoremove_wake_function+0x0/0x2e [ 1492.545006] [] ? worker_thread+0x0/0x26a [ 1492.545015] [] ? worker_thread+0x0/0x26a [ 1492.545023] [] ? kthread+0x54/0x80 [ 1492.545033] [] ? schedule_tail+0x2b/0x62 [ 1492.545042] [] ? child_rip+0xa/0x20 [ 1492.545050] [] ? kthread+0x0/0x80 [ 1492.545058] [] ? child_rip+0x0/0x20 [ 1492.545064] ---[ end trace e4644449f8ce64bf ]--- [ 1492.613313] BUG: unable to handle kernel NULL pointer dereference at 0000000000000038 [ 1492.617028] IP: [] sysfs_addrm_start+0x25/0xa5 [ 1492.617028] PGD 0 [ 1492.617028] Oops: 0000 [#1] PREEMPT SMP [ 1492.617028] last sysfs file: /sys/devices/platform/it87.656/pwm1 [ 1492.617028] CPU 3 [ 1492.617028] Modules linked in: btusb ipv6 nfs lockd nfs_acl auth_rpcgss sunrpc loop snd_cmipci tuner gameport snd_hda_codec_atihdmi snd_opl3_lib cx88_alsa cx8800 cx88xx snd_mpu401_uart ir_common snd_hda_codec_via tveeprom snd_seq_midi videobuf_dma_sg snd_hda_intel snd_hda_codec psmouse videobuf_core snd_rawmidi snd_hwdep serio_raw btcx_risc wmi pcspkr [ 1492.617028] Pid: 3556, comm: hidd Tainted: G W 2.6.30-rc4 #8 System Product Name [ 1492.617028] RIP: 0010:[] [] sysfs_addrm_start+0x25/0xa5 [ 1492.617028] RSP: 0018:ffff88010ddd7a48 EFLAGS: 00010286 [ 1492.617028] RAX: ffff8800c59f1898 RBX: 0000000000000000 RCX: 0000000000000000 [ 1492.617028] RDX: fffffffffffffff8 RSI: 0000000000000000 RDI: ffffffff8074f1c0 [ 1492.617028] RBP: ffff88010ddd7a68 R08: 00000000000025c3 R09: ffff88010ddd7a2c [ 1492.617028] R10: ffff88010cd64360 R11: ffff8801071d9250 R12: 00000000fffffff4 [ 1492.617028] R13: 0000000000000000 R14: ffff88010ddd7ac0 R15: ffff8800ca4710e8 [ 1492.617028] FS: 00007f0ba75f56f0(0000) GS:ffff88002806b000(0000) knlGS:0000000000000000 [ 1492.617028] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 1492.617028] CR2: 0000000000000038 CR3: 000000010b4bb000 CR4: 00000000000006e0 [ 1492.617028] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1492.617028] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 1492.617028] Process hidd (pid: 3556, threadinfo ffff88010ddd6000, task ffff88010c5747c0) [ 1492.617028] Stack: [ 1492.617028] 0000000000000000 ffff8800c59f1898 ffff88010dc385a0 ffffffff80312608 [ 1492.617028] 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 1492.740068] ffff8800c59f1898 00000000fffffffe 00000000fffffff4 ffff8800c59f0000 [ 1492.740068] Call Trace: [ 1492.740068] [] ? create_dir+0x44/0x7c [ 1492.740068] [] ? sysfs_create_dir+0x35/0x4a [ 1492.740068] [] ? _spin_unlock+0x2f/0x3d [ 1492.740068] [] ? kobject_add_internal+0xd0/0x186 [ 1492.740068] [] ? kobject_add+0x74/0x7c [ 1492.740068] [] ? ____cache_alloc+0x18/0x222 [ 1492.740068] [] ? __kmalloc+0x140/0x14c [ 1492.740068] [] ? device_add+0xd1/0x50c [ 1492.740068] [] ? hci_get_route+0xae/0xbc [ 1492.740068] [] ? hid_add_device+0x143/0x159 [ 1492.740068] [] ? hidp_add_connection+0x35d/0x5de [ 1492.740068] [] ? __rcu_read_unlock+0xe/0x2a [ 1492.740068] [] ? hidp_sock_ioctl+0xf0/0x22b [ 1492.740068] [] ? _spin_lock+0x1a/0x20 [ 1492.740068] [] ? __do_fault+0x32e/0x376 [ 1492.740068] [] ? sockfd_lookup_light+0x1a/0x51 [ 1492.740068] [] ? sock_ioctl+0x1e7/0x20a [ 1492.740068] [] ? vfs_ioctl+0x21/0x6c [ 1492.740068] [] ? do_vfs_ioctl+0x432/0x46b [ 1492.740068] [] ? sys_ioctl+0x51/0x70 [ 1492.740068] [] ? system_call_fastpath+0x16/0x1b [ 1492.740068] Code: 44 89 f0 41 5e c3 55 31 c0 b9 08 00 00 00 48 89 fd 53 48 89 f3 48 83 ec 08 f3 ab 48 89 75 00 48 c7 c7 c0 f1 74 80 e8 3e 20 29 00 <48> 8b 73 38 48 8b 3d a6 18 60 00 48 89 d9 48 c7 c2 ec 1b 31 80 [ 1492.740068] RIP [] sysfs_addrm_start+0x25/0xa5 [ 1492.740068] RSP [ 1492.740068] CR2: 0000000000000038 [ 1492.741545] ---[ end trace e4644449f8ce64c0 ]---