Jul  1 21:49:56 ph4 kernel: PM: Syncing filesystems ... done.
Jul  1 21:49:56 ph4 kernel: PM: Preparing system for mem sleep
Jul  1 21:49:56 ph4 kernel: BUG: unable to handle kernel NULL pointer dereference at           (null)
Jul  1 21:49:56 ph4 kernel: IP: [<ffffffffa03f5813>] r600_hdmi_enable+0x43/0x2e0 [radeon]
Jul  1 21:49:56 ph4 kernel: PGD 126748067 PUD 12a78c067 PMD 0 
Jul  1 21:49:56 ph4 kernel: Oops: 0000 [#1] PREEMPT SMP 
Jul  1 21:49:56 ph4 kernel: Modules linked in: ext2 cpufreq_ondemand radeon fbcon bitblit fbcon_rotate fbcon_ccw fbcon_ud fbcon_cw softcursor snd_hda_codec_hdmi font tileblit i2c_algo_bit snd_hda_codec_realtek drm_kms_helper snd_virtuoso ttm snd_hda_intel snd_oxygen_lib snd_hda_codec snd_mpu401_uart drm snd_rawmidi snd_seq_device snd_hwdep snd_pcm firewire_ohci snd_page_alloc snd_timer firewire_core snd i2c_piix4 acpi_cpufreq xhci_hcd ata_generic plusb pata_jmicron mperf i2c_core k10temp r8169 usbnet freq_table crc_itu_t mii asus_atk0110 microcode pata_acpi soundcore pcspkr
Jul  1 21:49:56 ph4 kernel: CPU: 0 PID: 400 Comm: X Tainted: G        W    3.10.0-rc5-ga144acb #1
Jul  1 21:49:56 ph4 kernel: Hardware name: System manufacturer System Product Name/M4A89GTD-PRO/USB3, BIOS 1456    05/04/2010
Jul  1 21:49:56 ph4 kernel: task: ffff880126b244a0 ti: ffff880128c68000 task.ti: ffff880128c68000
Jul  1 21:49:56 ph4 kernel: RIP: 0010:[<ffffffffa03f5813>]  [<ffffffffa03f5813>] r600_hdmi_enable+0x43/0x2e0 [radeon]
Jul  1 21:49:56 ph4 kernel: RSP: 0018:ffff880128c698a8  EFLAGS: 00010246
Jul  1 21:49:56 ph4 kernel: RAX: 0000000000000000 RBX: ffff880128ccda00 RCX: 0000000000000008
Jul  1 21:49:56 ph4 kernel: RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff880128ccda00
Jul  1 21:49:56 ph4 kernel: RBP: ffff880128c698e8 R08: 0000000000000026 R09: 0000000000000021
Jul  1 21:49:56 ph4 kernel: R10: ffff88012a7d8a80 R11: ffff880128c69864 R12: 0000000000000000
Jul  1 21:49:56 ph4 kernel: R13: ffff880128ccdc00 R14: ffff8801230f0000 R15: 0000000000200001
Jul  1 21:49:56 ph4 kernel: FS:  00007f33c1a68880(0000) GS:ffff88012fc00000(0000) knlGS:0000000000000000
Jul  1 21:49:56 ph4 kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Jul  1 21:49:56 ph4 kernel: CR2: 0000000000000000 CR3: 0000000128da3000 CR4: 00000000000007f0
Jul  1 21:49:56 ph4 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Jul  1 21:49:56 ph4 kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Jul  1 21:49:56 ph4 kernel: Stack:
Jul  1 21:49:56 ph4 kernel: ffff880128c698b8 ffffffffa0234e49 ffff880128c698e8 ffff880128ccda00
Jul  1 21:49:56 ph4 kernel: ffff8801230f0000 ffff880126a55000 ffff880126a55000 0000000000200001
Jul  1 21:49:56 ph4 kernel: ffff880128c69918 ffffffffa040e2a7 ffff880128ccda00 ffff880126a55478
Jul  1 21:49:56 ph4 kernel: Call Trace:
Jul  1 21:49:56 ph4 kernel: [<ffffffffa0234e49>] ? drm_detect_hdmi_monitor+0x9/0xc0 [drm]
Jul  1 21:49:56 ph4 kernel: [<ffffffffa040e2a7>] radeon_atom_encoder_disable+0x157/0x160 [radeon]
Jul  1 21:49:56 ph4 kernel: [<ffffffffa0337712>] drm_helper_disable_unused_functions+0x142/0x180 [drm_kms_helper]
Jul  1 21:49:56 ph4 kernel: [<ffffffffa03392be>] drm_crtc_helper_set_config+0xa0e/0xab0 [drm_kms_helper]
Jul  1 21:49:56 ph4 kernel: [<ffffffffa022ef25>] drm_mode_set_config_internal+0x25/0x60 [drm]
Jul  1 21:49:56 ph4 kernel: [<ffffffffa0337195>] drm_fb_helper_set_par+0x65/0xd0 [drm_kms_helper]
Jul  1 21:49:56 ph4 kernel: [<ffffffff812a3595>] fb_set_var+0x185/0x420
Jul  1 21:49:56 ph4 kernel: [<ffffffff81069721>] ? resched_task+0x41/0x70
Jul  1 21:49:56 ph4 kernel: [<ffffffff810712d5>] ? set_next_entity+0xa5/0xc0
Jul  1 21:49:56 ph4 kernel: [<ffffffff8100143d>] ? __switch_to+0x2d/0x490
Jul  1 21:49:56 ph4 kernel: [<ffffffffa038edf4>] fbcon_blank+0x1d4/0x2c0 [fbcon]
Jul  1 21:49:56 ph4 kernel: [<ffffffff812ff679>] do_unblank_screen+0xa9/0x1b0
Jul  1 21:49:56 ph4 kernel: [<ffffffff812f5553>] complete_change_console+0x63/0xf0
Jul  1 21:49:56 ph4 kernel: [<ffffffff812f6738>] vt_ioctl+0x1158/0x11e0
Jul  1 21:49:56 ph4 kernel: [<ffffffff812ea1d8>] tty_ioctl+0x298/0xbc0
Jul  1 21:49:56 ph4 kernel: [<ffffffff810627fb>] ? __srcu_read_lock+0x7b/0xb0
Jul  1 21:49:56 ph4 kernel: [<ffffffff811710ea>] ? fsnotify+0x1ca/0x2b0
Jul  1 21:49:56 ph4 kernel: [<ffffffff81144f76>] do_vfs_ioctl+0x86/0x4e0
Jul  1 21:49:56 ph4 kernel: [<ffffffff81135d96>] ? __sb_end_write+0x36/0x70
Jul  1 21:49:56 ph4 kernel: [<ffffffff8114e9a4>] ? fget_light+0x64/0xf0
Jul  1 21:49:56 ph4 kernel: [<ffffffff8114541b>] SyS_ioctl+0x4b/0x90
Jul  1 21:49:56 ph4 kernel: [<ffffffff814c1f16>] system_call_fastpath+0x1a/0x1f
Jul  1 21:49:56 ph4 kernel: Code: 6d e8 4c 89 75 f0 41 89 f4 4c 89 7d f8 48 8b 07 4c 8b af 50 01 00 00 4c 8b b0 48 03 00 00 49 8b 85 08 01 00 00 0f 85 ed 00 00 00 <80> 38 00 0f 84 cd 00 00 00 41 83 be 18 01 00 00 1e 77 5e 8b 53 
Jul  1 21:49:56 ph4 kernel: RIP  [<ffffffffa03f5813>] r600_hdmi_enable+0x43/0x2e0 [radeon]
Jul  1 21:49:56 ph4 kernel: RSP <ffff880128c698a8>
Jul  1 21:49:56 ph4 kernel: CR2: 0000000000000000
Jul  1 21:49:56 ph4 kernel: ---[ end trace 6d6fe2fe5b2b731b ]---