Description of problem:
after suspend to ram (laptop lid close) -> resume (lid open) cycle, the system stuck. on the primary console i see only fedora logo, the secondary console allows to root login and restart.

Additional info:
reporter:       libreport-2.1.10
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP: [<ffffffffa01b71c6>] nvc0_vm_map_sg+0x96/0x100 [nouveau]
PGD 9e4ee067 PUD 9b92a067 PMD 0 
Oops: 0000 [#1] SMP 
Modules linked in: usb_storage nf_conntrack_netbios_ns nf_conntrack_broadcast ipt_MASQUERADE ip6t_REJECT xt_conntrack bnep 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 dm_crypt snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel x86_pkg_temp_thermal coretemp arc4 kvm_intel ath9k kvm ath9k_common ath9k_hw ath snd_hda_codec mac80211 uvcvideo snd_hwdep snd_seq snd_seq_device snd_pcm snd_page_alloc videobuf2_vmalloc ath3k btusb crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel videobuf2_memops snd_timer snd cfg80211 videobuf2_core videodev bluetooth asus_nb_wmi asus_wmi sparse_keymap rfkill atl1c iTCO_wdt iTCO_vendor_support soundcore mei_me joydev shpchp media lpc_ich mei mfd_core serio_raw microcode i2c_i801 nfsd auth_rpcgss nfs_acl lockd sunrpc raid1 raid0 nouveau i915 ttm i2c_algo_bit drm_kms_helper drm mxm_wmi i2c_core video wmi
CPU: 3 PID: 7231 Comm: X Not tainted 3.12.6-300.fc20.x86_64 #1
Hardware name: ASUSTeK Computer Inc. N73SV/N73SV, BIOS N73SV.303 04/28/2011
task: ffff8802f7fae300 ti: ffff88008c3e2000 task.ti: ffff88008c3e2000
RIP: 0010:[<ffffffffa01b71c6>]  [<ffffffffa01b71c6>] nvc0_vm_map_sg+0x96/0x100 [nouveau]
RSP: 0018:ffff88008c3e35b0  EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000500000000
RDX: 00000000000002ff RSI: 0000000000000003 RDI: ffff88033b713000
RBP: ffff88008c3e3600 R08: 0000000000000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000008000 R12: 0000000000001e10
R13: ffff88033a68e900 R14: ffff88033b713000 R15: 0000000000000000
FS:  00007f4ec30829c0(0000) GS:ffff88034fa60000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000a56d2000 CR4: 00000000000407e0
Stack:
 ffff8802baaaff40 00001e14baaaff40 0000000000001800 0000000000000000
 0000000500000000 0000000000000300 ffff88033b4ff100 ffff88033a68e900
 ffff8802baaaff40 ffff8802baaaff00 ffff88008c3e3658 ffffffffa01b50ac
Call Trace:
 [<ffffffffa01b50ac>] nouveau_vm_map_sg+0xdc/0x150 [nouveau]
 [<ffffffffa01f19d1>] nouveau_vma_getmap.isra.14+0x61/0x90 [nouveau]
 [<ffffffffa01f1a7a>] nouveau_bo_move_m2mf.isra.15+0x7a/0x130 [nouveau]
 [<ffffffffa01b4cfd>] ? nouveau_vm_map_at+0x15d/0x1d0 [nouveau]
 [<ffffffffa01f237b>] nouveau_bo_move+0x9b/0x420 [nouveau]
 [<ffffffffa01b4d83>] ? nouveau_vm_map+0x13/0x20 [nouveau]
 [<ffffffffa0082bf5>] ttm_bo_handle_move_mem+0x245/0x5b0 [ttm]
 [<ffffffffa0083599>] ? ttm_bo_mem_space+0x169/0x340 [ttm]
 [<ffffffffa0083af7>] ttm_bo_move_buffer+0x107/0x120 [ttm]
 [<ffffffff8114b0b6>] ? __alloc_pages_nodemask+0x166/0xaa0
 [<ffffffffa0083bd1>] ttm_bo_validate+0xc1/0x130 [ttm]
 [<ffffffffa01f2d7a>] nouveau_bo_pin+0xda/0x160 [nouveau]
 [<ffffffffa021554c>] nv50_crtc_swap_fbs.isra.12+0x2c/0xd0 [nouveau]
 [<ffffffffa01f309c>] ? nouveau_bo_rd32+0x2c/0x30 [nouveau]
 [<ffffffffa02175a1>] nv50_crtc_mode_set+0x121/0x3f0 [nouveau]
 [<ffffffffa00da0dc>] drm_crtc_helper_set_mode+0x2ec/0x510 [drm_kms_helper]
 [<ffffffffa00db795>] drm_crtc_helper_set_config+0x9c5/0xb20 [drm_kms_helper]
 [<ffffffffa020439c>] nouveau_crtc_set_config+0x4c/0x140 [nouveau]
 [<ffffffffa00311bd>] drm_mode_set_config_internal+0x5d/0xe0 [drm]
 [<ffffffffa0033c37>] drm_mode_setcrtc+0xf7/0x650 [drm]
 [<ffffffffa01fdd20>] ? nouveau_user_framebuffer_create+0x60/0xb0 [nouveau]
 [<ffffffff81666ea2>] ? mutex_lock+0x12/0x30
 [<ffffffffa0024c32>] drm_ioctl+0x502/0x630 [drm]
 [<ffffffffa01ece31>] nouveau_drm_ioctl+0x51/0x90 [nouveau]
 [<ffffffff811c0cdd>] do_vfs_ioctl+0x2dd/0x4b0
 [<ffffffff811c0f31>] SyS_ioctl+0x81/0xa0
 [<ffffffff81672129>] system_call_fastpath+0x16/0x1b
Code: 45 d0 48 8d 04 d5 08 00 00 00 48 89 45 c0 41 8d 44 24 04 89 45 bc eb 0c 0f 1f 44 00 00 48 8b 45 b0 8b 70 30 48 8b 45 c8 4c 89 f7 <4a> 8b 14 38 48 c1 ea 08 49 89 d5 48 83 ca 03 49 83 cd 01 83 e6 
RIP  [<ffffffffa01b71c6>] nvc0_vm_map_sg+0x96/0x100 [nouveau]
 RSP <ffff88008c3e35b0>