Additional info:
WARNING: at drivers/gpu/drm/i915/intel_display.c:1049 intel_enable_pipe+0xb6/0x180 [i915]()
Hardware name: Compaq Presario C700 Notebook PC
PLL state assertion failure (expected on, current off)
Modules linked in: fuse ebtable_nat xt_CHECKSUM bridge stp llc nf_conntrack_netbios_ns nf_conntrack_broadcast ipt_MASQUERADE ip6table_mangle ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 iptable_nat nf_nat_ipv4 nf_nat bnep iptable_mangle bluetooth nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ebtable_filter ebtables ip6table_filter ip6_tables be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb4i cxgb4 cxgb3i cxgb3 mdio libcxgbi ib_iser rdma_cm ib_addr iw_cm ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev media arc4 snd_hda_codec_conexant iTCO_wdt iTCO_vendor_support ath5k snd_hda_intel snd_hda_codec ath mac80211 snd_hwdep snd_seq lpc_ich cfg80211 hp_wmi 8139too 8139cp snd_seq_device sparse_keymap snd_pcm mii mfd_core coretemp rfkill snd_page_alloc snd_timer snd i2c_i801 microcode soundcore uinput binfmt_misc i915 i2c_algo_bit drm_kms_helper drm wmi i2c_core video ums_realtek usb_storage
Pid: 1092, comm: upowerd Not tainted 3.7.2-201.fc18.i686.PAE #1
Call Trace:
 [<c044d6a2>] warn_slowpath_common+0x72/0xa0
 [<f8442416>] ? intel_enable_pipe+0xb6/0x180 [i915]
 [<f8442416>] ? intel_enable_pipe+0xb6/0x180 [i915]
 [<c044d773>] warn_slowpath_fmt+0x33/0x40
 [<f8442416>] intel_enable_pipe+0xb6/0x180 [i915]
 [<f8444c44>] i9xx_crtc_mode_set+0x9d4/0x1150 [i915]
 [<c068600c>] ? get_from_free_list+0x3c/0x50
 [<f844986c>] intel_set_mode+0x5dc/0x9a0 [i915]
 [<c063cf25>] ? hashtab_search+0x45/0x60
 [<f844aaf6>] intel_get_load_detect_pipe+0x226/0x380 [i915]
 [<c0446408>] ? kmap_atomic_prot+0x48/0x160
 [<c05b8b17>] ? sysfs_open_file+0xf7/0x220
 [<c050eee0>] ? prep_new_page+0x170/0x220
 [<f8462ef7>] intel_tv_detect+0xe7/0x4b0 [i915]
 [<c050f0d9>] ? get_page_from_freelist+0x149/0x3a0
 [<f828d84a>] status_show+0x3a/0x80 [drm]
 [<f828d810>] ? dpms_show+0x60/0x60 [drm]
 [<c076097f>] dev_attr_show+0x1f/0x50
 [<c05b8625>] sysfs_read_file+0x85/0x160
 [<c0559d03>] ? rw_verify_area+0x63/0x110
 [<c05b85a0>] ? sysfs_write_file+0xf0/0xf0
 [<c0559f99>] vfs_read+0x89/0x160
 [<c05b85a0>] ? sysfs_write_file+0xf0/0xf0
 [<c055a0b7>] sys_read+0x47/0x80
 [<c098f7cd>] sysenter_do_call+0x12/0x28