Public bug reported:
I run a MBP8.1 with Intel graphics and a Dell monitor attached via
DisplayPort. Occassionally (several times a day) the external monitor
goes blank, but the internal monitor shows that X keeps the resolution
from the big screen. Unplugging and reattaching the external monitor
restores the signal.
dmsg tells me this:
[26524.076841] ------------[ cut here ]------------
[26524.076934] WARNING: at
/build/buildd/linux-3.8.0/drivers/gpu/drm/i915/intel_dp.c:1997
intel_dp_link_down+0x19c/0x1b0 [i915]()
[26524.076938] Hardware name: MacBookPro8,1
[26524.076942] Modules linked in: mmc_block tcp_diag(F) inet_diag(F) hidp
pci_stub vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF)
ipt_MASQUERADE(F) iptable_nat(F) nf_conntrack_ipv4(F) nf_defrag_ipv4(F)
nf_nat_ipv4(F) nf_nat(F) nf_conntrack(F) ip_tables(F) x_tables(F) parport_pc(F)
ppdev(F) bridge(F) stp(F) llc(F) bnep rfcomm binfmt_misc(F) coretemp kvm_intel
kvm aesni_intel(F) aes_i586(F) xts(F) lrw(F) gf128mul(F) ablk_helper(F)
cryptd(F) btusb bluetooth bcm5974 applesmc input_polldev joydev(F) uvcvideo
videobuf2_vmalloc videobuf2_memops videobuf2_core videodev snd_hda_codec_hdmi
snd_hda_codec_cirrus snd_hda_intel microcode(F) snd_hda_codec snd_hwdep(F)
snd_pcm(F) snd_page_alloc(F) snd_seq_midi(F) snd_seq_midi_event(F)
snd_rawmidi(F) apple_gmux lpc_ich snd_seq(F) snd_seq_device(F) snd_timer(F)
snd(F) soundcore(F) mei apple_bl arc4(F) b43 mac_hid bcma mac80211 cfg80211 ssb
lp(F) parport(F) usb_storage(F) hid_microsoft hid_generic i915 hid_apple
firewire_ohci firewire_core i2c_a
lgo_bit sdhci_pci crc_itu_t(F) drm_kms_helper sdhci tg3 drm ptp usbhid
pps_core hid video(F)
[26524.077093] Pid: 1455, comm: Xorg Tainted: GF W O 3.8.0-29-generic
#42-Ubuntu
[26524.077097] Call Trace:
[26524.077119] [<c104a692>] warn_slowpath_common+0x72/0xa0
[26524.077158] [<f867dffc>] ? intel_dp_link_down+0x19c/0x1b0 [i915]
[26524.077190] [<f867dffc>] ? intel_dp_link_down+0x19c/0x1b0 [i915]
[26524.077199] [<c104a6e2>] warn_slowpath_null+0x22/0x30
[26524.077230] [<f867dffc>] intel_dp_link_down+0x19c/0x1b0 [i915]
[26524.077265] [<f86808d7>] ? intel_dp_sink_dpms+0x47/0xa0 [i915]
[26524.077299] [<f8680971>] intel_disable_dp+0x41/0x70 [i915]
[26524.077333] [<f866e9d8>] ironlake_crtc_disable+0x5d8/0x7d0 [i915]
[26524.077347] [<c114d5f7>] ? kmem_cache_free+0xc7/0x100
[26524.077356] [<c15254ed>] ? __kfree_skb+0x3d/0x90
[26524.077362] [<c15254ed>] ? __kfree_skb+0x3d/0x90
[26524.077369] [<c15254ed>] ? __kfree_skb+0x3d/0x90
[26524.077375] [<c15254ed>] ? __kfree_skb+0x3d/0x90
[26524.077409] [<f8672efe>] intel_crtc_update_dpms+0x5e/0x90 [i915]
[26524.077440] [<f8672fc8>] intel_encoder_dpms+0x18/0x30 [i915]
[26524.077500] [<f8675355>] intel_connector_dpms+0x35/0x60 [i915]
[26524.077549] [<f85204e5>] drm_mode_obj_set_property_ioctl+0x385/0x3a0 [drm]
[26524.077579] [<f8520537>] drm_mode_connector_property_set_ioctl+0x37/0x50
[drm]
[26524.077605] [<f8520500>] ? drm_mode_obj_set_property_ioctl+0x3a0/0x3a0 [drm]
[26524.077634] [<f8510eda>] drm_ioctl+0x42a/0x490 [drm]
[26524.077652] [<f8520500>] ? drm_mode_obj_set_property_ioctl+0x3a0/0x3a0 [drm]
[26524.077659] [<c115fc17>] ? do_sync_read+0x97/0xd0
[26524.077672] [<f8510ab0>] ? drm_copy_field+0x80/0x80 [drm]
[26524.077676] [<c116fb50>] do_vfs_ioctl+0x80/0x580
[26524.077680] [<c11604c5>] ? vfs_read+0xe5/0x160
[26524.077684] [<c11700bb>] sys_ioctl+0x6b/0x80
[26524.077690] [<c161b24d>] sysenter_do_call+0x12/0x28
[26524.077693] ---[ end trace cdc5fd47e94b5868 ]---
The ubuntu-bug screen fails on me, so I guess I will have to report it
manually like this.
** Affects: xserver-xorg-video-intel (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1220658
Title:
DP monitor turns off now and then
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1220658/+subscriptions
_______________________________________________
Mailing list: https://launchpad.net/~ubuntu-x-swat
Post to : ubuntu-x-swat@lists.launchpad.net
Unsubscribe : https://launchpad.net/~ubuntu-x-swat
More help : https://help.launchpad.net/ListHelp
