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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - 2 Displayport Screens on Lenovo x230(Intel HD4000) Dock: several things make one of them stop working."
href="https://bugs.freedesktop.org/show_bug.cgi?id=62462#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - 2 Displayport Screens on Lenovo x230(Intel HD4000) Dock: several things make one of them stop working."
href="https://bugs.freedesktop.org/show_bug.cgi?id=62462">bug 62462</a>
from <span class="vcard"><a class="email" href="mailto:georges@trypill.org" title="georges@trypill.org">georges@trypill.org</a>
</span></b>
<pre>Hi,
I am running a thinkpad x220 on a dockingstation with two displayport displays.
Both run at 2560x1440.
I also experienced for a long time various errors ranging from blank display,
to black display with weird colors in the corners to flickering all over the
display.
It seems to only happen when flash is active.
Solution -> pull the plug on the display -> back on -> works.
I am running Debian wheezy (testing) with a custom kernel 3.8.6.
Recently (somewhere in the 3.8.x series) some problems just disappeared and the
only one left seems to be on suspend-resume and after the initial boot and
setting the resolution to the one mentioned above...here it's not always the
same, sometimes flickering or just blank display.
Here a trace from today:
[drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
[drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
[drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
[drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
------------[ cut here ]------------
WARNING: at drivers/gpu/drm/i915/intel_display.c:1028
ironlake_crtc_disable+0xb7/0x775 [i915]()
Hardware name: 42914BG
pipe_off wait timed out
Modules linked in: xt_state iptable_filter pci_stub vboxpci(O) vboxnetadp(O)
vboxnetflt(O) bnep rfcomm bluetooth vboxdrv(O) fuse nfsd auth_rpcgss nfs_acl
nfs lockd fscache sunrpc ext4 jbd2 mbcache tp_smapi(O) thinkpad_ec(O)
sha256_generic iwldvm iTCO_wdt psmouse kvm_intel cdc_mbim kvm i2c_i801
thinkpad_acpi battery cdc_ncm usbnet snd_usb_audio mii snd_usbmidi_lib cdc_wdm
snd_rawmidi cdc_acm snd_hwdep snd_hda_codec_hdmi ac tpm_tis tpm
snd_hda_codec_conexant tpm_bios snd_hda_intel snd_hda_codec snd_pcm iwlwifi
snd_page_alloc snd_timer lpc_ich mfd_core acpi_cpufreq mperf processor xfs
libcrc32c exportfs hid_generic hid_logitech_dj crc32c_intel aesni_intel
aes_x86_64 xts lrw gf128mul ablk_helper cryptd sdhci_pci sdhci mmc_core
microcode xhci_hcd thermal i915 video drm_kms_helper button
Pid: 3997, comm: Xorg Tainted: G O 3.8.6 #35
Call Trace:
[<ffffffff81029e18>] ? warn_slowpath_common+0x76/0x8a
[<ffffffff81029ec4>] ? warn_slowpath_fmt+0x45/0x4a
[<ffffffffa0038278>] ? intel_wait_for_pipe_off+0x8e/0x166 [i915]
[<ffffffffa0038ab2>] ? ironlake_crtc_disable+0xb7/0x775 [i915]
[<ffffffffa003ef27>] ? intel_set_mode+0x382/0x7ae [i915]
[<ffffffff810d3ac8>] ? poll_freewait+0x36/0x83
[<ffffffffa003f90f>] ? intel_crtc_set_config+0x5bc/0x764 [i915]
[<ffffffff81151ffc>] ? snprintf+0x39/0x3e
[<ffffffff811e8147>] ? drm_mode_setcrtc+0x409/0x46c
[<ffffffff813cc1c9>] ? mutex_lock+0xd/0x2d
[<ffffffff811dbe08>] ? drm_ioctl+0x28c/0x36a
[<ffffffff811e7d3e>] ? drm_mode_setplane+0x2e5/0x2e5
[<ffffffff810d29a6>] ? vfs_ioctl+0x1e/0x31
[<ffffffff810d31dd>] ? do_vfs_ioctl+0x3ed/0x42f
[<ffffffff810c63c7>] ? vfs_read+0xf7/0x11e
[<ffffffff810d325a>] ? sys_ioctl+0x3b/0x65
[<ffffffff813ce712>] ? system_call_fastpath+0x16/0x1b
---[ end trace 8ee801de211f13f7 ]---
Hope this helps</pre>
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