[Bug 73704] New: Display on baytrail all-in-one non functional after bios update

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73704

          Priority: medium
            Bug ID: 73704
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: Display on baytrail all-in-one non functional after
                    bios update
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: sarvatt at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 92233
  --> https://bugs.freedesktop.org/attachment.cgi?id=92233&action=edit
Xorg.0.log

-- chipset: Intel Corporation ValleyView Gen7 [8086:0f31]
-- system architecture: x86_64
-- Linux distribution: Ubuntu 12.04.2
-- libdrm 2.4.43
-- Kernel versions affected: 3.13-rc4
-- xf86-video-intel: 2.20.9

The internal display on this all-in-one form factor machine stopped working
after a recent bios update, no other components changed.

[   15.390698] ------------[ cut here ]------------
[   15.390728] WARNING: at
/var/lib/dkms/drm-dkms-i915/3.13.0rc4hwe1somerville1/build/backports/drivers/gpu/drm/i915/intel_dp.c:1805
intel_enable_dp+0x8e/0x90 [i915]()
[   15.390731] Hardware name: Foo
[   15.390732] Modules linked in: snd_hda_intel(+) snd_hda_codec snd_hwdep arc4
snd_pcm snd_seq_midi coretemp snd_rawmidi snd_seq_midi_event ath9k(O) snd_seq
kvm_intel mac80211(O) i915(O) ath9k_common(O) kvm snd_timer uv$
[   15.390788] Pid: 299, comm: plymouthd Tainted: G           O
3.5.0-44-generic #67~precise1-Ubuntu
[   15.390791] Call Trace:
[   15.390800]  [<ffffffff81052e9f>] warn_slowpath_common+0x7f/0xc0
[   15.390804]  [<ffffffff81052efa>] warn_slowpath_null+0x1a/0x20
[   15.390822]  [<ffffffffa05e250e>] intel_enable_dp+0x8e/0x90 [i915]
[   15.390839]  [<ffffffffa05e265a>] vlv_pre_enable_dp+0x11a/0x170 [i915]
[   15.390856]  [<ffffffffa05ca59c>] valleyview_crtc_enable+0x11c/0x420 [i915]
[   15.390873]  [<ffffffffa05cc837>] __intel_set_mode+0x747/0x1570 [i915]
[   15.390889]  [<ffffffffa05cfaf6>] intel_set_mode+0x16/0x30 [i915]
[   15.390906]  [<ffffffffa05d0349>] intel_crtc_set_config+0x839/0xa50 [i915]
[   15.390924]  [<ffffffffa029f25c>] drm_mode_set_config_internal+0x5c/0xe0
[drm]
[   15.390931]  [<ffffffffa044b323>] drm_fb_helper_restore_fbdev_mode+0xb3/0xe0
[drm_kms_helper]
[   15.390951]  [<ffffffffa060c71a>] intel_fbdev_restore_mode+0x4a/0x84 [i915]
[   15.390964]  [<ffffffffa0592835>] i915_driver_lastclose+0x45/0x60 [i915]
[   15.390974]  [<ffffffffa0294b09>] drm_lastclose+0x49/0x1a0 [drm]
[   15.390985]  [<ffffffffa029509c>] drm_release+0x43c/0x600 [drm]
[   15.390990]  [<ffffffff81189e7e>] __fput+0xbe/0x240
[   15.390994]  [<ffffffff8118a025>] fput+0x25/0x30
[   15.390998]  [<ffffffff81186ca6>] filp_close+0x66/0x90
[   15.391002]  [<ffffffff81186d6e>] sys_close+0x9e/0x110
[   15.391008]  [<ffffffff816a7729>] system_call_fastpath+0x16/0x1b
[   15.391010] ---[ end trace 4516aee112870a3a ]---
[   15.526414] [drm:intel_pipe_config_compare] *ERROR* mismatch in
dpll_hw_state.dpll_md (expected 0x00000000, found 0x00000003)

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