[Bug 64371] ddccontrol doesn't work on kernels >= 3.10.5
bugzilla-daemon at bugzilla.kernel.org
bugzilla-daemon at bugzilla.kernel.org
Mon Nov 11 07:30:59 PST 2013
https://bugzilla.kernel.org/show_bug.cgi?id=64371
--- Comment #11 from dbzix <dbz.gml at gmail.com> ---
Jani,
After running 'ddccontrol -p' on this kernel, above dmesg output appended with:
[ 599.453745] [drm:intel_dp_aux_ch], dp_aux_ch timeout status 0x7143003f
[ 599.453749] [drm:intel_dp_i2c_aux_ch], aux_ch failed -110
[ 599.456156] [drm:intel_dp_aux_ch], dp_aux_ch timeout status 0x7143003f
[ 599.456159] [drm:intel_dp_i2c_aux_ch], aux_ch failed -110
[ 599.456160] [drm:i2c_algo_dp_aux_xfer], dp_aux_xfer return -110
[ 599.458580] [drm:intel_dp_aux_ch], dp_aux_ch timeout status 0x7143003f
[ 599.458583] [drm:intel_dp_i2c_aux_ch], aux_ch failed -110
[ 599.460988] [drm:intel_dp_aux_ch], dp_aux_ch timeout status 0x7143003f
[ 599.460991] [drm:intel_dp_i2c_aux_ch], aux_ch failed -110
[ 599.460992] [drm:i2c_algo_dp_aux_xfer], dp_aux_xfer return -110
[ 599.463406] [drm:intel_dp_aux_ch], dp_aux_ch timeout status 0x7143003f
[ 599.463409] [drm:intel_dp_i2c_aux_ch], aux_ch failed -110
[ 599.465987] [drm:intel_dp_aux_ch], dp_aux_ch timeout status 0x7143003f
[ 599.466156] [drm:intel_dp_i2c_aux_ch], aux_ch failed -110
[ 599.466159] [drm:i2c_algo_dp_aux_xfer], dp_aux_xfer return -110
[ 599.466607] [drm:gmbus_xfer], GMBUS [i915 gmbus dpd] NAK for addr: 0050 w(1)
[ 599.470596] [drm:gmbus_xfer], GMBUS [i915 gmbus dpb] NAK for addr: 0050 w(1)
[ 599.542499] [drm] GMBUS [i915 gmbus panel] timed out, falling back to bit
banging on pin 3
[ 599.571185] [drm:gmbus_xfer], GMBUS [i915 gmbus vga] NAK for addr: 0037 w(6)
[ 599.616207] [drm:gmbus_xfer], GMBUS [i915 gmbus vga] NAK for addr: 0037 w(6)
[ 599.661346] [drm:gmbus_xfer], GMBUS [i915 gmbus vga] NAK for addr: 0037 w(6)
[ 599.706341] [drm:gmbus_xfer], GMBUS [i915 gmbus vga] NAK for addr: 0037 w(4)
[ 599.762281] [drm] GMBUS [i915 gmbus ssc] timed out, falling back to bit
banging on pin 1
Hope it helps.
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