[Bug 84891] [byt] black screen

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=84891

Jani Nikula <jani.nikula at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P1                          |P3
             Status|NEW                         |NEEDINFO
            Summary|DRM and new Intel BayTrail  |[byt] black screen
                   |issue                       |
           Severity|high                        |normal

--- Comment #3 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to Ghry from comment #0)
> >Description:
> All kernel version(s) which are > version 3.12.x (3.13,3.14,3.15,3.16) do
> not run on my notebook asus x551ma which is much new (summer 2014); Kernel
> version(s) >3.12.x give me black screen (backlighs turns off) on start;
> Anyways, the kernel 3.12.28-1 which I can hardly run now supports video
> driver  "xf86-video-intel 2.99.912-2" pretty bad causing so called "blurry"
> graphics effect; Two times I had kernel panics (not sure where it comes from
> but anyways it is a bad sign...); I really hope the bug(s) will be fixed in
> kernel 3.17 final so I do the report

You've marked this as a regression. Which kernel version worked?

> [    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-312-x86_64 root=UUID=*
> rw pcie_aspm=force acpi_osi=Linux "acpi_osi=!Windows 2012" acpi=force
> acpi_enforce_resources=lax i915.i915_enable_rc6=1 i915.i915_enable_fbc=1
> i915.lvds_downclock=1 i915.semaphores=1 drm.vblankoffdelay=1
> acpi_backlight=vendor resume=UUID=* quiet splash

Please drop at least i915.i915_enable_rc6=1 i915.i915_enable_fbc=1
i915.lvds_downclock=1 i915.semaphores=1. Would like to recommend dropping most
other extra params too unless you really know what you're doing.

Please try latest 3.17-rc or drm-intel-nightly branch from
http://cgit.freedesktop.org/drm-intel, and attach dmesg with drm.debug=14
module parameter set.

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