Re: [BUG] rc1 and rc2: Laptop unusable: on boot,screen black instead of native resolution

[Martin Kepplinger <martink@posteo.de>]

Am 2014-06-27 21:51, schrieb Martin Kepplinger:
> Am 2014-06-27 20:09, schrieb Martin Kepplinger:
>> Am 2014-06-27 17:14, schrieb Zhang Rui:
>>> On Mon, 2014-06-23 at 16:46 +0200, Martin Kepplinger wrote:
>>>> Am 2014-06-23 15:14, schrieb Zhang Rui:
>>>>> On Mon, 2014-06-23 at 14:22 +0200, Martin Kepplinger wrote:
>>>>>> Am 2014-06-23 03:10, schrieb Zhang, Rui:
>>>>>>>
>>>>>>>
>>>>>>>> -----Original Message-----
>>>>>>>> From: Martin Kepplinger [mailto:martink@posteo.de]
>>>>>>>> Sent: Sunday, June 22, 2014 10:25 PM
>>>>>>>> To: Zhang, Rui
>>>>>>>> Cc: rjw@rjwysocki.net; lenb@kernel.org; linux-acpi@vger.kernel.org;
>>>>>>>> linux-kernel@vger.kernel.org
>>>>>>>> Subject: [BUG] rc1 and rc2: Laptop unusable: on boot,screen black
>>>>>>>> instead of native resolution
>>>>>>>> Importance: High
>>>>>>>>
>>>>>>>> Since 3.16-rc1 my laptop's just goes black while booting, instead of
>>>>>>>> switching to native screen resolution and showing me the starting
>>>>>>>> system there. It's an Acer TravelMate B113 with i915 driver and
>>>>>>>> acer_wmi. It stays black and is unusable.
>>>>>>>>
>>>>> This looks like a duplicate of
>>>>> https://bugzilla.kernel.org/show_bug.cgi?id=78601
>>>>>
>>>>> thanks,
>>>>> rui
>>>> I'm not sure about that. I have no problem with v3.15 and the screen
>>>> goes black way before a display manager is started. It's right after the
>>>> kernel loaded and usually the screen is set to native resolution.
>>>>
>>>> Bisect told me aaeb2554337217dfa4eac2fcc90da7be540b9a73 as the first bad
>>>> one. Although, checking that out and running it, works good. not sure if
>>>> that makes sense.
>>>>
>>> could you please check if the comment in
>>> https://bugzilla.kernel.org/show_bug.cgi?id=78601#c5 solves your problem
>>> or not?
>>>
>>> thanks,
>>> rui
>>
>> thanks for checking. This does not change anything though. I tested the
>> following on top of v3.16-rc2 and linus's tree as of today, almost -rc3.
>>
>> ---
>>  drivers/gpu/drm/i915/intel_fbdev.c |    1 -
>>  1 file changed, 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_fbdev.c
>> b/drivers/gpu/drm/i915/intel_fbdev.c
>> index 088fe93..1e2f9ae 100644
>> --- a/drivers/gpu/drm/i915/intel_fbdev.c
>> +++ b/drivers/gpu/drm/i915/intel_fbdev.c
>> @@ -453,7 +453,6 @@ out:
>>  }
>>
>>  static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
>> -       .initial_config = intel_fb_initial_config,
>>         .gamma_set = intel_crtc_fb_gamma_set,
>>         .gamma_get = intel_crtc_fb_gamma_get,
>>         .fb_probe = intelfb_create,
>>
> 
> I also tested the following patch from
> http://lists.freedesktop.org/archives/intel-gfx/2014-June/047981.html
> now, with no results. No change in my case :(
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index efd3cf5..5aee08e 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -11087,6 +11087,22 @@ const char *intel_output_name(int output)
>         return names[output];
>  }
> 
> +static bool intel_crt_present(struct drm_device *dev)
> +{
> +       struct drm_i915_private *dev_priv = dev->dev_private;
> +
> +       if (IS_ULT(dev))
> +               return false;
> +
> +       if (IS_CHERRYVIEW(dev))
> +               return false;
> +
> +       if (IS_VALLEYVIEW(dev) && !dev_priv->vbt.int_crt_support)
> +               return false;
> +
> +       return true;
> +}
> +
>  static void intel_setup_outputs(struct drm_device *dev)
>  {
>         struct drm_i915_private *dev_priv = dev->dev_private;
> @@ -11095,7 +11111,7 @@ static void intel_setup_outputs(struct
> drm_device *dev)
> 
>         intel_lvds_init(dev);
> 
> -       if (!IS_ULT(dev) && !IS_CHERRYVIEW(dev) &&
> dev_priv->vbt.int_crt_support)
> +       if (intel_crt_present(dev))
>                 intel_crt_init(dev);
> 
>         if (HAS_DDI(dev)) {
> 
I'm on i686 and also the following from
https://bugzilla.redhat.com/show_bug.cgi?id=1110968#c16 does not help :(
this is bad.

---
 arch/x86/kernel/signal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kernel/signal.c	
+++ a/arch/x86/kernel/signal.c	
@@ -363,7 +363,7 @@ static int __setup_rt_frame(int sig, struct ksignal
*ksig,

 		/* Set up to return from userspace.  */
 		restorer = current->mm->context.vdso +
-			selected_vdso32->sym___kernel_sigreturn;
+			selected_vdso32->sym___kernel_rt_sigreturn;
 		if (ksig->ka.sa.sa_flags & SA_RESTORER)
 			restorer = ksig->ka.sa.sa_restorer;
 		put_user_ex(restorer, &frame->pretcode);
--