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* Critical regression in 4.7-rcX
@ 2016-07-14 19:27 Larry Finger
  2016-07-15  6:55   ` Linus Torvalds
  0 siblings, 1 reply; 13+ messages in thread
From: Larry Finger @ 2016-07-14 19:27 UTC (permalink / raw)
  To: LKML, Linus Torvalds, Shubhangi Shrivastava

To anyone keeping track of regressions in kernel 4.7, I call your attention to 
https://bugs.freedesktop.org/show_bug.cgi?id=96675.

This bug causes driver i915 to fail to connect to the display, and results in a 
blank screen as soon as the kernel is loaded. The only way to operate with 
kernel 4.7 is to add "nomodeset" to the command line. The problem was bisected 
to commit f21a21983ef13a ("drm/i915: Splitting intel_dp_detect").

This bug was reported on 2016-06-25 16:10 UTC, but seems to have received no 
attention by the Intel group. That is the reason that I am complaining here. It 
seems very likely that kernel 4.7 will be released with this bug, and a number 
of high-end Toshiba laptops will break.

Thanks,

Larry
-- 
If I was stranded on an island and the only way to get off
the island was to make a pretty UI, I’d die there.

Linus Torvalds

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: Critical regression in 4.7-rcX
  2016-07-14 19:27 Critical regression in 4.7-rcX Larry Finger
@ 2016-07-15  6:55   ` Linus Torvalds
  0 siblings, 0 replies; 13+ messages in thread
From: Linus Torvalds @ 2016-07-15  6:55 UTC (permalink / raw)
  To: Larry Finger
  Cc: LKML, Shubhangi Shrivastava, Daniel Vetter, Jani Nikula,
	Ville Syrjälä,
	intel-gfx


[ Adding the proper people to the cc. ]

On Thu, 14 Jul 2016, Larry Finger wrote:
>
> To anyone keeping track of regressions in kernel 4.7, I call your attention to
> https://bugs.freedesktop.org/show_bug.cgi?id=96675.
> 
> This bug causes driver i915 to fail to connect to the display, and results in
> a blank screen as soon as the kernel is loaded. The only way to operate with
> kernel 4.7 is to add "nomodeset" to the command line. The problem was bisected
> to commit f21a21983ef13a ("drm/i915: Splitting intel_dp_detect").

Daniel? Jani? Time to revert?

              Linus

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: Critical regression in 4.7-rcX
@ 2016-07-15  6:55   ` Linus Torvalds
  0 siblings, 0 replies; 13+ messages in thread
From: Linus Torvalds @ 2016-07-15  6:55 UTC (permalink / raw)
  To: Larry Finger; +Cc: Daniel Vetter, intel-gfx, LKML, Shubhangi Shrivastava


[ Adding the proper people to the cc. ]

On Thu, 14 Jul 2016, Larry Finger wrote:
>
> To anyone keeping track of regressions in kernel 4.7, I call your attention to
> https://bugs.freedesktop.org/show_bug.cgi?id=96675.
> 
> This bug causes driver i915 to fail to connect to the display, and results in
> a blank screen as soon as the kernel is loaded. The only way to operate with
> kernel 4.7 is to add "nomodeset" to the command line. The problem was bisected
> to commit f21a21983ef13a ("drm/i915: Splitting intel_dp_detect").

Daniel? Jani? Time to revert?

              Linus
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: Critical regression in 4.7-rcX
  2016-07-15  6:55   ` Linus Torvalds
  (?)
@ 2016-07-15 14:27   ` Daniel Vetter
  2016-07-15 14:43       ` Ville Syrjälä
  -1 siblings, 1 reply; 13+ messages in thread
From: Daniel Vetter @ 2016-07-15 14:27 UTC (permalink / raw)
  To: Linus Torvalds
  Cc: Larry Finger, LKML, Shubhangi Shrivastava, Jani Nikula,
	Ville Syrjälä,
	intel-gfx

On Fri, Jul 15, 2016 at 8:55 AM, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
> On Thu, 14 Jul 2016, Larry Finger wrote:
>> To anyone keeping track of regressions in kernel 4.7, I call your attention to
>> https://bugs.freedesktop.org/show_bug.cgi?id=96675.
>>
>> This bug causes driver i915 to fail to connect to the display, and results in
>> a blank screen as soon as the kernel is loaded. The only way to operate with
>> kernel 4.7 is to add "nomodeset" to the command line. The problem was bisected
>> to commit f21a21983ef13a ("drm/i915: Splitting intel_dp_detect").
>
> Daniel? Jani? Time to revert?

Yup. Means that I'll get to revert a pile of patches (plus even more
in -next), but that's what we get for not handling regressions timely.
Dave poked me about the same bug already too. But will take a few days
until the pull is in your inbox I guess.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: Critical regression in 4.7-rcX
  2016-07-15 14:27   ` Daniel Vetter
@ 2016-07-15 14:43       ` Ville Syrjälä
  0 siblings, 0 replies; 13+ messages in thread
From: Ville Syrjälä @ 2016-07-15 14:43 UTC (permalink / raw)
  To: Daniel Vetter
  Cc: Linus Torvalds, Larry Finger, LKML, Shubhangi Shrivastava,
	Jani Nikula, intel-gfx

On Fri, Jul 15, 2016 at 04:27:27PM +0200, Daniel Vetter wrote:
> On Fri, Jul 15, 2016 at 8:55 AM, Linus Torvalds
> <torvalds@linux-foundation.org> wrote:
> > On Thu, 14 Jul 2016, Larry Finger wrote:
> >> To anyone keeping track of regressions in kernel 4.7, I call your attention to
> >> https://bugs.freedesktop.org/show_bug.cgi?id=96675.
> >>
> >> This bug causes driver i915 to fail to connect to the display, and results in
> >> a blank screen as soon as the kernel is loaded. The only way to operate with
> >> kernel 4.7 is to add "nomodeset" to the command line. The problem was bisected
> >> to commit f21a21983ef13a ("drm/i915: Splitting intel_dp_detect").
> >
> > Daniel? Jani? Time to revert?
> 
> Yup. Means that I'll get to revert a pile of patches (plus even more
> in -next), but that's what we get for not handling regressions timely.
> Dave poked me about the same bug already too. But will take a few days
> until the pull is in your inbox I guess.

I attached a oneliner to the bug today, that I *think* should fix the
problem.

-- 
Ville Syrjälä
Intel OTC

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: Critical regression in 4.7-rcX
@ 2016-07-15 14:43       ` Ville Syrjälä
  0 siblings, 0 replies; 13+ messages in thread
From: Ville Syrjälä @ 2016-07-15 14:43 UTC (permalink / raw)
  To: Daniel Vetter
  Cc: intel-gfx, LKML, Shubhangi Shrivastava, Linus Torvalds, Larry Finger

On Fri, Jul 15, 2016 at 04:27:27PM +0200, Daniel Vetter wrote:
> On Fri, Jul 15, 2016 at 8:55 AM, Linus Torvalds
> <torvalds@linux-foundation.org> wrote:
> > On Thu, 14 Jul 2016, Larry Finger wrote:
> >> To anyone keeping track of regressions in kernel 4.7, I call your attention to
> >> https://bugs.freedesktop.org/show_bug.cgi?id=96675.
> >>
> >> This bug causes driver i915 to fail to connect to the display, and results in
> >> a blank screen as soon as the kernel is loaded. The only way to operate with
> >> kernel 4.7 is to add "nomodeset" to the command line. The problem was bisected
> >> to commit f21a21983ef13a ("drm/i915: Splitting intel_dp_detect").
> >
> > Daniel? Jani? Time to revert?
> 
> Yup. Means that I'll get to revert a pile of patches (plus even more
> in -next), but that's what we get for not handling regressions timely.
> Dave poked me about the same bug already too. But will take a few days
> until the pull is in your inbox I guess.

I attached a oneliner to the bug today, that I *think* should fix the
problem.

-- 
Ville Syrjälä
Intel OTC
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: Critical regression in 4.7-rcX
  2016-07-15 14:43       ` Ville Syrjälä
  (?)
@ 2016-07-15 14:53       ` Larry Finger
  -1 siblings, 0 replies; 13+ messages in thread
From: Larry Finger @ 2016-07-15 14:53 UTC (permalink / raw)
  To: Ville Syrjälä, Daniel Vetter
  Cc: Linus Torvalds, LKML, Shubhangi Shrivastava, Jani Nikula, intel-gfx

On 07/15/2016 09:43 AM, Ville Syrjälä wrote:
> On Fri, Jul 15, 2016 at 04:27:27PM +0200, Daniel Vetter wrote:
>> On Fri, Jul 15, 2016 at 8:55 AM, Linus Torvalds
>> <torvalds@linux-foundation.org> wrote:
>>> On Thu, 14 Jul 2016, Larry Finger wrote:
>>>> To anyone keeping track of regressions in kernel 4.7, I call your attention to
>>>> https://bugs.freedesktop.org/show_bug.cgi?id=96675.
>>>>
>>>> This bug causes driver i915 to fail to connect to the display, and results in
>>>> a blank screen as soon as the kernel is loaded. The only way to operate with
>>>> kernel 4.7 is to add "nomodeset" to the command line. The problem was bisected
>>>> to commit f21a21983ef13a ("drm/i915: Splitting intel_dp_detect").
>>>
>>> Daniel? Jani? Time to revert?
>>
>> Yup. Means that I'll get to revert a pile of patches (plus even more
>> in -next), but that's what we get for not handling regressions timely.
>> Dave poked me about the same bug already too. But will take a few days
>> until the pull is in your inbox I guess.
>
> I attached a oneliner to the bug today, that I *think* should fix the
> problem.

Unfortunately, that patch did not help. If you have any other patches, or a repo 
I can pull from for testing, please let me know.

Larry

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: Critical regression in 4.7-rcX
  2016-07-15 14:43       ` Ville Syrjälä
@ 2016-07-15 15:34         ` Larry Finger
  -1 siblings, 0 replies; 13+ messages in thread
From: Larry Finger @ 2016-07-15 15:34 UTC (permalink / raw)
  To: Ville Syrjälä, Daniel Vetter
  Cc: Linus Torvalds, LKML, Shubhangi Shrivastava, Jani Nikula, intel-gfx

On 07/15/2016 09:43 AM, Ville Syrjälä wrote:
> On Fri, Jul 15, 2016 at 04:27:27PM +0200, Daniel Vetter wrote:
>> On Fri, Jul 15, 2016 at 8:55 AM, Linus Torvalds
>> <torvalds@linux-foundation.org> wrote:
>>> On Thu, 14 Jul 2016, Larry Finger wrote:
>>>> To anyone keeping track of regressions in kernel 4.7, I call your attention to
>>>> https://bugs.freedesktop.org/show_bug.cgi?id=96675.
>>>>
>>>> This bug causes driver i915 to fail to connect to the display, and results in
>>>> a blank screen as soon as the kernel is loaded. The only way to operate with
>>>> kernel 4.7 is to add "nomodeset" to the command line. The problem was bisected
>>>> to commit f21a21983ef13a ("drm/i915: Splitting intel_dp_detect").
>>>
>>> Daniel? Jani? Time to revert?
>>
>> Yup. Means that I'll get to revert a pile of patches (plus even more
>> in -next), but that's what we get for not handling regressions timely.
>> Dave poked me about the same bug already too. But will take a few days
>> until the pull is in your inbox I guess.
>
> I attached a oneliner to the bug today, that I *think* should fix the
> problem.

After I checked out the problem commit and built that kernel with the one-line 
patch, the display works; however, mainline still fails. I am currently 
bisecting to find what other commit fails. At a minimum, we should be able to 
reduce the number of commits that need reverting.

Larry

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: Critical regression in 4.7-rcX
@ 2016-07-15 15:34         ` Larry Finger
  0 siblings, 0 replies; 13+ messages in thread
From: Larry Finger @ 2016-07-15 15:34 UTC (permalink / raw)
  To: Ville Syrjälä, Daniel Vetter
  Cc: intel-gfx, Shubhangi Shrivastava, Linus Torvalds, LKML

On 07/15/2016 09:43 AM, Ville Syrjälä wrote:
> On Fri, Jul 15, 2016 at 04:27:27PM +0200, Daniel Vetter wrote:
>> On Fri, Jul 15, 2016 at 8:55 AM, Linus Torvalds
>> <torvalds@linux-foundation.org> wrote:
>>> On Thu, 14 Jul 2016, Larry Finger wrote:
>>>> To anyone keeping track of regressions in kernel 4.7, I call your attention to
>>>> https://bugs.freedesktop.org/show_bug.cgi?id=96675.
>>>>
>>>> This bug causes driver i915 to fail to connect to the display, and results in
>>>> a blank screen as soon as the kernel is loaded. The only way to operate with
>>>> kernel 4.7 is to add "nomodeset" to the command line. The problem was bisected
>>>> to commit f21a21983ef13a ("drm/i915: Splitting intel_dp_detect").
>>>
>>> Daniel? Jani? Time to revert?
>>
>> Yup. Means that I'll get to revert a pile of patches (plus even more
>> in -next), but that's what we get for not handling regressions timely.
>> Dave poked me about the same bug already too. But will take a few days
>> until the pull is in your inbox I guess.
>
> I attached a oneliner to the bug today, that I *think* should fix the
> problem.

After I checked out the problem commit and built that kernel with the one-line 
patch, the display works; however, mainline still fails. I am currently 
bisecting to find what other commit fails. At a minimum, we should be able to 
reduce the number of commits that need reverting.

Larry



_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: [Intel-gfx] Critical regression in 4.7-rcX
  2016-07-15 15:34         ` Larry Finger
@ 2016-07-15 16:36           ` Bish, Jim
  -1 siblings, 0 replies; 13+ messages in thread
From: Bish, Jim @ 2016-07-15 16:36 UTC (permalink / raw)
  To: ville.syrjala, Larry.Finger, daniel.vetter
  Cc: torvalds, intel-gfx, linux-kernel, Shrivastava, Shubhangi

On Fri, 2016-07-15 at 10:34 -0500, Larry Finger wrote:
> On 07/15/2016 09:43 AM, Ville Syrjälä wrote:
> > 
> > On Fri, Jul 15, 2016 at 04:27:27PM +0200, Daniel Vetter wrote:
> > > 
> > > On Fri, Jul 15, 2016 at 8:55 AM, Linus Torvalds
> > > <torvalds@linux-foundation.org> wrote:
> > > > 
> > > > On Thu, 14 Jul 2016, Larry Finger wrote:
> > > > > 
> > > > > To anyone keeping track of regressions in kernel 4.7, I call
> > > > > your attention to
> > > > > https://bugs.freedesktop.org/show_bug.cgi?id=96675.
> > > > > 
> > > > > This bug causes driver i915 to fail to connect to the
> > > > > display, and results in
> > > > > a blank screen as soon as the kernel is loaded. The only way
> > > > > to operate with
> > > > > kernel 4.7 is to add "nomodeset" to the command line. The
> > > > > problem was bisected
> > > > > to commit f21a21983ef13a ("drm/i915: Splitting
> > > > > intel_dp_detect").
> > > > Daniel? Jani? Time to revert?
> > > Yup. Means that I'll get to revert a pile of patches (plus even
> > > more
> > > in -next), but that's what we get for not handling regressions
> > > timely.
> > > Dave poked me about the same bug already too. But will take a few
> > > days
> > > until the pull is in your inbox I guess.
> > I attached a oneliner to the bug today, that I *think* should fix
> > the
> > problem.
> After I checked out the problem commit and built that kernel with the
> one-line 
> patch, the display works; however, mainline still fails. I am
> currently 
> bisecting to find what other commit fails. At a minimum, we should be
> able to 
> reduce the number of commits that need reverting.
> 
> Larry
I was seeing the same issue Linus reported but very sporadically.
 Assumed it was due to my wierd configuration - eDP + usb type c -> MST
hub -> DVI KVM -> dual head HDMI.  Checked out the one liner - works
for me but I guess there are still other failures.

Jim
> 
> 
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: Critical regression in 4.7-rcX
@ 2016-07-15 16:36           ` Bish, Jim
  0 siblings, 0 replies; 13+ messages in thread
From: Bish, Jim @ 2016-07-15 16:36 UTC (permalink / raw)
  To: ville.syrjala, Larry.Finger, daniel.vetter
  Cc: intel-gfx, Shrivastava, Shubhangi, torvalds, linux-kernel

On Fri, 2016-07-15 at 10:34 -0500, Larry Finger wrote:
> On 07/15/2016 09:43 AM, Ville Syrjälä wrote:
> > 
> > On Fri, Jul 15, 2016 at 04:27:27PM +0200, Daniel Vetter wrote:
> > > 
> > > On Fri, Jul 15, 2016 at 8:55 AM, Linus Torvalds
> > > <torvalds@linux-foundation.org> wrote:
> > > > 
> > > > On Thu, 14 Jul 2016, Larry Finger wrote:
> > > > > 
> > > > > To anyone keeping track of regressions in kernel 4.7, I call
> > > > > your attention to
> > > > > https://bugs.freedesktop.org/show_bug.cgi?id=96675.
> > > > > 
> > > > > This bug causes driver i915 to fail to connect to the
> > > > > display, and results in
> > > > > a blank screen as soon as the kernel is loaded. The only way
> > > > > to operate with
> > > > > kernel 4.7 is to add "nomodeset" to the command line. The
> > > > > problem was bisected
> > > > > to commit f21a21983ef13a ("drm/i915: Splitting
> > > > > intel_dp_detect").
> > > > Daniel? Jani? Time to revert?
> > > Yup. Means that I'll get to revert a pile of patches (plus even
> > > more
> > > in -next), but that's what we get for not handling regressions
> > > timely.
> > > Dave poked me about the same bug already too. But will take a few
> > > days
> > > until the pull is in your inbox I guess.
> > I attached a oneliner to the bug today, that I *think* should fix
> > the
> > problem.
> After I checked out the problem commit and built that kernel with the
> one-line 
> patch, the display works; however, mainline still fails. I am
> currently 
> bisecting to find what other commit fails. At a minimum, we should be
> able to 
> reduce the number of commits that need reverting.
> 
> Larry
I was seeing the same issue Linus reported but very sporadically.
 Assumed it was due to my wierd configuration - eDP + usb type c -> MST
hub -> DVI KVM -> dual head HDMI.  Checked out the one liner - works
for me but I guess there are still other failures.

Jim
> 
> 
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: [Intel-gfx] Critical regression in 4.7-rcX
  2016-07-15 16:36           ` Bish, Jim
@ 2016-07-15 17:26             ` Larry Finger
  -1 siblings, 0 replies; 13+ messages in thread
From: Larry Finger @ 2016-07-15 17:26 UTC (permalink / raw)
  To: Bish, Jim, ville.syrjala, daniel.vetter
  Cc: torvalds, intel-gfx, linux-kernel, Shrivastava, Shubhangi

On 07/15/2016 11:36 AM, Bish, Jim wrote:
> On Fri, 2016-07-15 at 10:34 -0500, Larry Finger wrote:
>> On 07/15/2016 09:43 AM, Ville Syrjälä wrote:
>>>
>>> On Fri, Jul 15, 2016 at 04:27:27PM +0200, Daniel Vetter wrote:
>>>>
>>>> On Fri, Jul 15, 2016 at 8:55 AM, Linus Torvalds
>>>> <torvalds@linux-foundation.org> wrote:
>>>>>
>>>>> On Thu, 14 Jul 2016, Larry Finger wrote:
>>>>>>
>>>>>> To anyone keeping track of regressions in kernel 4.7, I call
>>>>>> your attention to
>>>>>> https://bugs.freedesktop.org/show_bug.cgi?id=96675.
>>>>>>
>>>>>> This bug causes driver i915 to fail to connect to the
>>>>>> display, and results in
>>>>>> a blank screen as soon as the kernel is loaded. The only way
>>>>>> to operate with
>>>>>> kernel 4.7 is to add "nomodeset" to the command line. The
>>>>>> problem was bisected
>>>>>> to commit f21a21983ef13a ("drm/i915: Splitting
>>>>>> intel_dp_detect").
>>>>> Daniel? Jani? Time to revert?
>>>> Yup. Means that I'll get to revert a pile of patches (plus even
>>>> more
>>>> in -next), but that's what we get for not handling regressions
>>>> timely.
>>>> Dave poked me about the same bug already too. But will take a few
>>>> days
>>>> until the pull is in your inbox I guess.
>>> I attached a oneliner to the bug today, that I *think* should fix
>>> the
>>> problem.
>> After I checked out the problem commit and built that kernel with the
>> one-line
>> patch, the display works; however, mainline still fails. I am
>> currently
>> bisecting to find what other commit fails. At a minimum, we should be
>> able to
>> reduce the number of commits that need reverting.
>>
>> Larry
> I was seeing the same issue Linus reported but very sporadically.
>  Assumed it was due to my wierd configuration - eDP + usb type c -> MST
> hub -> DVI KVM -> dual head HDMI.  Checked out the one liner - works
> for me but I guess there are still other failures.

I'm not sure what I did wrong before, but when I retested mainline with the one 
liner, it now works. Once that is pushed to mainline, the bug should be fixed.

Sorry for any confusion.

Larry

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: Critical regression in 4.7-rcX
@ 2016-07-15 17:26             ` Larry Finger
  0 siblings, 0 replies; 13+ messages in thread
From: Larry Finger @ 2016-07-15 17:26 UTC (permalink / raw)
  To: Bish, Jim, ville.syrjala, daniel.vetter
  Cc: intel-gfx, Shrivastava, Shubhangi, torvalds, linux-kernel

On 07/15/2016 11:36 AM, Bish, Jim wrote:
> On Fri, 2016-07-15 at 10:34 -0500, Larry Finger wrote:
>> On 07/15/2016 09:43 AM, Ville Syrjälä wrote:
>>>
>>> On Fri, Jul 15, 2016 at 04:27:27PM +0200, Daniel Vetter wrote:
>>>>
>>>> On Fri, Jul 15, 2016 at 8:55 AM, Linus Torvalds
>>>> <torvalds@linux-foundation.org> wrote:
>>>>>
>>>>> On Thu, 14 Jul 2016, Larry Finger wrote:
>>>>>>
>>>>>> To anyone keeping track of regressions in kernel 4.7, I call
>>>>>> your attention to
>>>>>> https://bugs.freedesktop.org/show_bug.cgi?id=96675.
>>>>>>
>>>>>> This bug causes driver i915 to fail to connect to the
>>>>>> display, and results in
>>>>>> a blank screen as soon as the kernel is loaded. The only way
>>>>>> to operate with
>>>>>> kernel 4.7 is to add "nomodeset" to the command line. The
>>>>>> problem was bisected
>>>>>> to commit f21a21983ef13a ("drm/i915: Splitting
>>>>>> intel_dp_detect").
>>>>> Daniel? Jani? Time to revert?
>>>> Yup. Means that I'll get to revert a pile of patches (plus even
>>>> more
>>>> in -next), but that's what we get for not handling regressions
>>>> timely.
>>>> Dave poked me about the same bug already too. But will take a few
>>>> days
>>>> until the pull is in your inbox I guess.
>>> I attached a oneliner to the bug today, that I *think* should fix
>>> the
>>> problem.
>> After I checked out the problem commit and built that kernel with the
>> one-line
>> patch, the display works; however, mainline still fails. I am
>> currently
>> bisecting to find what other commit fails. At a minimum, we should be
>> able to
>> reduce the number of commits that need reverting.
>>
>> Larry
> I was seeing the same issue Linus reported but very sporadically.
>  Assumed it was due to my wierd configuration - eDP + usb type c -> MST
> hub -> DVI KVM -> dual head HDMI.  Checked out the one liner - works
> for me but I guess there are still other failures.

I'm not sure what I did wrong before, but when I retested mainline with the one 
liner, it now works. Once that is pushed to mainline, the bug should be fixed.

Sorry for any confusion.

Larry


_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 13+ messages in thread
end of thread, other threads:[~2016-07-15 17:26 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-07-14 19:27 Critical regression in 4.7-rcX Larry Finger
2016-07-15  6:55 ` Linus Torvalds
2016-07-15  6:55   ` Linus Torvalds
2016-07-15 14:27   ` Daniel Vetter
2016-07-15 14:43     ` Ville Syrjälä
2016-07-15 14:43       ` Ville Syrjälä
2016-07-15 14:53       ` Larry Finger
2016-07-15 15:34       ` Larry Finger
2016-07-15 15:34         ` Larry Finger
2016-07-15 16:36         ` [Intel-gfx] " Bish, Jim
2016-07-15 16:36           ` Bish, Jim
2016-07-15 17:26           ` [Intel-gfx] " Larry Finger
2016-07-15 17:26             ` Larry Finger

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