* 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: 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
(?)
@ 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: 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: 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: 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
@ 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@linux.intel.com, Larry.Finger@lwfinger.net,
daniel.vetter@ffwll.ch
Cc: intel-gfx@lists.freedesktop.org, Shrivastava, Shubhangi,
torvalds@linux-foundation.org, linux-kernel@vger.kernel.org
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
0 siblings, 0 replies; 13+ messages in thread
From: Bish, Jim @ 2016-07-15 16:36 UTC (permalink / raw)
To: ville.syrjala@linux.intel.com, Larry.Finger@lwfinger.net,
daniel.vetter@ffwll.ch
Cc: torvalds@linux-foundation.org, intel-gfx@lists.freedesktop.org,
linux-kernel@vger.kernel.org, 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 ` [Intel-gfx] " 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@linux.intel.com, daniel.vetter@ffwll.ch
Cc: intel-gfx@lists.freedesktop.org, Shrivastava, Shubhangi,
torvalds@linux-foundation.org, linux-kernel@vger.kernel.org
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* Re: [Intel-gfx] 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@linux.intel.com, daniel.vetter@ffwll.ch
Cc: torvalds@linux-foundation.org, intel-gfx@lists.freedesktop.org,
linux-kernel@vger.kernel.org, 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