[Bug 100189] segfault at 234 error 4 in i915_dri.so

[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

            Bug ID: 100189
           Summary: segfault at 234 error 4 in i915_dri.so
           Product: Mesa
           Version: 17.0
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i915
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: javibato@hotmail.com
        QA Contact: dri-devel@lists.freedesktop.org

Lubuntu 16.04 4.4.0-38-generic x86_64
17.1~git1703131930

mpv/vo[18230]: segfault at 234 ip 00007ff625ed96e8 sp 00007ff6277fd7b0 error 4
in i915_dri.so[7ff6259f5000+9c8000]
glmark2[26598]: segfault at 234 ip 00007f917ecb36e8 sp 00007ffdf0586e30 error 4
in i915_dri.so[7f917e7cf000+9c8000]
glxgears[27933]: segfault at 234 ip 00007f87f68e66e8 sp 00007fff6da8a110 error
4 in i915_dri.so[7f87f6402000+9c8000]

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

--- Comment #1 from Javi Ballester Tomás <javibato@hotmail.com> ---
mpv only crashes when fullscreen on start is activated in mpv.conf (fs=yes).

blender crashes also with segfault:

# Blender 2.78 (sub 0), Commit date: 2017-02-24 14:33, Hash e92f2352830

        # backtrace
       
/home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender(BLI_system_backtrace+0x1d)
[0x19aad1d]
        /home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender()
[0x104e2e6]
        /lib/x86_64-linux-gnu/libc.so.6(+0x354b0) [0x7f3f49d924b0]
        /usr/lib/x86_64-linux-gnu/dri/i915_dri.so(+0x4e46e8) [0x7f3f352dc6e8]
        /usr/lib/x86_64-linux-gnu/dri/i915_dri.so(+0x4e4c65) [0x7f3f352dcc65]
        /usr/lib/x86_64-linux-gnu/dri/i915_dri.so(+0x4d68ed) [0x7f3f352ce8ed]
        /usr/lib/x86_64-linux-gnu/dri/i915_dri.so(+0x1df184) [0x7f3f34fd7184]
       
/home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender(_ZN13GHOST_Context11initClearGLEv+0x25)
[0x19cd185]
       
/home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender(_ZN16GHOST_ContextGLX24initializeDrawingContextEv+0x270)
[0x19cc490]
       
/home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender(_ZN15GHOST_WindowX1117newDrawingContextE25GHOST_TDrawingContextType+0x5d)
[0x19cb9cd]
       
/home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender(_ZN12GHOST_Window21setDrawingContextTypeE25GHOST_TDrawingContextType+0x8e)
[0x19ce33e]
       
/home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender(_ZN15GHOST_WindowX11C1EP15GHOST_SystemX11P9_XDisplayRK10STR_Stringiijj18GHOST_TWindowStatei25GHOST_TDrawingContextTypebbbtb+0x5b3)
[0x19cadb3]
       
/home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender(_ZN15GHOST_SystemX1112createWindowERK10STR_Stringiijj18GHOST_TWindowState25GHOST_TDrawingContextType16GHOST_GLSettingsbi+0xb1)
[0x19c8d71]
       
/home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender(GHOST_CreateWindow+0x62)
[0x19c40b2]
       
/home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender(wm_window_ghostwindows_ensure+0x1e1)
[0x106dbf1]
       
/home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender(WM_check+0x41)
[0x104eb31]
       
/home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender(wm_homefile_read+0x12c)
[0x105b4fc]
       
/home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender(WM_init+0xff)
[0x105d48f]
       
/home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender(main+0x264)
[0xfed4a4]
        /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)
[0x7f3f49d7d830]
        /home/javi/Downloads/blender-2.78c-linux-glibc219-x86_64/blender()
[0x104b278]

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

--- Comment #2 from Emil Velikov <emil.l.velikov@gmail.com> ---
Hi Javi, I don't think we have many devs looking at the i915 driver.

If you can track down the commit that introduced the regression (considering it
is one) or write a simple test program that will be appreciated.

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

--- Comment #3 from Javi Ballester Tomás <javibato@hotmail.com> ---
Hi Emil.
The upgrade that initiated the problem was (17.0~git1701100730.17eac3~gd~x,
17.1~git1702040730.106a51~gd~x), something happened between 170110 and 170204.

About the test program or tracking the exact commit, not shure how to do it.
Can you point me to info on how to?

Thanks.

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

--- Comment #4 from Javi Ballester Tomás <javibato@hotmail.com> ---
"LIBGL_ALWAYS_SOFTWARE=1 blender" works. Blender runs without errors. Also Mpv,
glmark2 and glxgears.

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

--- Comment #5 from Emil Velikov <emil.l.velikov@gmail.com> ---
(In reply to Javi Ballester Tomás from comment #3)
> Hi Emil.
> The upgrade that initiated the problem was (17.0~git1701100730.17eac3~gd~x,
> 17.1~git1702040730.106a51~gd~x), something happened between 170110 and
> 170204.
> 
Perfect - what you're looking for is "how to use git bisect". There's dozens of
sources out there - from `git help bisect' (in the command line) to the Wine
example [1]. In case you're wondering - Mesa source tree is located at [2]

Note that you will need to rebuild and test mesa ~10 times. Make sure to use
exact same build (configure) flags as your distro.

[1] https://wiki.winehq.org/Regression_Testing#Running_the_bisection
[2] https://cgit.freedesktop.org/mesa/mesa

(In reply to Javi Ballester Tomás from comment #4)
> "LIBGL_ALWAYS_SOFTWARE=1 blender" works. Blender runs without errors. Also
> Mpv, glmark2 and glxgears.

This is very good step - it tells us that the software rasteriser is working
fine.
I.e. the variable 'disables' the GPU driver and makes the CPU do all the heavy
lifting.

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

--- Comment #6 from Emil Velikov <emil.l.velikov@gmail.com> ---
Almost forgot - if you don't want to overwrite your system mesa simply do
$ git bisect...
$ configure ...
$ make
$ export LIBGL_DRIVERS_PATH=`pwd`/lib
$ export LIBGL_DEBUG=verbose
$ ... app to test ... 
# ensure that the i915_dri.so from the above location is used

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

--- Comment #7 from Javi Ballester Tomás <javibato@hotmail.com> ---
The result of 'git bisect':

e027935a795ecf546f3e4abcc25655766f9615ac is the first bad commit
commit e027935a795ecf546f3e4abcc25655766f9615ac
Author: Marek Olšák <marek.olsak@amd.com>
Date:   Wed Feb 22 19:59:27 2017 +0100

    st/mesa: don't update unrelated states in non-draw calls such as Clear

    If a VAO isn't bound and u_vbuf isn't enabled because of the Core profile,
    we'll get user vertex buffers in drivers if we update vertex buffers
    in glClear. So don't do that.

    This fixes a regression since disabling u_vbuf for Core profiles.

    Reviewed-by: Brian Paul <brianp@vmware.com>

:040000 040000 7843bc274cb97b72ebd0ba00906ba3baeecf0658
97a362bcd14da53ec9cfa940b3612d77e54be72d M      src

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

--- Comment #8 from Marek Olšák <maraeo@gmail.com> ---
Is this the gallium driver?

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

--- Comment #9 from Javi Ballester Tomás <javibato@hotmail.com> ---
Created attachment 130508
  --> https://bugs.freedesktop.org/attachment.cgi?id=130508&action=edit
output of glxinfo

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

--- Comment #10 from Javi Ballester Tomás <javibato@hotmail.com> ---
The "Gallium 0.4 on i915 (chipset: Pineview M)" is the one giving the segfault. 
The "Mesa DRI Intel(R) Pineview M" works.

Additional info, not related to this bug, I think:

The two works with some glitches in Blender. Gallium, the working ones, with
black windows or past state window, specially when rendering, that disappears
when some action is done in the part of the application that shows this
behavior. DRI with colorful semitransparent triangles in the corners of blender
windows, these doesn't disappears, but changes when scrolling.

No glitches in any of the two with "LIBGL_ALWAYS_SOFTWARE=1".

I attach the output of "glxinfo | grep OpenGL" for both, some errors in the
gallium one.

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

--- Comment #11 from Javi Ballester Tomás <javibato@hotmail.com> ---
(In reply to Marek Olšák from comment #8)
> Is this the gallium driver?

Yes.

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

--- Comment #12 from Marek Olšák <maraeo@gmail.com> ---
The i915 gallium driver is unmaintained and not even supported by its
manufacturer. This bug report starts its deprecation period. If the driver
remains in a broken state for a while, it will be removed from Mesa. Feel free
to ignore this bug. Cheers. :)

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

Emil Velikov <emil.l.velikov@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Drivers/DRI/i915            |Drivers/Gallium/i915g

--- Comment #13 from Emil Velikov <emil.l.velikov@gmail.com> ---
Nicely spotted Marek. Changing the component to gallium/i915g so that Stéphane
can find if a bit easier.

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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--- Comment #14 from Indie <indie@420blaze.it> ---
I also have a problem with these Gallium drivers. Is there a way to fix them,
or find an old unbroken version?

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

--- Comment #15 from Indie <indie@420blaze.it> ---
I actually need this.

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[Bug 100189] segfault at 234 error 4 in i915_dri.so

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https://bugs.freedesktop.org/show_bug.cgi?id=100189

--- Comment #16 from Francesco Turco <fturco@fastmail.fm> ---
I did a git bisect too, and I get the same bad commit as in comment 7.

I'm trying to build Mesa with Gallium for Intel/i915. But recent versions of
Mesa make my web browser Falkon crash at startup.

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GitLab Migration User <gitlab-migration@fdo.invalid> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|NEW                         |RESOLVED

--- Comment #17 from GitLab Migration User <gitlab-migration@fdo.invalid> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/669.

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