[Webkit-unassigned] [Bug 161862] New: [GTK] WebProcess from WebKitGtk+ 2.13.91 hangs my Intel GPU

Mon Sep 12 08:16:09 PDT 2016

https://bugs.webkit.org/show_bug.cgi?id=161862

            Bug ID: 161862
           Summary: [GTK] WebProcess from WebKitGtk+ 2.13.91 hangs my
                    Intel GPU
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: agomez at igalia.com
                CC: bugs-noreply at webkitgtk.org

I'm using WebKitGtk+ with my own JHBuild setting:
https://github.com/tanty/jhbuild-epiphany/tree/master

Epiphany 3.20.3 and WebKit 2.13.91.

I'm running Epiphany with the dconf key:

"process-model" = "shared-secondary-process"

The compilation was done with CMake args:

'-DPORT=GTK -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_FLAGS_RELEASE="-O0 -g1 -DNDEBUG -DG_DISABLE_CAST_CHECKS" -DCMAKE_CXX_FLAGS_RELEASE="-O0 -g1 -DNDEBUG -DG_DISABLE_CAST_CHECKS"'

Just by opening the last closed session, the desktop gets stall, even when there is, apparently, no high CPU usage.

I can see this in the logs:

$ less /var/log/kern.log

[snip]

Sep 12 18:02:33 pomeron kernel: [  142.207298] [drm:i915_hangcheck_elapsed [i915]] *ERROR* Hangcheck timer elapsed... render ring idle
Sep 12 18:03:33 pomeron kernel: [  202.140067] [drm] no progress on render ring
Sep 12 18:03:33 pomeron kernel: [  202.141208] [drm] GPU HANG: ecode 6:-1:0x00000000, reason: Ring hung, action: reset
Sep 12 18:03:33 pomeron kernel: [  202.141212] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
Sep 12 18:03:33 pomeron kernel: [  202.141214] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
Sep 12 18:03:33 pomeron kernel: [  202.141217] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
Sep 12 18:03:33 pomeron kernel: [  202.141219] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
Sep 12 18:03:33 pomeron kernel: [  202.141222] [drm] GPU crash dump saved to /sys/class/drm/card0/error
Sep 12 18:03:33 pomeron kernel: [  202.141409] [drm:i915_switch_context [i915]] *ERROR* ring init context: -11
Sep 12 18:03:33 pomeron kernel: [  202.143473] drm/i915: Resetting chip after gpu hang
Sep 12 18:03:33 pomeron kernel: [  202.396871] [drm:ironlake_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
Sep 12 18:03:33 pomeron kernel: [  202.399002] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A
Sep 12 18:03:33 pomeron kernel: [  202.399026] [drm:cpt_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
Sep 12 18:03:33 pomeron kernel: [  202.408353] [drm:ironlake_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
Sep 12 18:03:33 pomeron kernel: [  202.432732] [drm:intel_check_pch_fifo_underruns [i915]] *ERROR* pch fifo underrun on pch transcoder B
Sep 12 18:03:41 pomeron kernel: [  210.163587] [drm] stuck on render ring
Sep 12 18:03:41 pomeron kernel: [  210.163990] [drm] GPU HANG: ecode 6:0:0x0009090b, in WebKitWebProces [4143], reason: Ring hung, action: reset
Sep 12 18:03:41 pomeron kernel: [  210.166054] drm/i915: Resetting chip after gpu hang

$ lspci -v

[snip]

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
        Subsystem: Lenovo 2nd Generation Core Processor Family Integrated Graphics Controller
        Flags: bus master, fast devsel, latency 0, IRQ 34
        Memory at f0000000 (64-bit, non-prefetchable) [size=4M]
        Memory at e0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at 5000 [size=64]
        [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
        Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
        Capabilities: [d0] Power Management version 2
        Capabilities: [a4] PCI Advanced Features
        Kernel driver in use: i915
        Kernel modules: i915

$ glxinfo | grep string
server glx vendor string: SGI
server glx version string: 1.4
client glx vendor string: Mesa Project and SGI
client glx version string: 1.4
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Mobile 
OpenGL core profile version string: 3.3 (Core Profile) Mesa 11.2.2
OpenGL core profile shading language version string: 3.30
OpenGL version string: 3.0 Mesa 11.2.2
OpenGL shading language version string: 1.30
OpenGL ES profile version string: OpenGL ES 3.0 Mesa 11.2.2
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.00

$ uname -a
Linux pomeron 4.6.0-1-amd64 #1 SMP Debian 4.6.1-1 (2016-06-06) x86_64 GNU/Linux

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