[Bug 110502] Steam client has graphical glitches

Tue Jun 18 14:29:01 UTC 2019

https://bugs.freedesktop.org/show_bug.cgi?id=110502

--- Comment #5 from Denis <denys.kostin at globallogic.com> ---
(In reply to asimiklit from comment #4)
> (In reply to leozinho29_eu from comment #2)
> > This option makes Steam crash here. The gdb output is:
> > 
> > Installing breakpad exception handler for appid(steam)/version(1555457005)
> > warning: Error reading shared library list entry at 0x4b40
> > warning: Error reading shared library list entry at 0x6ae0
> > warning: Corrupted shared library list: 0x569f0ac0 != 0x636f6c2f
> > steam: ../src/gallium/drivers/iris/iris_resource.c:813:
> > iris_resource_from_handle: Assertiva “res->bo->tiling_mode ==
> > isl_tiling_to_i915_tiling(res->surf.tiling)” falhou.
> > 
> > Program received signal SIGABRT, Aborted.
> > 0xf7fd5939 in __kernel_vsyscall ()
> > (gdb) bt
> > #0  0xf7fd5939 in __kernel_vsyscall ()
> > #1  0xf7a1f832 in raise () from /lib/i386-linux-gnu/libc.so.6
> > #2  0xf7a20cc1 in abort () from /lib/i386-linux-gnu/libc.so.6
> > #3  0xf7a177bb in ?? () from /lib/i386-linux-gnu/libc.so.6
> > #4  0xf7a17819 in __assert_fail () from /lib/i386-linux-gnu/libc.so.6
> > #5  0xf6e0c9d1 in iris_resource_from_handle (pscreen=0x569b1da8,
> > templ=0xffffa92c, whandle=0xffffa910, usage=1)
> >     at ../src/gallium/drivers/iris/iris_resource.c:777
> > #6  0xf67d5a6e in dri2_allocate_textures (ctx=0x569fdc80,
> > drawable=0x56b71930, statts=0x56b71ecc, 
> >     statts_count=2) at ../src/gallium/state_trackers/dri/dri2.c:606
> > #7  0xf67d68ce in dri_st_framebuffer_validate (stctx=0x56b644e0,
> > stfbi=0x56b71930, statts=0x56b71ecc, count=2, 
> >     out=0xffffaa50) at ../src/gallium/state_trackers/dri/dri_drawable.c:85
> > #8  0xf695ea62 in st_framebuffer_validate (stfb=0x56b71b40,
> > st=st at entry=0x56b644e0)
> >     at ../src/mesa/state_tracker/st_manager.c:222
> > #9  0xf695eda3 in st_api_make_current (stapi=0xf7403100 <st_gl_api>,
> > stctxi=0x56b644e0, stdrawi=0x56b71930, 
> >     streadi=0x56b71930) at ../src/mesa/state_tracker/st_manager.c:1082
> > #10 0xf67d62b3 in dri_make_current (cPriv=0x569fdc60,
> > driDrawPriv=0x56b71900, driReadPriv=0x56b71900)
> >     at ../src/gallium/state_trackers/dri/dri_context.c:301
> > #11 0xf67cff8f in driBindContext (pcp=0x569fdc60, pdp=0x56b71900,
> > prp=0x56b71900)
> >     at ../src/mesa/drivers/dri/common/dri_util.c:579
> > #12 0xf7615a4a in ?? () from /usr/lib/i386-linux-gnu/libGLX_mesa.so.0
> > #13 0xf75eb8f4 in ?? () from /usr/lib/i386-linux-gnu/libGLX_mesa.so.0
> > #14 0xf75ebb16 in ?? () from /usr/lib/i386-linux-gnu/libGLX_mesa.so.0
> > #15 0xf76ab05f in ?? () from /usr/lib/i386-linux-gnu/libGLX.so.0
> > #16 0xf76abab5 in ?? () from /usr/lib/i386-linux-gnu/libGLX.so.0
> > #17 0xf76ad0ad in ?? () from /usr/lib/i386-linux-gnu/libGLX.so.0
> > #18 0x565a9411 in CBaseLinuxUpdateUI::GatherGLInfo() ()
> > #19 0x565a997f in CBaseLinuxUpdateUI::BaseCreateWindow() ()
> > #20 0x565aa4fe in CXWindowsUpdateUI::BCreateWindow() ()
> > #21 0x5658e5a4 in ?? ()
> > #22 0x565793ac in ?? ()
> > #23 0xf7a0ae81 in __libc_start_main () from /lib/i386-linux-gnu/libc.so.6
> > #24 0x5657ce09 in _start ()
> 
> I have been investigating the mentioned Steam crash.
> I managed to reproduce this crash just under CFL+manjaro+LIBGL_DRI3_DISABLE=1
> I found out that the crash happens due to fail of a "isl_surf_init" function
> in "iris_resource_from_handle". The "isl_surf_init" function fails due
> to incorrect parameters which are passed to it:
> 
> info->width        = 400
> info->height       = 129
> info->row_pitch_B  = 1536
> info->format       = 233 (ISL_FORMAT_B8G8R8X8_UNORM)
> info->tiling_flags = X-tiling mode
> 
> The "isl_surf_init" fails on function "isl_calc_row_pitch" because
> "min_row_pitch_B" calculated as 2048 byte. So according to row_pitch_B=1536
> we calculate incorrectly a X-Tiling blocks quantity needed to cover
> 400pixels. There is not enough 1536/512=3blocks because one block according
> to PRM cover just 128pixels (for 32bpp). So 3blocks could cover just
> 384pixels. (hope B8G8R8X8 has 32bpp for Intel case because
> I didn't find anything about 24bit case with X-Tiling in PRMs)
> 
> 
> But at same time on KBL+ubuntu19.10+LIBGL_DRI3_DISABLE=1 this crash doesn't
> appear at all. This fact was interesting for me and I checked the params
> different so under KBL+ubuntu19.10:
> 
> info->width        = 400
> info->height       = 129
> info->row_pitch_B  = 2048
> info->format       = 233 (ISL_FORMAT_B8G8R8X8_UNORM)
> info->tiling_flags = X-tiling mode
> 
> So for some reason XServer under KBL+ubuntu19.10 calculates it correctly.
> "info->row_pitch_B" came from: 
> DRI2GetBuffersWithFormat glx/dri2.c:465
> line: "buffers[i].pitch = repBuffer.pitch;"
> 
> So now I am trying to find the location of the code which processing
> X_DRI2GetBuffersWithFormat request and calculates this 'pitch'. But
> unfortunately looks like XServer delegates the 'pitch' calculations to some
> other place. Please let me know If somebody know the location where this
> 'pitch' is calculated.
> 
> Note: I used the same Mesa revision on both machines 17c2c9cd677

Today after a Steam upgrade the crash disappeared.
So at the moment it works fine with iris driver under CFL+manjaro+LIBGL
DRI3_DISABLE=1
But unfortunately the original bug with graphical glitches is still there.

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