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------------------------------------------------------------------------
On 2014-07-24T07:51:43+00:00 Haagch wrote:

In current stable you have to override the blacklist for it to enable
gpu acceleration anyway, so this is more of a feature request to
investigate why this happens with dri3 but not with dri2. For non-
working webgl this is probably a little bit more serious.

On current google-chrome-unstable on a fresh profile with default settings gpu 
acceleration is enabled.
When it is manually enabled via chrome://flags and checking "Override software 
rendering list", this has happened at least since one or two stable versions, 
probably always.

Symptoms:

$ google-chrome-unstable
ATTENTION: default value of option force_s3tc_enable overridden by environment.
ATTENTION: option value of option force_s3tc_enable ignored.
[20081:20081:0724/093124:ERROR:command_buffer_proxy_impl.cc(153)] Could not 
send GpuCommandBufferMsg_Initialize.
[20081:20081:0724/093124:ERROR:webgraphicscontext3d_command_buffer_impl.cc(236)]
 CommandBufferProxy::Initialize failed.
[20081:20081:0724/093124:ERROR:webgraphicscontext3d_command_buffer_impl.cc(256)]
 Failed to initialize command buffer.

this is repeated two times and chrome://gpu has these Log Messages:

GpuProcessHostUIShim: The GPU process crashed!
GpuProcessHostUIShim: The GPU process crashed!
GpuProcessHostUIShim: The GPU process crashed!


But with LIBGL_DRI3_DISABLE=1 google-chrome-unstable it works without issues.

Ivy Bridge, xorg 1.16, xf86-video-intel with sna and mesa both from
recent git.

Reply at: https://bugs.launchpad.net/ubuntu/+source/chromium-
browser/+bug/1378627/comments/0

------------------------------------------------------------------------
On 2014-08-10T00:10:49+00:00 Haagch wrote:

It's more or less intel specific. With (dri3) offloading to a radeonsi
GPU all the gpu stuff works. But directly running it on intel doesn't.

Reply at: https://bugs.launchpad.net/ubuntu/+source/chromium-
browser/+bug/1378627/comments/1

------------------------------------------------------------------------
On 2014-08-11T01:05:22+00:00 Sean Watson wrote:

On different intel hardware I can confirm this bug. LIBGL_DRI3_DISABLE=1
fixed the problem, thanks to Haag for the fix.

OpenSUSE Factory AMD64  
Information     [    31.368] Current Operating System: Linux OpenSUSE.Linux 
3.16.0-rc7-2-desktop #1 SMP PREEMPT Wed Jul 30 09:38:03 UTC 2014 (9b5a5f0) 
x86_64
        Information     [    31.462]    compiled for 1.16.0, module version = 
2.99.914
        Information     X.Org X Server 1.16.0
GPU: Intel GM45 CPU: Pentium(R) Dual-Core CPU       T4200  @ 2.00GHz

Reply at: https://bugs.launchpad.net/ubuntu/+source/chromium-
browser/+bug/1378627/comments/2

------------------------------------------------------------------------
On 2014-09-08T14:45:50+00:00 Js314592 wrote:

Chrome 38 beta crashes on start-up in i965_dri.so if dri3 is enabled with:
sandy bridge, xserver 1.16, driver 2.99.916, mesa 10.2.7

Reply at: https://bugs.launchpad.net/ubuntu/+source/chromium-
browser/+bug/1378627/comments/5

------------------------------------------------------------------------
On 2014-09-08T15:19:02+00:00 Js314592 wrote:

Core was generated by `/usr/lib64/chromium-browser/chrome --type=gpu-process 
--channel=85383.0.1648497'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000032b4096f237 in brw_workaround_depthstencil_alignment () from 
/usr/lib64/dri/i965_dri.so
(gdb) bt
#0  0x0000032b4096f237 in brw_workaround_depthstencil_alignment () from 
/usr/lib64/dri/i965_dri.so
#1  0x0000032b40911888 in brw_clear () from /usr/lib64/dri/i965_dri.so
#2  0x0000007c4e294af9 in 
gpu::gles2::GLES2DecoderImpl::Initialize(scoped_refptr<gfx::GLSurface> const&, 
scoped_refptr<gfx::GLContext> const&, bool, gfx::Size const&, 
gpu::gles2::DisallowedFeatures const&, std::vector<int, std::allocator<int> > 
const&) ()
#3  0x0000007c4e2491ce in 
content::GpuCommandBufferStub::OnInitialize(base::FileDescriptor, 
IPC::Message*) ()
#4  0x0000007c4e24ab4e in 
content::GpuCommandBufferStub::OnMessageReceived(IPC::Message const&) ()
#5  0x0000007c4e236c15 in content::MessageRouter::RouteMessage(IPC::Message 
const&) ()
#6  0x0000007c4e243c9a in content::GpuChannel::HandleMessage() ()
#7  0x0000007c4b5cb0f3 in base::debug::TaskAnnotator::RunTask(char const*, char 
const*, base::PendingTask const&) ()
#8  0x0000007c4b58ab18 in base::MessageLoop::RunTask(base::PendingTask const&) 
()
#9  0x0000007c4b58ada9 in 
base::MessageLoop::DeferOrRunPendingTask(base::PendingTask const&) ()
#10 0x0000007c4b58c56e in base::MessageLoop::DoWork() ()
#11 0x0000007c4b5c35eb in 
base::MessagePumpGlib::Run(base::MessagePump::Delegate*) ()
#12 0x0000007c4b59d9a4 in base::RunLoop::Run() ()
#13 0x0000007c4b5890cc in base::MessageLoop::Run() ()
#14 0x0000007c4e11bd3d in content::GpuMain(content::MainFunctionParams const&) 
()
#15 0x0000007c4b538f97 in content::ContentMainRunnerImpl::Run() ()
#16 0x0000007c4b537a2b in content::ContentMain(content::ContentMainParams 
const&) ()
#17 0x0000007c4aff31fb in ChromeMain ()
#18 0x0000032b46b03f1b in __libc_start_main () from /lib64/libc.so.6
#19 0x0000007c4aff3079 in _start ()

Reply at: https://bugs.launchpad.net/ubuntu/+source/chromium-
browser/+bug/1378627/comments/6

------------------------------------------------------------------------
On 2014-09-08T15:30:13+00:00 Haagch wrote:

Oh right, I had noticed that the gpu threads are segfaulting, but
totally forgot that it could be relevant here.

Ivy Bridge here:

Core was generated by `/opt/google/chrome-unstable/chrome --type=gpu-process 
--channel=21942.4.5215851'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f84164044b8 in get_stencil_miptree (irb=0xf09fc2270b0) at 
brw_misc_state.c:225
225        if (irb->mt->stencil_mt)
(gdb) bt full
#0  0x00007f84164044b8 in get_stencil_miptree (irb=0xf09fc2270b0) at 
brw_misc_state.c:225                                                            
                                                                                
                                                                           
No locals.                                                                      
                                                                                
                                                                                
                                                                
#1  0x00007f8416404551 in brw_workaround_depthstencil_alignment 
(brw=0xf09fd940030, clear_mask=50) at brw_misc_state.c:241                      
                                                                                
                                                                                
        ctx = 0xf09fd940030                                                     
                                                                                
                                                                                
                                                                
        fb = 0xf09fea11200                                                      
                                                                                
                                                                                
                                                                
        rebase_depth = false                                                    
                                                                                
                                                                                
                                                                
        rebase_stencil = false                                                  
                                                                                
                                                                                
                                                                
        depth_irb = 0xf09fc22af20                                               
                                                                                
                                                                                
                                                                
        stencil_irb = 0xf09fc2270b0                                             
                                                                                
                                                                                
                                                                
        depth_mt = 0x0                                                          
                                                                                
                                                                                
                                                                
        stencil_mt = 0xf09fd9717c0                                              
                                                                                
                                                                                
                                                                
        tile_x = 32767                                                          
                                                                                
                                                                                
                                                                
        tile_y = 2049073776                                                     
                                                                                
                                                                                
                                                                
        stencil_tile_x = 3849                                                   
                                                                                
                                                                                
                                                                
        stencil_tile_y = 4254335024                                             
                                                                                
                                                                                
                                                                
        stencil_draw_x = 4271968768                                             
                                                                                
                                                                                
                                                                
        stencil_draw_y = 3849                                                   
                                                                                
                                                                                
                                                                
        invalidate_depth = 255                                                  
                                                                                
                                                                                
                                                                
        invalidate_stencil = false                                              
                                                                                
                                                                                
                                                                
        tile_mask_x = 4254335024                                                
                                                                                
                                                                                
                                                                
        tile_mask_y = 3849                                                      
                                                                                
                                                                                
                                                                
#2  0x00007f84163a6ff3 in brw_clear (ctx=0xf09fd940030, mask=50) at 
brw_clear.c:235                                                                 
                                                                                
                                                                            
        brw = 0xf09fd940030                                                     
                                                                                
                                                                                
                                                                
        fb = 0xf09fea11200                                                      
                                                                                
                                                                                
                                                                
        partial_clear = false                                                   
                                                                                
                                                                                
                                                                
        tri_mask = 4254335024                                                   
                                                                                
                                                                                
                                                                
#3  0x00007f841603028b in _mesa_Clear (mask=17664) at 
../../src/mesa/main/clear.c:226                                                 
                                                                                
                                                                                
          
        bufferMask = 50                                                         
                                                                                
                                                                                
                                                                
        ctx = 0xf09fd940030                                                     
                                                                                
                                                                                
                                                                
        __func__ = "_mesa_Clear"                                                
                                                                                
                                                                                
                                                                
        __PRETTY_FUNCTION__ = "_mesa_Clear"                                     
                                                                                
                                                                                
                                                                
#4  0x00007f842933836a in ?? ()                                                 
                                                                                
                                                                                
                                                                
No symbol table info available.                                                 
                                                                                
                                                                                
                                                                
#5  0x0000000000000000 in ?? ()                                                 
                                                                                
                                                                                
                                                                
No symbol table info available.

Reply at: https://bugs.launchpad.net/ubuntu/+source/chromium-
browser/+bug/1378627/comments/7

------------------------------------------------------------------------
On 2014-10-02T19:39:37+00:00 Haagch wrote:

For the people only reading this bug report:

In IRC keithp found the cause.
With dri3 temporary files are created with O_TMPFILE.
The chromium sandbox does not allow creating temporary files with O_TMPFILE.

So another workaround for now is to use chromium/chrome with the --no-
sandbox option (which will possibly reduce security).

There's a corresponding bugreport at chromium that was not publicly visible 
before, but now is:
https://code.google.com/p/chromium/issues/detail?id=415681#c9

Close this with NOTOURBUG/WONTFIX?

Reply at: https://bugs.launchpad.net/ubuntu/+source/chromium-
browser/+bug/1378627/comments/8

------------------------------------------------------------------------
On 2014-11-14T22:34:44+00:00 Haagch wrote:

It's getting fixed in chromium, so no action is necessary for mesa:

https://code.google.com/p/chromium/issues/detail?id=415681#c52
"who has the long-term fix almost ready."

I suggest keeping this here open until chromium is actually fixed and
then closing it.

Reply at: https://bugs.launchpad.net/ubuntu/+source/chromium-
browser/+bug/1378627/comments/21

------------------------------------------------------------------------
On 2014-12-23T00:00:59+00:00 Haagch wrote:

Resolved upstream - their sandbox allows the creation of the necessary
files now (at least in testing releases).

Reply at: https://bugs.launchpad.net/ubuntu/+source/chromium-
browser/+bug/1378627/comments/27

------------------------------------------------------------------------
On 2015-02-05T01:18:38+00:00 Chris Bainbridge wrote:

*** Bug 82793 has been marked as a duplicate of this bug. ***

Reply at: https://bugs.launchpad.net/ubuntu/+source/chromium-
browser/+bug/1378627/comments/29


** Changed in: mesa
       Status: Unknown => Won't Fix

** Changed in: mesa
   Importance: Unknown => Medium

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