[Mesa-dev] Pending issues of lollipop-x86

[Emil Velikov]

On 25 September 2015 at 17:24, Rob Clark <robdclark at gmail.com> wrote:
> On Fri, Sep 25, 2015 at 11:43 AM, Chih-Wei Huang
> <cwhuang at android-x86.org> wrote:
>> CC to mesa-dev for help.
>>
>> 2015-09-25 22:12 GMT+08:00 Chih-Wei Huang <cwhuang at android-x86.org>:
>>> 2015-09-25 16:21 GMT+08:00 Chih-Wei Huang <cwhuang at android-x86.org>:
>>>> Actually I'm testing your mesa 11.0 branch
>>>> to see if it is acceptable.
>>>> The major issue I found is the
>>>> Camera and Youtube crashing in mesa.
>>>
>>> OK, I can almost confirm this is a known issue
>>> I reported to mesa devs before.
>>> It is caused by this commit:
>>>
>>> commit c636284ee8ee95bb3f3ad31aaf26a9512ec5006c
>>> Author: Chad Versace <chad.versace at intel.com>
>>> Date:   Tue May 5 19:05:32 2015 -0700
>>>
>>>     i965/sync: Implement DRI2_Fence extension
>>>
>>> By reverting it the crashing is gone.
>>>
>>> However, I still hope we can find
>>> a correct fix.
>>
>> After some debugging, it crashed in
>> dri2_client_wait_sync() of
>> ...src/egl/drivers/dri2/egl_dri2.c
>> The ctx returned by _eglGetCurrentContext()
>> is NULL.
>>
>> static EGLint
>> dri2_client_wait_sync(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync,
>>                       EGLint flags, EGLTime timeout)
>> {
>>    _EGLContext *ctx = _eglGetCurrentContext();
>>
>> ==> ctx is NULL
>>
>>    if (dri2_dpy->fence->client_wait_sync(dri2_ctx->dri_context,  <== OOPS!
>>                                          dri2_sync->fence, wait_flags,
>>                                          timeout))
>>
>>
>> Why does _eglGetCurrentContext() return NULL?
>> Any recommended fix?
>
> no idea offhand about fix, but I wonder if this is related to why
> 'about tablet' screen shows NULL for gl vendor/etc with lollipop?
>
Imho it sounds like the issue - missing eglMakeCurrent. I've recently
made the same mistake in xserver/glamor :'( Tracking down the buggy
application/framework might be 'interesting'.

-Emil