<html><head></head><body>Hello,<br><br>I'm running a QtQuick application using shaders on an older Intel(R) Atom(TM) CPU N270 @ 1.60GHz with Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller.<br><br>My setup is <br> * Ubuntu 16.04 (32-bit)<br> * Qt 5.9.2<br> * Mesa: 17.4.0<br> * Intel i8xx, i9xx display driver: 2.99.917<br> * XServer: 1.18.4<br><br>The test application is the QtQuick samegame example. When I start the app with the INTEL_DEBUG=perf env variable i get the following messages<br><pre class="code-java">....
ENTER FALLBACK 10000: Program
LEAVE FALLBACK Program
i915_program_error: Exceeded max nr indirect texture lookups (6 out of 4)
...<br><br><font face="Roboto,"Segoe UI",Ubuntu,"lucida grande",tahoma,sans-serif">and the CPU load goes up to 100% and the app reacts very slow. Btw. is there another debugging/tracing configuration which i can use to narrow down the problem a bit more?<br></font><font face="Roboto,"Segoe UI",Ubuntu,"lucida grande",tahoma,sans-serif">With the perf or oprofile tool I see that the most CPU time is consumed by i915_dri.so.<br><br></font><font face="Roboto,"Segoe UI",Ubuntu,"lucida grande",tahoma,sans-serif">Are there any known regressions regarding QtQuick/Qt 5/Shaders and the i915 driver on Ubuntu 16.04</font>.<br></pre><br>Regards<br>-<br>Benjamin Federau<br><br>--
<br>
<br>M.Sc. Benjamin Federau
<br>Integration Engineer
<br>
<br>basysKom GmbH
<br>Robert-Bosch-Str. 7 | 64293 Darmstadt | Germany
<br><a href="mailto:benjamin.federau@basyskom.com" class="mailto">benjamin.federau@basyskom.com</a> | <a id="ext-gen3013" href="http://www.basyskom.com" target="_blank">www.basyskom.com</a>
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