i915 driver/i945 hardware: mir_demo_client_eglplasma exits immediately and silently

[Daniel van Vugt]

On i945 systems (Pentium D and Atom N270 at least), mir_demo_client_eglplasma exits immediately, and silently.

[Daniel van Vugt (vanvugt)]

Improvement! With the latest vivid (Mesa 10.5), it actually works, kind of. But so slow it's pointless. This is from 1920x1200:

[1427100274.649897] perf: .mir_demo_client_eglplasma-uninstalled: 0.09 FPS, render time 10154.36ms, buffer lag 0.00ms (1 buffers)
[1427100285.094331] perf: .mir_demo_client_eglplasma-uninstalled: 0.09 FPS, render time 10443.43ms, buffer lag 0.00ms (1 buffers)
[1427100295.542456] perf: .mir_demo_client_eglplasma-uninstalled: 0.09 FPS, render time 10434.16ms, buffer lag 0.00ms (1 buffers)

You have to make the window really small to see anything that looks like actual animation:

# env MIR_CLIENT_PERF_REPORT=log bin/mir_demo_client_eglplasma -s 100x100
...
[1427100512.062754] perf: .mir_demo_client_eglplasma-uninstalled: 21.13 FPS, render time 47.01ms, buffer lag 42.27ms (2 buffers)
[1427100513.077899] perf: .mir_demo_client_eglplasma-uninstalled: 21.67 FPS, render time 45.80ms, buffer lag 46.47ms (2 buffers)
[1427100514.101317] perf: .mir_demo_client_eglplasma-uninstalled: 21.50 FPS, render time 46.19ms, buffer lag 46.83ms (2 buffers)

[Daniel van Vugt (vanvugt)]

Confirmed fixed on both machines when upgraded to the latest vivid with Mesa 10.5.

They're hopelessly slow to run eglplasma, but they do run it.

[Daniel van Vugt (vanvugt)]

--> bug 1583532