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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - i915/DRM Gallium driver apparently not usable without DRM pipe loader"
href="https://bugs.freedesktop.org/show_bug.cgi?id=75453">75453</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>i915/DRM Gallium driver apparently not usable without DRM pipe loader
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>christian.prochaska@genode-labs.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Component</th>
<td>Drivers/Gallium/i915g
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr></table>
<p>
<div>
<pre>(git master 73b46136b0ba20f7f84abdadad895111a4c37166)
I've built Mesa with the following configuration:
./autogen.sh --enable-gles2 --disable-glx --with-dri-drivers=
--enable-gallium-egl --with-egl-platforms=drm --with-gallium-drivers=i915
With this configuration, both a DRI driver and a Gallium driver get built,
despite the --with-dri-drivers= configure option (bug or intended?).
Then I've built the 'es2gears' demo as follows:
gcc -g -O0 -DMESA_EGL_NO_X11_HEADERS -o es2gears es2gears.c
../eglut/eglut_screen.c ../eglut/eglut.c -I../eglut -lGLESv2 -lEGL -lm
When I tried to run it on an IBM T60 notebook (Debian testing), at first <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Use of uninitialized pointer in 'gallium_screen_create()'"
href="show_bug.cgi?id=75335">bug
75335</a> triggered. Now that this bug has been resolved, the following error
occured:
-----
EGL_VERSION = 1.4 (DRI2)
EGLUT: failed to choose a config
-----
When I deleted the DRI driver, the following error occured:
-----
gbm: failed to open any driver (search paths /usr/local/lib/dri)failed to load
driver: i915
gbm: failed to open any driver (search paths /usr/local/lib/dri)failed to load
driver: i915
gbm: failed to open any driver (search paths /usr/local/lib/dri)failed to load
driver: i915
EGLUT: failed to initialize EGL display
-----
Apparently, the Gallium driver was not usable, too. Since <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Use of uninitialized pointer in 'gallium_screen_create()'"
href="show_bug.cgi?id=75335">bug 75335</a> got
triggered by the missing DRM pipe loader, I tried to enable it with the
following modification of configure.ac:
-----
index ba158e8..feb025f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1748,6 +1748,7 @@ if test "x$with_gallium_drivers" != x; then
xi915)
HAVE_GALLIUM_I915=yes
PKG_CHECK_MODULES([INTEL], [libdrm_intel >=
$LIBDRM_INTEL_REQUIRED])
+ gallium_require_drm_loader
GALLIUM_DRIVERS_DIRS="$GALLIUM_DRIVERS_DIRS i915 softpipe"
if test "x$MESA_LLVM" = x1; then
GALLIUM_DRIVERS_DIRS="$GALLIUM_DRIVERS_DIRS llvmpipe"
-----
With that, the demo finally worked:
-----
EGL_VERSION = 1.4 (Gallium)
Found 6 modes:
0: 1400 x 1050
1: 1400 x 1050
2: 1280 x 1024
3: 1024 x 768
4: 800 x 600
5: 640 x 480
Will use screen size: 1400 x 1050
vertex shader info:
fragment shader info:
info:
724 frames in 5.0 seconds = 144.713 FPS
-----
So it seems that the DRM pipe loader should get enabled by default for the
i915/DRM Gallium configuration, but I'm not sure if the modification I made
would break some other configuration.</pre>
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