On 02/05/2018 11:20 AM, Mario Kleiner wrote:
Commit 91c42093b248 ("glx: Duplicate relevant fbconfigs for
compositing visuals") adds many new depth 32 fbconfigs as
composite visuals. On a X-Screen running at depth 24, this
also adds bgra 10-10-10-2 fbconigs, as they also have
config.rgbBits == 32, but these are not displayable on a
depth 24 screen, leading to visually corrupted desktops
under some compositors, e.g., fdo bug 104597 "Compton
weird colors" when running compton with
"compton --backend glx".

Be more conservative for now and only select fbconfigs with
8 bpc red, green, blue components for composite visuals.

Fixes: 91c42093b248 ("glx: Duplicate relevant fbconfigs for
                       compositing visuals")
Bugzilla: 
https://urldefense.proofpoint.com/v2/url?u=https-3A__bugs.freedesktop.org_show-5Fbug.cgi-3Fid-3D104597&d=DwIBAg&c=uilaK90D4TOVoH58JNXRgQ&r=wnSlgOCqfpNS4d02vP68_E9q2BNMCwfD2OZ_6dCFVQQ&m=IbtkCrmjzJVhB0PdaE0y9A3Zqx2CEYhUPvtI6PeGSEo&s=6MOlztrQC3tRtcJvqesPVJ1ri_ILRWLMh-iZbrs7NJ0&e=
Signed-off-by: Mario Kleiner <[email protected]>
Cc: Thomas Hellstrom <[email protected]>
Cc: Adam Jackson <[email protected]>
---
  glx/glxdricommon.c | 3 +++
  1 file changed, 3 insertions(+)

diff --git a/glx/glxdricommon.c b/glx/glxdricommon.c
index d3136e8..dbf199c 100644
--- a/glx/glxdricommon.c
+++ b/glx/glxdricommon.c
@@ -218,6 +218,9 @@ createModeFromConfig(const __DRIcoreExtension * core,
      if (duplicateForComp &&
          (render_type_is_pbuffer_only(renderType) ||
           config->config.rgbBits != 32 ||
+         config->config.redBits != 8 ||
+         config->config.greenBits != 8 ||
+         config->config.blueBits != 8 ||
           config->config.visualRating != GLX_NONE ||
           config->config.sampleBuffers != 0)) {
          free(config);

LGTM.

Reviewed-by: Thomas Hellstrom <[email protected]>


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