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diff --git a/src/backends/x11/meta-output-xrandr.c b/src/backends/x11/meta-output-xrandr.c
index 1f44cb168..1ea404453 100644
--- a/src/backends/x11/meta-output-xrandr.c
+++ b/src/backends/x11/meta-output-xrandr.c
@@ -119,6 +119,41 @@ output_set_underscanning_xrandr (MetaOutput *output,
}
}
+static int
+output_get_fglrx_kernel_module_loaded()
+{
+ /* Checks if fglrx module has been loaded by parsing /proc/modules.
+ * Returns 1 if the module was found (and thus has been loaded), 0 if the
+ * module was not found and -1 if /proc/modules couldn't be opened.
+ */
+
+ int retval = 0; // defaults to not found
+
+ FILE* fp;
+ char line[256];
+
+ fp = fopen("/proc/modules", "r");
+ if (!fp)
+ {
+ retval = -1;
+ }
+ else
+ {
+ while (fgets(line, sizeof(line), fp) != NULL)
+ {
+ char *entry = strtok(line, " \n");
+
+ if (strcmp(entry, "fglrx") == 0)
+ {
+ retval = 1;
+ break;
+ }
+ }
+ fclose(fp);
+ }
+ return retval;
+}
+
void
meta_output_xrandr_apply_mode (MetaOutput *output)
{
@@ -130,7 +165,11 @@ meta_output_xrandr_apply_mode (MetaOutput *output)
(XID) output->winsys_id);
}
- output_set_presentation_xrandr (output, output->is_presentation);
+ int fglrx_kernel_module_loaded = output_get_fglrx_kernel_module_loaded();
+
+ /* Don't call output_set_presentation_xrandr if fglrx/catalyst is used, because that causes a crash. */
+ if (fglrx_kernel_module_loaded != 1)
+ output_set_presentation_xrandr (output, output->is_presentation);
if (output->supports_underscanning)
output_set_underscanning_xrandr (output, output->is_underscanning);
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