diff options
| -rw-r--r-- | src/libXNVCtrlAttributes/NvCtrlAttributesUtils.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/libXNVCtrlAttributes/NvCtrlAttributesUtils.c b/src/libXNVCtrlAttributes/NvCtrlAttributesUtils.c index f20108d..b18c199 100644 --- a/src/libXNVCtrlAttributes/NvCtrlAttributesUtils.c +++ b/src/libXNVCtrlAttributes/NvCtrlAttributesUtils.c @@ -685,6 +685,23 @@ static CtrlTarget *nv_alloc_ctrl_target(CtrlSystem *system, t->targetTypeInfo = targetTypeInfo; /* + * detect if the given GPU is visible to the X server and silently fail if + * it is not; if there is a discrepency between NVML and NV-CONTROL, such as + * an eGPU that is invisible to X due to Option "AllowExternalGpus" "true" + * not being specified in xorg.conf, it can cause errors down the line. + */ + + if (target_type == GPU_TARGET) { + /* NV_CTRL_DEPTH_30_ALLOWED expected to succeed for any valid device */ + status = NvCtrlGetAttribute(t, NV_CTRL_DEPTH_30_ALLOWED, &d); + if (status != NvCtrlSuccess) { + nvfree(t); + NvCtrlAttributeClose(handle); + return NULL; + } + } + + /* * get a name for this target; in the case of * X_SCREEN_TARGET targets, just use the string returned * from NvCtrlGetDisplayName(); for other target types, |