Hello,
I find a drmOpen failed issue in our system as below description:
platform: ivy-bridge
OS: Ubuntu12.04 LTS
kernel: 3.13.0-32-generic
libdrm: libdrm-2.4.46
root@tchen37-ivb:/home/tchen37/ws/lib3app/utests# ./test_osd
DRM_IOCTL_I915_GEM_APERTURE failed: Bad file descriptor
Assuming 131072kB available aperture size.
May lead to reduced performance or incorrect rendering.
get chip id failed: -1 [9]
param: 4, val: 0
Segmentation fault (core dumped)
by debugging libdrm code, I find following changes resolve the problem
diff --git a/xf86drm.c b/xf86drm.c
index 4791a05..3c7c362 100644
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -562,7 +562,7 @@ static int drmOpenByName(const char *name)
drmFreeVersion(version);
id = drmGetBusid(fd);
drmMsg("drmGetBusid returned '%s'\n", id ? id : "NULL");
- if (!id || !*id) {
+ if (id || *id) {
if (id)
drmFreeBusid(id);
return fd;
I know I'm not using the latest version of libdrm, but I confirm that latest code remains same for this scenario.
Is it possible a bug of libdrm?
Thanks,
-Jet
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