| Summary: | X11 AMD/ATI fglrx driver SIGSEGV (XQueryExtension, _XSend) if multiple Display connections are used. | ||
|---|---|---|---|
| Product: | [JogAmp] Jogl | Reporter: | Sven Gothel <sgothel> |
| Component: | x11 | Assignee: | Sven Gothel <sgothel> |
| Status: | VERIFIED FIXED | ||
| Severity: | major | ||
| Priority: | --- | ||
| Version: | 2 | ||
| Hardware: | pc_all | ||
| OS: | linux | ||
| Type: | --- | SCM Refs: |
b54497155815852744adb657816cb4057948dae2
|
| Workaround: | TRUE | ||
| Attachments: | Multiple X11 Display Connection Test | ||
Since we cannot fix the driver .. this is a workaround avoiding SIGSEGV. We don't close the X11 Display connection if driver vendor is ATI via 'X11Util.markDisplayUncloseable(true)'. This is currently exercised in X11GLXDrawableFactory shared resource initialization. FIXME: To allow this workaround to function w/o JOGL usage, this detection and setting shall happen in X11Util itself, if we could query the driver vendor w/o GLX. |
Created attachment 265 [details] Multiple X11 Display Connection Test It is observed that ATI X11 drivers, eg. fglrx 8.78.6 upto fglrx 11.08/8.881, are quite sensitive to multiple Display connections. Here, closing displays shall happen in the same order as they were opened, -OR- shall not be closed at all! Otherwise some driver related bug appears and brings down the JVM with an SIGSEGV. You may test this, ie just reverse the destroy order below. See also native test: jogl/test/native/displayMultiple02.c (attached)