Created attachment 620389 [details] gdb Description of problem: rogram received signal SIGHUP, Hangup. [Switching to Thread 0x7fba6f88e700 (LWP 4369)] pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:165 165 62: movl (%rsp), %edi Version-Release number of selected component (if applicable): kdelibs-4.9.1-4.fc18.x86_64 kde-workspace-4.9.1-6.fc18.x86_64 kde-runtime-4.9.1-1.fc18.x86_64 xorg-x11-server-Xorg-1.13.0-5.fc18.x86_64 xorg-x11-server-common-1.13.0-5.fc18.x86_64 How reproducible: randomly Steps to Reproduce: 1. Add launcher to plasma panel 2. Click on launcher Actual results: Xorg crashes Expected results: no crash Additional info: see backtrace
rpm -q qt please
> Xorg crashes Is it really the whole X which is crashing? If so, that's a bug somewhere inside X, most likely in the graphics driver, not in plasma-desktop. plasma-desktop is dumping core after getting a SIGHUP signal, but there is no evidence that plasma-desktop is the component at fault. The problem is that it is getting signaled in the first place.
it's always reproducible with llvmpipe OpenGL rendererglxi
qt-4.8.2-6.fc18.x86_64
iirc, kwin is blacklists software rendering (which includes llvmpipe) Are you suggesting that kwin opengl effects are on using llvmpipe?
I had to change rendering from XRender to OpenGL.
OpenGL desktop effects are not expected to work with llvmpipe at this time.
That said, it might be worth reassigning this bug to mesa, because the crash really looks like the driver's fault. But we'd need a backtrace for X, not plasma-desktop, because it's there that the crash originates.