Hello everyone, now that I'm using the newly merged sur40 video driver in a development environment, I've noticed that a custom V4L2 application we've been using in our lab will sometimes trigger a hard lockup of the machine (_nothing_ works anymore, no VT switching, no network, not even Magic SysRq). This doesn't happen with plain old cheese or v4l2-compliance, only with our custom application and only under X11, i.e. as far as I can tell, when the input device is being polled at the same time. However, I have a really hard time tracking this down, as even SysRq doesn't work anymore. A console continuously dumping dmesg or strace of our tool didn't really help, either. I assume that somehow the input_polldev thread is put to sleep/waiting for a lock due to the video functions and that causes the lockup, but I can't really tell where that might happen. Can somebody with better knowledge of the internals give some suggestions? Thanks & best regards, Florian -- SENT FROM MY DEC VT50 TERMINAL
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