Roland Tollenaar wrote: >>> between RTdevices and non-RT devices crash the system? And whether I >>> understand correctly that later versions (2.4 up?) of xenomai do not >>> have the problem of the freezing system at least.? >> Since Xenomai 2.3, actually, no system is supposed to "crash" anymore >> when IRQ conflicts between the domains arise. But if you loose, e.g., >> your USB keyboard or your serial console or whatever input device due to >> a conflict, you may get the impression of a crash. However, if anyone >> suspects that something else happens on his system, please report the >> findings to the Xenomai mailing list! > > The systems I have found to "crash" all used PS/2 input device and > normal VGA monitor. Generally a freeze is initiated by some grafical > action in X after starting rtnet. dmesg will tell me that there is a
If there is a conflict with your graphic adapter, using a VESA X driver or disabling acceleration (Option "NoAccel") should remove the need to use the related IRQ under Linux. > shared IRQ, and in some cases it will disable it. In the latter case the > system does not freeze but I still have to find another IRQ address. > When there is a shared interrupt then there might be a freeze. If it > does not freeze immediately it never freezes and the shared IRQ is no > problem. For a while I thought there was only a problem with the VGA > device and the rtnet card so if I kept those two off the same IRQ there > would be no problem. On other machines this theory was brutally smashed. > Sorry I cannot be more specific here since all problems in the end are > "solved". > > Hmm, I am just considering that since I use live linux it may be that > the conflict was between the rtnet card and a USBport that gives access > to the usbstick(s). > > But my question remains -purely out of interest- why non-rt devices and > rt devices can _fundamentally_ not share an IRQ? > > kind > > regards, > > Roland. > > Jan
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