-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Karl Palsson <ka...@tweak.net.au> wrote: > Hi, > > I've got a custom board with an onboard USB flash media > interface. It works well, I can mount and access micro SD cards > nicely, and all that basic stuff. > > However, card detection doesn't work. The USB flash interface > is Mass Storage Bulk Only, and on my desktop linux system, > there's a period task polling the device every two seconds, > sending SCSI "TEST UNIT READY" and "REQUEST SENSE" commands, > and this happily detects card insertions/removals, (after the > next poll) > > On openwrt, this doesn't happen. With usbmon I don't see any > periodic traffic. Calling "block info" manually reliably detect > any changes and gets new device nodes created, that works just > fine, but do I really need to call that periodically myself? > > Is this how it's meant to be? Am I missing some important > package or config? I'm not asking about automounting, there's > plenty of wiki help and options for that, but how do I get the > card to be detected at all? >
fwiw, originally, the values of the kernel block checking task were: # cat /sys/block/sda/events_poll_msecs - -1 # cat /sys/module/block/parameters/events_dfl_poll_msecs 0 And changing them to 2000 had no effect at all. https://github.com/surkovalex/openpctv/blob/master/packages/systemd/patches/Set-default-polling-interval-on-removable-devices-as.patch and others imply that those settings have no impact when the block module is compiled in, as appears to be the case on OpenWrt. So I've added a new patch that changes the default to 2000, but I still get no events of any sort when a card is plugged in or removed. Still, running "block info" will happily rescan and create/delete the /dev/sda1 node. Sincerely, Karl Palsson -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAEBAgAGBQJWColAAAoJEBmotQ/U1cr2lYIP/RPk5aFutiA90KL3gkImXdM8 TUUgMs7ICxwJSsFlGVMaYGR5PDkj6v6Xfy2nShJjYC4wdMOTFlL2bn7aTaLd8eep aQYrwv0dFSNEd49zBvkbpdJvarEe+ZJtcwYD9dCZQCGbyjxZ0ZgfQDDlGL0oDxoG 205pgfXTSNUAuqVGYc5dFvZeK7rfbTnqIES06XnOo2hn5AAHpKWMy40OUc1clPdF ka+4uqnh4978NOovzABk+Wbwj9s746m0Yp2U/StLi5clr8w11fT8x5N70apYQNk1 9uBEIwZOPyZzc1MYIaqOOLW4aHrZoEwY6GxpuBGCKkX7j7AMNk9LqFc8omSnjl+D B+OHWlzGdpQ5/Wsexvt0YJjfIlRvlksTIoOQH+H+B5L7gpKBvTJiRyLu7Psd4R3a zppzi+8O6pwjPRiUa6Z/p1vZe0XAeac66ebhkqGbQtP5J71V4MpNLNFkGF+86ylF h9Y2hM4fTfoP7+5cr9Ral0ncrvly543/GiC3Us9ziPHZThZqAOxHzOxiQLYfqud9 jhbwE7ufNQojTlWDMQXL6QHddhI/jAOAvppoOzZfdSI4+Ee3ivYVRMFIhulFwIr6 aXO3HBtMJk2r2rukkl2WtFjML7pjiyDT+IPH3xVd4vS7u9SFRVVpcamx0Ed20roZ EbkAGRK09Cz9X751aOPy =qAKt -----END PGP SIGNATURE-----
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