Cheers, This error message usually deals with a couple of situations:
1) Actual lack of permissions (POSIX bits in devfs) - usually solved by `udev` or similar subsystem that handles hotplug HW for the OS. Or by running the driver as root and not losing the privileges (user=root in ups.conf) as a temporary fix and check that this is the case at all; 2) Someone else has hold of the device and libusb can't take it as exclusively as NUT needs (lsof/fuser/... to check if any other programs hold it - maybe another copy of your driver program in debugger etc). Happy Thanksgiving, Jim On Tue, Nov 26, 2024 at 4:37 AM William R. Elliot <b...@wreassoc.com> wrote: > Hello again. > > The USB device table in the driver I am working on has two entries for the > particular vendor ID I am working with, one for each of two product > IDs...0x0001 and 0x0002. The driver properly matches and can open the > device with the 0x0002 product ID. However, running the same driver with > the 0x0001 ups attached matches but fails to open. > > This is the relevent output following a successful match and trying to > open the device: > > 0.002511 [D2] Checking device 2 of 5 (1234/0001) > 0.002564 [D1] Failed to open device (1234/0001), skipping: Access > denied (insufficient permissions) > > My expectation would be that either device, once matched, would be able to > be opened and then further steps can be taken to confirm that the driver is > communicating with an expected device. > > I would appreciate any pointers toward something I may have missed. > > Thank you, > > Bill > > Happy Thanksgiving to the U.S. folks! > > > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > Virus-free.www.avg.com > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > <#m_-6725320979215136950_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > _______________________________________________ > Nut-upsdev mailing list > Nut-upsdev@alioth-lists.debian.net > https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/nut-upsdev >
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