Date: Tue, 23 May 2017 17:37:52 +0300 From: Lev Serebryakov <lev@FreeBSD.org> To: Hans Petter Selasky <hps@selasky.org>, freebsd-usb@freebsd.org Subject: Re: Ippon Back Power Pro LCD connection flickers Message-ID: <e016ee75-a680-37f3-a84f-f97939265707@FreeBSD.org> In-Reply-To: <3ac65ccf-d75d-df65-df53-a0b6137b54c2@selasky.org> References: <1af248e4-50dd-8268-c378-bd5063929310@FreeBSD.org> <ca32090d-4b1d-59bc-7ea2-00836f2aa32d@selasky.org> <2e73775f-1d81-1e09-22fe-4d46c800b157@FreeBSD.org> <3ac65ccf-d75d-df65-df53-a0b6137b54c2@selasky.org>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --QcSkHHcuVJulcJvn3fuLUFD62mIsFil8M Content-Type: multipart/mixed; boundary="kS3KTxTSbWIh08DSrf9CI7sLC1SxAbXqO"; protected-headers="v1" From: Lev Serebryakov <lev@FreeBSD.org> Reply-To: lev@FreeBSD.org To: Hans Petter Selasky <hps@selasky.org>, freebsd-usb@freebsd.org Message-ID: <e016ee75-a680-37f3-a84f-f97939265707@FreeBSD.org> Subject: Re: Ippon Back Power Pro LCD connection flickers References: <1af248e4-50dd-8268-c378-bd5063929310@FreeBSD.org> <ca32090d-4b1d-59bc-7ea2-00836f2aa32d@selasky.org> <2e73775f-1d81-1e09-22fe-4d46c800b157@FreeBSD.org> <3ac65ccf-d75d-df65-df53-a0b6137b54c2@selasky.org> In-Reply-To: <3ac65ccf-d75d-df65-df53-a0b6137b54c2@selasky.org> --kS3KTxTSbWIh08DSrf9CI7sLC1SxAbXqO Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 22.05.2017 15:57, Hans Petter Selasky wrote: > What is the occurrence rate of this IOERROR? Once per attach/detach. >=20 > Did you try to connect the USB device to a different port and/or USB HU= B. >=20 > It might also be that the user-space driver tries to reset the device > when it sees this error. To figure that out you'll need to enable > debugging in the UPS software package. Hans, as here are some evidences, that Linux doesn't have this problem, I want to track down it and help you to fix it, if it is fixable on FreeBSD side (maybe, with some kludge for such devices). I know next to nothing about Linux and USB internals, but I'm ready to test patches, get any dumps, try to boot Linux on this hardware and get dumps there, etc. Thank you! --=20 // Lev Serebryakov --kS3KTxTSbWIh08DSrf9CI7sLC1SxAbXqO-- --QcSkHHcuVJulcJvn3fuLUFD62mIsFil8M Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQJ8BAEBCgBmBQJZJElAXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRGOTZEMUNBMEI1RjQzMThCNjc0QjMzMEFF QUIwM0M1OEJGREM0NzhGAAoJEOqwPFi/3EePhwwP/RFGb4blf26X0ktEJZRdLtkx oEpzphG58hBWVWzZ0aCbFxbZKYSUoa9rm/my4reZsDC+8KrMyZUFU1Lcgx9kiOfm d77Btc8w2e7KpdaTttHWm6mtZpqPlH5hURImPVOhzjn1eeVA+OHhwwF7Ta6aWgh2 T2Z1HHuamA3KpZ28S3nDu10xxSY0jPK7/nkB+20vmIY6CrSDOREUKnhtv5NU3ptT dNyawbljpbHp70V1FyqUFHDu03ulDCl8Yae6Lm7q4fnx36hTWOjPm8MWJHRVIBBi 21KRKBzOeOvpdEaz9BwxIL65L82S3sWA/sXae/B4y9i6COWwVtcKUzhYv/DiVt31 LWVYRHnAXNgHgCMuzZvIpIBUvytCW+8l816pouWCIqVgv7jDTnlvAaf1s8YUE89N SiiswR2U+tiM1sxnBbQgxPNgovhYFEGNJFTrJnAWfarXrhCCATwfn4J589rq33Jf OmzBOIXWka5d5+rJ6btzSogsgFgI2xPMh2hJQAVe8wyIQLW2dBLojdG5vqbgzmzn yE4vWSQOAEnj7QVgr3X5OsllstWG7X2plBD2u0MsUfJfbGdOM+Up+5d9+ioskJEa wSjASiQGGXhgdNh8XgTs8zpshSOCeakftyiarsM2fhqO9w4BzMOaaMfkhnzS2dca 1m9dEtmUtizZrjikTI1s =fxVb -----END PGP SIGNATURE----- --QcSkHHcuVJulcJvn3fuLUFD62mIsFil8M--
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