Date: Thu, 28 Jun 2001 18:36:33 -0400 (EDT) From: "Brandon S. Allbery KF8NH" <allbery@vpn45.ece.cmu.edu> To: FreeBSD-gnats-submit@freebsd.org Subject: misc/28494: ugen usable only from "attach" or by usbd trickery; timing issue? Message-ID: <200106282236.f5SMaX702647@vpn45.ece.cmu.edu>
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>Number: 28494 >Category: misc >Synopsis: ugen usable only from "attach" or by usbd trickery; timing issue? >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Jun 28 15:40:01 PDT 2001 >Closed-Date: >Last-Modified: >Originator: Brandon S. Allbery KF8NH >Release: FreeBSD 4.3-RELEASE i386 >Organization: Carnegie Mellon University Electrical & Compuer Engineering, Computing Facilities >Environment: System: FreeBSD vpn45.ece.cmu.edu 4.3-RELEASE FreeBSD 4.3-RELEASE #2: Thu May 10 14:58:58 EDT 2001 root@pyanfar.ece.cmu.edu:/usr/src/sys/compile/PYANFAR i386 coldsync 2.1.2 >Description: Establishing communication with a Handspring Visor via USB is not reliable. The expected method (start hotsync program, initiate hotsync on Visor) fails most of the time; the following sequence, however, works most of the time: 1. kill usbd 2. run hotsync program 3. initiate hotsync on Visor 4. wait 5-10 seconds 5. restart usbd The failure mode is that the Visor is detected by usbd and the ugen driver is associated with it, but there is no data transferred and when the Visor times out the ugen read fails with an I/O error. Reportedly invoking the hotsync program via an "attach" in usbd.conf works as expected. This is somewhat suboptimal when performing relatively rare operations such as restoring a backup. It also suggests that there may be a timing issue involved, where the connect will only succeed if it takes place sufficiently soon after the ugen driver is associated with the Visor. Other USB devices seem to work as expected (e.g. USB keyboard and mouse) but this is expected because the devices are activated (if needed) via "attach" statements. ugen should be more general. >How-To-Repeat: - Obtain a Handspring Visor or (probably) one of the USB Palm devices. - Install ports/palm/coldsync (pilot-link doesn't know how to use ugen) and configure it appropriately. - Attempt to connect to the Visor: vpn45:4996 Z$ coldsync -ms Please press the HotSync button. (it just sits here until the Visor times out the connect) usb read: Input/output error slp_read: read: Input/output error Error during cmp_read: (1) Error in system call or library function. Error: Can't connect to Palm. >Fix: >Release-Note: >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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