ios info hangs on 'Looking for device UDID' but device is available and ideviceinfo -u responds immediately

[joao-borges-miw]

Describe the bug
Sometimes, ios info hangs on 'Looking for device UDID' but device is available and ideviceinfo -u responds immediately, which means the device is there and the connection is healthy.

To Reproduce
Steps to reproduce the behavior:
I don't know exactly what triggers this situation, but it has been happening frequently for me with multiple iPhones in various servers.

Expected behavior
ios info should return the info given the device is there and reachable.

Screenshots

[me@server 00008110-001914C01A05401E]$ ios info --udid=00008110-001914C01A05401E -v
{"level":"info","msg":"Set Debug mode","time":"2025-11-05T15:09:11-08:00"}
{"level":"debug","msg":"map[--address:\u003cnil\u003e --all:false --app:\u003cnil\u003e --apps:false --arg:[] --basedir:\u003cnil\u003e --binary:false --bundle-id:\u003cnil\u003e --bundleid:\u003cnil\u003e --certfile:\u003cnil\u003e --details:false --dstPath:\u003cnil\u003e --enable-post-restart:false --env:[] --filesharing:false --font:\u003cnil\u003e --force:false --gpxfilepath:\u003cnil\u003e --help:false --iface:\u003cnil\u003e --kill-existing:false --lang:false --lat:\u003cnil\u003e --list:false --locale:false --log-output:\u003cnil\u003e --lon:\u003cnil\u003e --mode:\u003cnil\u003e --nojson:false --orgname:\u003cnil\u003e --output:\u003cnil\u003e --p12file:\u003cnil\u003e --pair-record-path:\u003cnil\u003e --parse:false --password:\u003cnil\u003e --path:\u003cnil\u003e --pid:\u003cnil\u003e --plist:false --port:\u003cnil\u003e --pretty:false --process:\u003cnil\u003e --proxyurl:\u003cnil\u003e --r:false --rsd-port:\u003cnil\u003e --setlang:\u003cnil\u003e --setlocale:\u003cnil\u003e --skip:[] --skip-all:false --srcPath:\u003cnil\u003e --stop-at-entry:false --stream:false --system:false --test-runner-bundle-id:\u003cnil\u003e --test-to-run:[] --test-to-skip:[] --testrunnerbundleid:\u003cnil\u003e --trace:false --tunnel-info-port:\u003cnil\u003e --udid:00008110-001914C01A05401E --userspace:false --userspace-port:\u003cnil\u003e --verbose:true --version:false --wait:false --xctest:false --xctest-config:\u003cnil\u003e --xctestconfig:\u003cnil\u003e --xctestrun-file-path:\u003cnil\u003e 12h:false 24h:false \u003capp_path\u003e:\u003cnil\u003e \u003cbundleID\u003e:\u003cnil\u003e \u003ccwd\u003e:\u003cnil\u003e \u003chost\u003e:\u003cnil\u003e \u003chostPort\u003e:\u003cnil\u003e \u003ckey\u003e:[] \u003cpass\u003e:\u003cnil\u003e \u003cpattern\u003e:\u003cnil\u003e \u003cport\u003e:\u003cnil\u003e \u003cprofileFile\u003e:\u003cnil\u003e \u003cprofileId\u003e:\u003cnil\u003e \u003cprofileName\u003e:\u003cnil\u003e \u003cprofileTypeId\u003e:\u003cnil\u003e \u003csrcpattern\u003e:\u003cnil\u003e \u003ctarget\u003e:\u003cnil\u003e \u003ctargetPort\u003e:\u003cnil\u003e \u003cuser\u003e:\u003cnil\u003e activate:false add:false apps:false assistivetouch:false auto:false ax:false batterycheck:false batteryregistry:false cp:false crash:false create-cert:false date:false debug:false devicename:false devicestate:false devmode:false diagnostics:false disable:false diskspace:false display:false dproxy:false enable:false erase:false forward:false fsync:false get:false httpproxy:false image:false info:true install:false instruments:false ip:false kill:false lang:false launch:false list:false listen:false lockdown:false ls:false memlimitoff:false mkdir:false mobilegestalt:false mount:false notifications:false pair:false pcap:false prepare:false printskip:false profile:false ps:false pull:false push:false readpair:false reboot:false remove:false resetax:false resetlocation:false rm:false rsd:false runtest:false runwda:false runxctest:false screenshot:false setlocation:false setlocationgpx:false start:false stopagent:false syslog:false sysmontap:false timeformat:false toggle:false tree:false tunnel:false uninstall:false unmount:false version:false voiceover:false zoom:false]","time":"2025-11-05T15:09:11-08:00"}
{"level":"debug","msg":"Looking for device '00008110-001914C01A05401E'","time":"2025-11-05T15:09:11-08:00"}
{"err":"newRsdServiceFromTcpConn: failed to connect to http2: NewHttpConnection: could not read frame. read tcp 127.0.0.1:56456-\u003e127.0.0.1:60112: read: connection reset by peer","level":"fatal","msg":"could not connect to RSD","time":"2025-11-05T15:10:15-08:00"}

Desktop (please complete the following information):

• OS: Red Hat Linux
• Version 8.10

Smartphone (please complete the following information):

• Device: iPhone 14
• OS: ios 26

Additional context
Add any other context about the problem here.

[aluedeke]

@joao-borges-miw Are you running commands in parallel against the devices? If so how many (roughly) and which commands. I have seen recently similar issues when opening multiple portforwards at the same time. I believe its not because of the portforwards btw.

[joao-borges-miw]

@aluedeke yes, I am. My use case has up to 8 phones simultaneously, iOS versions ranging to 18.1 to 26 and I use the below commands, not really in any order or frequency:

• list
• info
• apps
• Forward (long living)
• Syslog
• Runwda
• Devicename

And there may be others I do not recall now.

[joao-borges-miw]

@aluedeke one important piece of information is that after I logged this issue I found out that sometimes not even unplugging physically the iPhone and replugging it is enough to fix the issue, sometimes I have to restart usbmuxd or even the entire machine, so it means this may be a race condition on a lower level component.