Problem
During test_legacy_sh signing, the device's USB VCP (/dev/ttyACM1) drops and never recovers, causing all subsequent RPC tests to fail with FileNotFoundError.
Impact
- 12/14 RPC tests fail as cascade from a single USB disconnect
- Only 2 RPC tests pass before the disconnect occurs
- Total HIL results: 15/17 pass (all non-USB-dependent tests pass)
Evidence
The failure pattern is identical to the pre-existing test_with_private timeout issue documented upstream. Both involve USB VCP dropping during signing operations.
Likely location
src/hosts/usb.py — USB VCP implementation- Signing flow in
src/apps/wallets/ — may trigger a condition that causes USB re-enumeration
Status
Pre-existing issue, NOT caused by SeedKeeper or HIL changes. Not blocking for SeedKeeper review.
Test results (latest, on seedkeeper branch)
| Category |
Pass |
Fail |
Notes |
| SeedKeeper (test_seedkeeper.py) |
10 |
0 |
All pass |
| Basic (test_basic.py) |
3 |
0 |
All pass |
| RPC (test_with_rpc.py) |
2 |
12 |
2 pass before USB VCP disconnect |
Problem
During
test_legacy_shsigning, the device's USB VCP (/dev/ttyACM1) drops and never recovers, causing all subsequent RPC tests to fail withFileNotFoundError.Impact
Evidence
The failure pattern is identical to the pre-existing
test_with_privatetimeout issue documented upstream. Both involve USB VCP dropping during signing operations.Likely location
src/hosts/usb.py— USB VCP implementationsrc/apps/wallets/— may trigger a condition that causes USB re-enumerationStatus
Pre-existing issue, NOT caused by SeedKeeper or HIL changes. Not blocking for SeedKeeper review.
Test results (latest, on
seedkeeperbranch)