indi_celestron_aux times out when slew limits are hit

[ckuethe]

Describe the bug
At least on my AVX connected via the handset over usb, when slew limits are hit the mount stops responding. Not even parking works. I don't recall ever setting slew limits explicitly.

To Reproduce

1. Start Ekos
2. Unpark, track a target
3. Allow the mount to run into a slew limit
4. Observe that the mount stops responding (not even to a park request)
5. Disconnect from the mount
6. Attempt to reconnect to the mount
7. Observe that the mount does not connect successfully

Expected behavior
Even if the slew limit is hit, I would expect that I can stop tracking and return the mount to the home positions

Screenshots

Desktop (please complete the following information):

• OS: StellarMateOS 1.8.4
• Platform: StellarMateX SM-120
• Version: indi-celestronaux 1.3+z+stable202408111301 , kstars-bleeding 6:3.7.2+z+stable202408111330

Log Files

[2024-08-15T16:14:02.762 PDT INFO ][           org.kde.kstars.ekos] - "Enabling debug logging for Celestron Advanced VX Wired..."
[2024-08-15T16:14:02.805 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[INFO] Debug is enabled. "
[2024-08-15T16:14:02.805 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < DEBUG_LEVEL >
[2024-08-15T16:14:02.807 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < LOGGING_LEVEL >
[2024-08-15T16:14:02.808 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < LOG_OUTPUT >
[2024-08-15T16:14:02.811 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[INFO] Saving device configuration... "
[2024-08-15T16:14:02.811 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[INFO] Device configuration saved. "
[2024-08-15T16:14:02.848 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[DEBUG] Toggle Debug Level -- Serial "
[2024-08-15T16:14:03.071 PDT INFO ][           org.kde.kstars.ekos] - Connecting to "Celestron Advanced VX Wired"
[2024-08-15T16:14:03.113 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[DEBUG] Connecting to /dev/ttyUSB0 @ 9600 "
[2024-08-15T16:14:03.114 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[DEBUG] Port FD 3 "
[2024-08-15T16:14:03.114 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[DEBUG] Connection successful, attempting handshake... "
[2024-08-15T16:14:03.114 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[DEBUG] CAUX: connect 3 (serial) "
[2024-08-15T16:14:03.314 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[INFO] Setting serial speed to 9600 baud. "
[2024-08-15T16:14:03.364 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[CSER] CMD <56> "
[2024-08-15T16:14:03.365 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[CSER] aux_tty_read: 3 "
[2024-08-15T16:14:04.366 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[ERROR] Timeout error "
[2024-08-15T16:14:04.367 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[INFO] Detected Mount USB serial connection. "
[2024-08-15T16:14:04.367 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[DEBUG] Communicating with mount motor controllers... "
[2024-08-15T16:14:04.367 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[CAUX] CMD <     GET_VER>  APP ->  AZM "
[2024-08-15T16:14:04.416 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[CSER] CMD <3B 03 20 10 FE CF> "
[2024-08-15T16:14:04.416 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[CSER] aux_tty_read: 3 "
[2024-08-15T16:14:05.417 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[ERROR] Timeout error "
[2024-08-15T16:14:05.418 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[ERROR] Got no response from target ALT or AZM. "
[2024-08-15T16:14:05.418 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[ERROR] Cannot continue without connection to motor controllers. "
[2024-08-15T16:14:05.419 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[DEBUG] Handshake failed. "
[2024-08-15T16:14:07.569 PDT DEBG ][           org.kde.kstars.ekos] - Disconnecting  "Celestron Advanced VX Wired"
[2024-08-15T16:14:09.220 PDT DEBG ][           org.kde.kstars.indi] - Removing managed driver "Celestron AUX"
[2024-08-15T16:14:09.220 PDT DEBG ][           org.kde.kstars.indi] - Managed driver "Celestron AUX" has device "Celestron Advanced VX Wired" that will be removed
[2024-08-15T16:14:09.220 PDT DEBG ][           org.kde.kstars.indi] - INDIListener: Removing device "Celestron Advanced VX Wired"
[2024-08-15T16:14:09.224 PDT DEBG ][           org.kde.kstars.indi] - Stopping INDI Driver  "indi_celestron_aux"
[2024-08-15T16:14:09.227 PDT DEBG ][           org.kde.kstars.indi] - INDI server disconnected from BLOB manager for Device: "Celestron Advanced VX Wired" Property: "ALIGNMENT_POINT_OPTIONAL_BINARY_BLOB" Exit code: -1
[2024-08-15T16:14:21.598 PDT DEBG ][           org.kde.kstars.indi] - Starting INDI Driver "indi_celestron_aux"
[2024-08-15T16:14:21.607 PDT DEBG ][           org.kde.kstars.indi] - INDI Server:  "2024-08-15T23:14:21: FIFO: start indi_celestron_aux -n \"Celestron Advanced VX Wired\""
[2024-08-15T16:14:21.607 PDT DEBG ][           org.kde.kstars.indi] - INDI Server:  "2024-08-15T23:14:21: With name: Celestron Advanced VX Wired"
[2024-08-15T16:14:21.607 PDT DEBG ][           org.kde.kstars.indi] - INDI Server:  "2024-08-15T23:14:21: FIFO: Starting driver indi_celestron_aux"
[2024-08-15T16:14:21.607 PDT DEBG ][           org.kde.kstars.indi] - INDI Server:  "2024-08-15T23:14:21: Driver indi_celestron_aux: pid=8836 rfd=9 wfd=9 efd=10"
[2024-08-15T16:14:21.630 PDT DEBG ][           org.kde.kstars.indi] - INDI Server:  "2024-08-15T23:14:21: Driver indi_celestron_aux: snooping on Dome Simulator.DOME_PARK"
[2024-08-15T16:14:21.630 PDT DEBG ][           org.kde.kstars.indi] - INDI Server:  "2024-08-15T23:14:21: Driver indi_celestron_aux: snooping on Dome Simulator.DOME_SHUTTER"
[2024-08-15T16:14:21.630 PDT DEBG ][           org.kde.kstars.indi] - INDI Server:  "2024-08-15T23:14:21: Driver indi_celestron_aux: EnumeratePlugins - found plugin Nearest Math Plugin"
[2024-08-15T16:14:21.630 PDT DEBG ][           org.kde.kstars.indi] - INDI Server:  "2024-08-15T23:14:21: Driver indi_celestron_aux: EnumeratePlugins - found plugin SVD Math Plugin"
[2024-08-15T16:14:21.630 PDT DEBG ][           org.kde.kstars.indi] - INDI Server:  "2024-08-15T23:14:21: Driver indi_celestron_aux: snooping on Celestron Advanced VX Wired.ALIGNMENT_SUBSYSTEM_MATH_PLUGIN_INITIALISE"
[2024-08-15T16:14:21.650 PDT DEBG ][           org.kde.kstars.indi] - Adding managed driver "Celestron AUX"
[2024-08-15T16:14:21.658 PDT DEBG ][           org.kde.kstars.indi] - Received new device Celestron Advanced VX Wired
[2024-08-15T16:14:21.658 PDT DEBG ][           org.kde.kstars.indi] - Driver "Celestron AUX" is adding device Celestron Advanced VX Wired (exact match by label)
[2024-08-15T16:14:21.708 PDT DEBG ][           org.kde.kstars.indi] - INDIListener: New device "Celestron Advanced VX Wired"
[2024-08-15T16:14:21.708 PDT INFO ][           org.kde.kstars.ekos] - Ekos received a new device:  "Celestron Advanced VX Wired"
[2024-08-15T16:14:21.708 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < CONNECTION >
[2024-08-15T16:14:21.708 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < DRIVER_INFO >
[2024-08-15T16:14:21.708 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < POLLING_PERIOD >
[2024-08-15T16:14:21.708 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < DEBUG >
[2024-08-15T16:14:21.708 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < ALIGNMENT_POINT_MANDATORY_NUMBERS >
[2024-08-15T16:14:21.709 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < ALIGNMENT_POINT_OPTIONAL_BINARY_BLOB >
[2024-08-15T16:14:21.709 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < ALIGNMENT_POINTSET_SIZE >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < ALIGNMENT_POINTSET_CURRENT_ENTRY >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < ALIGNMENT_POINTSET_ACTION >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < ALIGNMENT_POINTSET_COMMIT >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < ALIGNMENT_SUBSYSTEM_MATH_PLUGINS >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < ALIGNMENT_SUBSYSTEM_MATH_PLUGIN_INITIALISE >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < ALIGNMENT_SUBSYSTEM_ACTIVE >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < CONFIG_PROCESS >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < DEBUG_LEVEL >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < LOGGING_LEVEL >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < LOG_OUTPUT >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < CONNECTION_MODE >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < SYSTEM_PORTS >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < DEVICE_PORT >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < DEVICE_BAUD_RATE >
[2024-08-15T16:14:21.710 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < DEVICE_AUTO_SEARCH >
[2024-08-15T16:14:21.711 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < DEVICE_PORT_SCAN >
[2024-08-15T16:14:21.713 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < ACTIVE_DEVICES >
[2024-08-15T16:14:21.713 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < DOME_POLICY >
[2024-08-15T16:14:21.713 PDT DEBG ][           org.kde.kstars.indi] - < Celestron Advanced VX Wired >: < PORT_TYPE >
[2024-08-15T16:14:21.734 PDT DEBG ][           org.kde.kstars.indi] - INDI Server:  "2024-08-15T23:14:21: Driver indi_asi_ccd: snooping on Celestron Advanced VX Wired.EQUATORIAL_EOD_COORD"
[2024-08-15T16:14:21.734 PDT DEBG ][           org.kde.kstars.indi] - INDI Server:  "2024-08-15T23:14:21: Driver indi_asi_ccd: snooping on Celestron Advanced VX Wired.EQUATORIAL_COORD"
[2024-08-15T16:14:21.734 PDT DEBG ][           org.kde.kstars.indi] - INDI Server:  "2024-08-15T23:14:21: Driver indi_asi_ccd: snooping on Celestron Advanced VX Wired.TELESCOPE_INFO"
[2024-08-15T16:14:21.734 PDT DEBG ][           org.kde.kstars.indi] - INDI Server:  "2024-08-15T23:14:21: Driver indi_asi_ccd: snooping on Celestron Advanced VX Wired.GEOGRAPHIC_COORD"
[2024-08-15T16:14:21.734 PDT DEBG ][           org.kde.kstars.indi] - INDI Server:  "2024-08-15T23:14:21: Driver indi_asi_ccd: snooping on Celestron Advanced VX Wired.TELESCOPE_PIER_SIDE"
[2024-08-15T16:14:21.742 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[DEBUG] Toggle Debug Level -- Serial "
[2024-08-15T16:14:21.952 PDT INFO ][           org.kde.kstars.ekos] - Connecting to "Celestron Advanced VX Wired"
[2024-08-15T16:14:22.061 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[DEBUG] Connecting to /dev/ttyUSB0 @ 9600 "
[2024-08-15T16:14:22.381 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[DEBUG] Port FD 3 "
[2024-08-15T16:14:22.381 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[DEBUG] Connection successful, attempting handshake... "
[2024-08-15T16:14:22.381 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[DEBUG] CAUX: connect 3 (serial) "
[2024-08-15T16:14:22.531 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[INFO] Setting serial speed to 9600 baud. "
[2024-08-15T16:14:22.542 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[CSER] CMD <56> "
[2024-08-15T16:14:22.542 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[CSER] aux_tty_read: 3 "
[2024-08-15T16:14:22.563 PDT DEBG ][           org.kde.kstars.ekos] - Connecting  "Celestron Advanced VX Wired"
[2024-08-15T16:14:23.232 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[ERROR] Timeout error "
[2024-08-15T16:14:23.232 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[INFO] Detected Mount USB serial connection. "
[2024-08-15T16:14:23.232 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[DEBUG] Communicating with mount motor controllers... "
[2024-08-15T16:14:23.232 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[CAUX] CMD <     GET_VER>  APP ->  AZM "
[2024-08-15T16:14:23.384 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[CSER] CMD <3B 03 20 10 FE CF> "
[2024-08-15T16:14:23.385 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[CSER] aux_tty_read: 3 "
[2024-08-15T16:14:24.257 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[ERROR] Timeout error "
[2024-08-15T16:14:24.258 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[ERROR] Got no response from target ALT or AZM. "
[2024-08-15T16:14:24.258 PDT INFO ][           org.kde.kstars.indi] - Celestron Advanced VX Wired :  "[ERROR] Cannot continue without connection to motor controllers. "
[2024-08-15T16:14:24.258 PDT DEBG ][           org.kde.kstars.indi] - Celestron Advanced VX Wired : "[DEBUG] Handshake failed. "
[2024-08-15T16:14:31.393 PDT INFO ][           org.kde.kstars.ekos] - "Failed to connect to Celestron Advanced VX Wired. Please ensure device is connected and powered on."