Very weird failure about fastboot

This failure often occurs when I use fastboot to boot TWRP.

fastboot boot ~/twrp-3.5.2_9-0-nash.img
Sending 'boot.img' (36576 KB)

There was no response at all.

At this time, I can only unplug the usb cable and reconnect it, so it seems that fastboot can work again.


fastboot boot ~/twrp-3.5.2_9-0-nash.img
Sending 'boot.img' (36576 KB)                      OKAY [  0.129s]
Booting                                            OKAY [  5.120s]
Finished. Total time: 5.269s

There seems to be nothing interesting in the kernel log.

[  189.469537] audit: type=1101 audit(1637924966.123:230): pid=4258 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:accounting grantors=pam_unix,pam_permit,pam_time acct="test" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  189.469665] audit: type=1110 audit(1637924966.123:231): pid=4258 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  189.469977] audit: type=1105 audit(1637924966.123:232): pid=4258 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_open grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  189.494875] audit: type=1106 audit(1637924966.149:233): pid=4258 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_close grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  189.494914] audit: type=1104 audit(1637924966.149:234): pid=4258 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  197.294693] audit: type=1101 audit(1637924973.946:235): pid=4276 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:accounting grantors=pam_unix,pam_permit,pam_time acct="test" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  197.294814] audit: type=1110 audit(1637924973.946:236): pid=4276 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  197.295201] audit: type=1105 audit(1637924973.946:237): pid=4276 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_open grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  197.323491] audit: type=1106 audit(1637924973.973:238): pid=4276 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_close grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  197.323531] audit: type=1104 audit(1637924973.973:239): pid=4276 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  204.482252] audit: type=1101 audit(1637924981.133:240): pid=4290 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:accounting grantors=pam_unix,pam_permit,pam_time acct="test" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  204.482401] audit: type=1110 audit(1637924981.133:241): pid=4290 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  204.482848] audit: type=1105 audit(1637924981.133:242): pid=4290 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_open grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  213.736903] audit: type=1101 audit(1637924990.387:243): pid=4301 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:accounting grantors=pam_unix,pam_permit,pam_time acct="test" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/1 res=success'
[  213.736997] audit: type=1110 audit(1637924990.390:244): pid=4301 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/1 res=success'
[  213.737297] audit: type=1105 audit(1637924990.390:245): pid=4301 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_open grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/1 res=success'
[  213.757396] audit: type=1106 audit(1637924990.410:246): pid=4301 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_close grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/1 res=success'
[  213.757436] audit: type=1104 audit(1637924990.410:247): pid=4301 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/1 res=success'
[  214.696694] audit: type=1101 audit(1637924991.347:248): pid=4315 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:accounting grantors=pam_unix,pam_permit,pam_time acct="test" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/1 res=success'
[  214.696880] audit: type=1110 audit(1637924991.347:249): pid=4315 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/1 res=success'
[  214.697517] audit: type=1105 audit(1637924991.350:250): pid=4315 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_open grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/1 res=success'
[  214.724969] audit: type=1106 audit(1637924991.377:251): pid=4315 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_close grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/1 res=success'
[  214.725010] audit: type=1104 audit(1637924991.377:252): pid=4315 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/1 res=success'
[  368.837304] INFO: task fastboot:4291 blocked for more than 122 seconds.
[  368.837310]       Tainted: G           OE     5.15.5-1-MANJARO #1
[  368.837312] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  368.837313] task:fastboot        state:D stack:    0 pid: 4291 ppid:  4290 flags:0x00000000
[  368.837318] Call Trace:
[  368.837320]  <TASK>
[  368.837322]  __schedule+0x331/0x1540
[  368.837329]  ? xhci_urb_enqueue+0x1e1/0x520
[  368.837334]  schedule+0x5d/0xd0
[  368.837337]  schedule_timeout+0x125/0x160
[  368.837341]  wait_for_completion_timeout+0x9e/0x120
[  368.837344]  usb_start_wait_urb+0xa8/0x190
[  368.837347]  do_proc_bulk+0x14b/0x2f0
[  368.837351]  usbdev_ioctl+0x2c6/0x1370
[  368.837354]  ? exit_to_user_mode_prepare+0x8d/0x180
[  368.837358]  __x64_sys_ioctl+0x8e/0xd0
[  368.837361]  do_syscall_64+0x5c/0x90
[  368.837364]  ? do_syscall_64+0x69/0x90
[  368.837366]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[  368.837370] RIP: 0033:0x7fcbb89dc59b
[  368.837373] RSP: 002b:00007ffd234c9718 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  368.837376] RAX: ffffffffffffffda RBX: 00007ffd234c9740 RCX: 00007fcbb89dc59b
[  368.837378] RDX: 00007ffd234c9750 RSI: 00000000c0185502 RDI: 0000000000000004
[  368.837379] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
[  368.837381] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd234c9750
[  368.837382] R13: 00000000c0185502 R14: 000055769a0c1eb0 R15: 0000000000000100
[  368.837386]  </TASK>
[  491.720247] INFO: task fastboot:4291 blocked for more than 245 seconds.
[  491.720253]       Tainted: G           OE     5.15.5-1-MANJARO #1
[  491.720255] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  491.720257] task:fastboot        state:D stack:    0 pid: 4291 ppid:  4290 flags:0x00000000
[  491.720262] Call Trace:
[  491.720263]  <TASK>
[  491.720266]  __schedule+0x331/0x1540
[  491.720273]  ? xhci_urb_enqueue+0x1e1/0x520
[  491.720278]  schedule+0x5d/0xd0
[  491.720281]  schedule_timeout+0x125/0x160
[  491.720284]  wait_for_completion_timeout+0x9e/0x120
[  491.720288]  usb_start_wait_urb+0xa8/0x190
[  491.720292]  do_proc_bulk+0x14b/0x2f0
[  491.720295]  usbdev_ioctl+0x2c6/0x1370
[  491.720298]  ? exit_to_user_mode_prepare+0x8d/0x180
[  491.720302]  __x64_sys_ioctl+0x8e/0xd0
[  491.720306]  do_syscall_64+0x5c/0x90
[  491.720308]  ? do_syscall_64+0x69/0x90
[  491.720311]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[  491.720315] RIP: 0033:0x7fcbb89dc59b
[  491.720318] RSP: 002b:00007ffd234c9718 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  491.720321] RAX: ffffffffffffffda RBX: 00007ffd234c9740 RCX: 00007fcbb89dc59b
[  491.720323] RDX: 00007ffd234c9750 RSI: 00000000c0185502 RDI: 0000000000000004
[  491.720325] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
[  491.720327] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd234c9750
[  491.720328] R13: 00000000c0185502 R14: 000055769a0c1eb0 R15: 0000000000000100
[  491.720332]  </TASK>
[  512.700187] usb 4-3: USB disconnect, device number 8
[  512.903831] kauditd_printk_skb: 5 callbacks suppressed
[  512.903835] audit: type=1106 audit(1637925289.560:258): pid=4290 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_close grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  512.903897] audit: type=1104 audit(1637925289.560:259): pid=4290 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  515.680241] usb 4-3: new SuperSpeed USB device number 9 using xhci_hcd
[  515.697873] usb 4-3: New USB device found, idVendor=22b8, idProduct=2e80, bcdDevice= 1.00
[  515.697878] usb 4-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  515.697880] usb 4-3: Product: Fastboot nash S
[  515.697882] usb 4-3: Manufacturer: Motorola Mobility LLC.
[  515.697884] usb 4-3: SerialNumber: ZY224HLGQ4
[  520.261397] audit: type=1100 audit(1637925296.917:260): pid=5314 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:authentication grantors=pam_faillock,pam_permit,pam_faillock acct="test" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  520.262277] audit: type=1101 audit(1637925296.917:261): pid=5314 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:accounting grantors=pam_unix,pam_permit,pam_time acct="test" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  520.262452] audit: type=1110 audit(1637925296.917:262): pid=5314 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  520.263055] audit: type=1105 audit(1637925296.917:263): pid=5314 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_open grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  527.467143] usb 4-3: USB disconnect, device number 9
[  527.670826] audit: type=1106 audit(1637925304.326:264): pid=5314 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_close grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  527.670864] audit: type=1104 audit(1637925304.326:265): pid=5314 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  530.090620] usb 4-3: new SuperSpeed USB device number 10 using xhci_hcd
[  530.109031] usb 4-3: New USB device found, idVendor=22b8, idProduct=2e80, bcdDevice= 1.00
[  530.109036] usb 4-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  530.109037] usb 4-3: Product: Fastboot nash S
[  530.109039] usb 4-3: Manufacturer: Motorola Mobility LLC.
[  530.109040] usb 4-3: SerialNumber: ZY224HLGQ4
[  545.458112] usb 4-3: USB disconnect, device number 10
[  552.348249] usb 6-1.4: new SuperSpeed USB device number 5 using xhci_hcd
[  552.365829] usb 6-1.4: New USB device found, idVendor=22b8, idProduct=2e80, bcdDevice= 1.00
[  552.365836] usb 6-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  552.365838] usb 6-1.4: Product: Fastboot nash S
[  552.365840] usb 6-1.4: Manufacturer: Motorola Mobility LLC.
[  552.365842] usb 6-1.4: SerialNumber: ZY224HLGQ4
[  562.532344] usb 6-1.4: USB disconnect, device number 5
[  566.753901] audit: type=1101 audit(1637925343.409:266): pid=5425 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:accounting grantors=pam_unix,pam_permit,pam_time acct="test" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  566.754076] audit: type=1110 audit(1637925343.409:267): pid=5425 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  566.754669] audit: type=1105 audit(1637925343.412:268): pid=5425 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_open grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  566.769058] audit: type=1106 audit(1637925343.426:269): pid=5425 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_close grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  566.769099] audit: type=1104 audit(1637925343.426:270): pid=5425 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  571.722521] usb 6-1.4: new SuperSpeed USB device number 6 using xhci_hcd
[  571.741119] usb 6-1.4: New USB device found, idVendor=18d1, idProduct=4ee7, bcdDevice= 4.04
[  571.741126] usb 6-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  571.741129] usb 6-1.4: Product: Moto Z (2)
[  571.741130] usb 6-1.4: Manufacturer: Motorola
[  571.741132] usb 6-1.4: SerialNumber: ZY224HLGQ4
[  578.922702] usb 6-1.4: reset SuperSpeed USB device number 6 using xhci_hcd
[  578.939416] usb 6-1.4: device firmware changed
[  578.939973] usb 6-1.4: USB disconnect, device number 6
[  579.251769] usb 6-1.4: new SuperSpeed USB device number 7 using xhci_hcd
[  579.270970] usb 6-1.4: New USB device found, idVendor=22b8, idProduct=ff48, bcdDevice= 4.04
[  579.270977] usb 6-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  579.270979] usb 6-1.4: Product: Moto Z (2)
[  579.270981] usb 6-1.4: Manufacturer: Motorola
[  579.270982] usb 6-1.4: SerialNumber: ZY224HLGQ4
[  587.922892] usb 6-1.4: USB disconnect, device number 7
[  591.878387] usb 6-1.4: new SuperSpeed USB device number 8 using xhci_hcd
[  591.895972] usb 6-1.4: New USB device found, idVendor=22b8, idProduct=2e80, bcdDevice= 1.00
[  591.895978] usb 6-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  591.895980] usb 6-1.4: Product: Fastboot nash S
[  591.895982] usb 6-1.4: Manufacturer: Motorola Mobility LLC.
[  591.895983] usb 6-1.4: SerialNumber: ZY224HLGQ4
[  609.868202] usb 6-1.4: USB disconnect, device number 8
[  612.428743] usb 6-1.4: new SuperSpeed USB device number 9 using xhci_hcd
[  612.446406] usb 6-1.4: New USB device found, idVendor=22b8, idProduct=2e80, bcdDevice= 1.00
[  612.446411] usb 6-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  612.446413] usb 6-1.4: Product: Fastboot nash S
[  612.446415] usb 6-1.4: Manufacturer: Motorola Mobility LLC.
[  612.446417] usb 6-1.4: SerialNumber: ZY224HLGQ4
[  622.056817] usb 6-1.4: USB disconnect, device number 9
[  631.275766] usb 6-1.4: new SuperSpeed USB device number 10 using xhci_hcd
[  631.293850] usb 6-1.4: New USB device found, idVendor=18d1, idProduct=4ee7, bcdDevice= 4.04
[  631.293855] usb 6-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  631.293857] usb 6-1.4: Product: Moto Z (2)
[  631.293859] usb 6-1.4: Manufacturer: Motorola
[  631.293861] usb 6-1.4: SerialNumber: ZY224HLGQ4
[  638.592518] usb 6-1.4: reset SuperSpeed USB device number 10 using xhci_hcd
[  638.609667] usb 6-1.4: device firmware changed
[  638.609963] usb 6-1.4: USB disconnect, device number 10
[  638.922497] usb 6-1.4: new SuperSpeed USB device number 11 using xhci_hcd
[  638.940441] usb 6-1.4: New USB device found, idVendor=22b8, idProduct=ff48, bcdDevice= 4.04
[  638.940445] usb 6-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  638.940447] usb 6-1.4: Product: Moto Z (2)
[  638.940449] usb 6-1.4: Manufacturer: Motorola
[  638.940450] usb 6-1.4: SerialNumber: ZY224HLGQ4
[  790.056001] audit: type=1101 audit(1637925566.706:271): pid=5781 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:accounting grantors=pam_unix,pam_permit,pam_time acct="test" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  790.056210] audit: type=1110 audit(1637925566.706:272): pid=5781 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[  790.056900] audit: type=1105 audit(1637925566.706:273): pid=5781 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_open grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'

android-udev is of no use to me.

It appears fastboot is working fine. The issue may be with your phone or TWRP.

I would post on XDA for help as this is not an Android support forum.

In fact, I did not encounter this failure on Windows.

It’s a dependency of android-tools which contains fastboot. Is that what you have installed or did you obtain the fastboot binary elsewhere?

You can also download The Android SDK Platform Tools directly from Google and run them anywhere:

I installed android-tools from the software source.
And I tested the binary file of SDK Platform Tools downloaded from the official website of google, and both fastboot have the same failure.

The same problem. fastboot devices works and shows a device, but no other “fastboot”. Almost “clean” Manjaro stable install.
Windows on the same pc, same cable and same phone works fine.
What’s more interesting that at first it worked ok on linux, but suddenly just stopped. Total mystery.

   /data/nokia/magisk  /data/nokia/magisk/fastboot boot magisk_patched-23000_oQ8tr.img  1 ✘  1m 35s 
Sending ‘boot.img’ (65536 KB)

some fastboot commands just don’t work, while it definitely works on the same machine (device, cable) on win.

   /data/nokia/magisk  fastboot set_active b  1 ✘

Setting current slot to ‘b’ FAILED (remote: ‘Invalid Slot’)
fastboot: error: Command failed

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