[General Questions and Answers] iwanttoroota11walmart:
yes fastboot works if i go to the bootloader

slot a is what it was on so that changed nothing

and slot be dosent have liveboot show up (meaning that it probly cant load magisk in slot b) but it still hangs on "Phone is starting" after the bootanimation is over also here is the output of "Fastboot getvar all"

and neather slots let me do adb shell wile on the normal system

coppe ~ ~ took 10s
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│ ツ
└─────>λ𝅱͜ adb reboot bootloader

coppe ~ ~
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│ ツ
└─────>λ𝅱͜ fastboot getvar all
(bootloader) parallel-download-flash:yes
(bootloader) hw-revision:20001
(bootloader) unlocked:yes
(bootloader) off-mode-charge:1
(bootloader) charger-screen-enabled:1
(bootloader) battery-soc-ok:yes
(bootloader) battery-voltage:4319
(bootloader) version-baseband:
(bootloader) version-bootloader:
(bootloader) erase-block-size: 0x1000
(bootloader) logical-block-size: 0x1000
(bootloader) variant:SDM UFS
(bootloader) partition-type:fsc:raw
(bootloader) partition-size:fsc: 0x20000
(bootloader) partition-type:fsg:raw
(bootloader) partition-size:fsg: 0x200000
(bootloader) partition-type:modemst2:raw
(bootloader) partition-size:modemst2: 0x200000
(bootloader) partition-type:modemst1:raw
(bootloader) partition-size:modemst1: 0x200000
(bootloader) partition-type:ALIGN_TO_128K_2:raw
(bootloader) partition-size:ALIGN_TO_128K_2: 0x1A000
(bootloader) partition-type:ImageFv:raw
(bootloader) partition-size:ImageFv: 0x200000
(bootloader) partition-type:logdump:raw
(bootloader) partition-size:logdump: 0x4000000
(bootloader) partition-type:sti:raw
(bootloader) partition-size:sti: 0x200000
(bootloader) partition-type:logfs:raw
(bootloader) partition-size:logfs: 0x800000
(bootloader) partition-type:toolsfv:raw
(bootloader) partition-size:toolsfv: 0x100000
(bootloader) partition-type:limits:raw
(bootloader) partition-size:limits: 0x1000
(bootloader) partition-type:splash:raw
(bootloader) partition-size:splash: 0x20A4000
(bootloader) partition-type:spunvm:raw
(bootloader) partition-size:spunvm: 0x800000
(bootloader) partition-type:msadp:raw
(bootloader) partition-size:msadp: 0x40000
(bootloader) partition-type:apdp:raw
(bootloader) partition-size:apdp: 0x40000
(bootloader) partition-type:dip:raw
(bootloader) partition-size:dip: 0x100000
(bootloader) partition-type:devinfo:raw
(bootloader) partition-size:devinfo: 0x1000
(bootloader) partition-type:sec:raw
(bootloader) partition-size:sec: 0x4000
(bootloader) partition-type:op1:raw
(bootloader) partition-size:op1: 0x6400000
(bootloader) partition-type:boot_aging:raw
(bootloader) partition-size:boot_aging: 0x4000000
(bootloader) partition-type:minidump:raw
(bootloader) partition-size:minidump: 0x6400000
(bootloader) partition-type:fw_ufs8_b:raw
(bootloader) partition-size:fw_ufs8_b: 0x200000
(bootloader) partition-type:fw_ufs7_b:raw
(bootloader) partition-size:fw_ufs7_b: 0x200000
(bootloader) partition-type:fw_ufs6_b:raw
(bootloader) partition-size:fw_ufs6_b: 0x200000
(bootloader) partition-type:fw_ufs5_b:raw
(bootloader) partition-size:fw_ufs5_b: 0x200000
(bootloader) partition-type:fw_ufs4_b:raw
(bootloader) partition-size:fw_ufs4_b: 0x200000
(bootloader) partition-type:fw_ufs3_b:raw
(bootloader) partition-size:fw_ufs3_b: 0x200000
(bootloader) partition-type:fw_4u1ea_b:raw
(bootloader) partition-size:fw_4u1ea_b: 0x200000
(bootloader) partition-type:fw_4j1ed_b:raw
(bootloader) partition-size:fw_4j1ed_b: 0x200000
(bootloader) partition-type:LOGO_b:raw
(bootloader) partition-size:LOGO_b: 0x1000000
(bootloader) partition-type:storsec_b:raw
(bootloader) partition-size:storsec_b: 0x20000
(bootloader) partition-type:dtbo_b:raw
(bootloader) partition-size:dtbo_b: 0x800000
(bootloader) partition-type:vbmeta_b:raw
(bootloader) partition-size:vbmeta_b: 0x10000
(bootloader) partition-type:vendor_b:raw
(bootloader) partition-size:vendor_b: 0x40000000
(bootloader) partition-type:qupfw_b:raw
(bootloader) partition-size:qupfw_b: 0x10000
(bootloader) partition-type:devcfg_b:raw
(bootloader) partition-size:devcfg_b: 0x20000
(bootloader) partition-type:cmnlib64_b:raw
(bootloader) partition-size:cmnlib64_b: 0x80000
(bootloader) partition-type:cmnlib_b:raw
(bootloader) partition-size:cmnlib_b: 0x80000
(bootloader) partition-type:boot_b:raw
(bootloader) partition-size:boot_b: 0x4000000
(bootloader) partition-type:keymaster_b:raw
(bootloader) partition-size:keymaster_b: 0x80000
(bootloader) partition-type:dsp_b:raw
(bootloader) partition-size:dsp_b: 0x2000000
(bootloader) partition-type:abl_b:raw
(bootloader) partition-size:abl_b: 0x800000
(bootloader) partition-type:mdtp_b:raw
(bootloader) partition-size:mdtp_b: 0x2000000
(bootloader) partition-type:mdtpsecapp_b:raw
(bootloader) partition-size:mdtpsecapp_b: 0x400000
(bootloader) partition-type:bluetooth_b:raw
(bootloader) partition-size:bluetooth_b: 0x100000
(bootloader) partition-type:modem_b:raw
(bootloader) partition-size:modem_b: 0x7800000
(bootloader) partition-type:hyp_b:raw
(bootloader) partition-size:hyp_b: 0x80000
(bootloader) partition-type:tz_b:raw
(bootloader) partition-size:tz_b: 0x200000
(bootloader) partition-type:aop_b:raw
(bootloader) partition-size:aop_b: 0x80000
(bootloader) partition-type:fw_ufs8_a:raw
(bootloader) partition-size:fw_ufs8_a: 0x200000
(bootloader) partition-type:fw_ufs7_a:raw
(bootloader) partition-size:fw_ufs7_a: 0x200000
(bootloader) partition-type:fw_ufs6_a:raw
(bootloader) partition-size:fw_ufs6_a: 0x200000
(bootloader) partition-type:fw_ufs5_a:raw
(bootloader) partition-size:fw_ufs5_a: 0x200000
(bootloader) partition-type:fw_ufs4_a:raw
(bootloader) partition-size:fw_ufs4_a: 0x200000
(bootloader) partition-type:fw_ufs3_a:raw
(bootloader) partition-size:fw_ufs3_a: 0x200000
(bootloader) partition-type:fw_4u1ea_a:raw
(bootloader) partition-size:fw_4u1ea_a: 0x200000
(bootloader) partition-type:fw_4j1ed_a:raw
(bootloader) partition-size:fw_4j1ed_a: 0x200000
(bootloader) partition-type:LOGO_a:raw
(bootloader) partition-size:LOGO_a: 0x1000000
(bootloader) partition-type:storsec_a:raw
(bootloader) partition-size:storsec_a: 0x20000
(bootloader) partition-type:dtbo_a:raw
(bootloader) partition-size:dtbo_a: 0x800000
(bootloader) partition-type:vbmeta_a:raw
(bootloader) partition-size:vbmeta_a: 0x10000
(bootloader) partition-type:vendor_a:raw
(bootloader) partition-size:vendor_a: 0x40000000
(bootloader) partition-type:qupfw_a:raw
(bootloader) partition-size:qupfw_a: 0x10000
(bootloader) partition-type:devcfg_a:raw
(bootloader) partition-size:devcfg_a: 0x20000
(bootloader) partition-type:cmnlib64_a:raw
(bootloader) partition-size:cmnlib64_a: 0x80000
(bootloader) partition-type:cmnlib_a:raw
(bootloader) partition-size:cmnlib_a: 0x80000
(bootloader) partition-type:boot_a:raw
(bootloader) partition-size:boot_a: 0x4000000
(bootloader) partition-type:keymaster_a:raw
(bootloader) partition-size:keymaster_a: 0x80000
(bootloader) partition-type:dsp_a:raw
(bootloader) partition-size:dsp_a: 0x2000000
(bootloader) partition-type:abl_a:raw
(bootloader) partition-size:abl_a: 0x800000
(bootloader) partition-type:mdtp_a:raw
(bootloader) partition-size:mdtp_a: 0x2000000
(bootloader) partition-type:mdtpsecapp_a:raw
(bootloader) partition-size:mdtpsecapp_a: 0x400000
(bootloader) partition-type:bluetooth_a:raw
(bootloader) partition-size:bluetooth_a: 0x100000
(bootloader) partition-type:modem_a:raw
(bootloader) partition-size:modem_a: 0x7800000
(bootloader) partition-type:hyp_a:raw
(bootloader) partition-size:hyp_a: 0x80000
(bootloader) partition-type:tz_a:raw
(bootloader) partition-size:tz_a: 0x200000
(bootloader) partition-type:aop_a:raw
(bootloader) partition-size:aop_a: 0x80000
(bootloader) partition-type:ddr:raw
(bootloader) partition-size:ddr: 0x100000
(bootloader) partition-type:cdt:raw
(bootloader) partition-size:cdt: 0x20000
(bootloader) partition-type:ALIGN_TO_128K_1:raw
(bootloader) partition-size:ALIGN_TO_128K_1: 0x1A000
(bootloader) partition-type:xbl_config_b:raw
(bootloader) partition-size:xbl_config_b: 0x20000
(bootloader) partition-type:xbl_b:raw
(bootloader) partition-size:xbl_b: 0x380000
(bootloader) partition-type:xbl_config_a:raw
(bootloader) partition-size:xbl_config_a: 0x20000
(bootloader) partition-type:xbl_a:raw
(bootloader) partition-size:xbl_a: 0x380000
(bootloader) partition-type:userdata:ext4
(bootloader) partition-size:userdata: 0x1B800BB000
(bootloader) partition-type:odm_b:raw
(bootloader) partition-size:odm_b: 0x6400000
(bootloader) partition-type:odm_a:raw
(bootloader) partition-size:odm_a: 0x6400000
(bootloader) partition-type:system_b:ext4
(bootloader) partition-size:system_b: 0xB2C00000
(bootloader) partition-type:system_a:ext4
(bootloader) partition-size:system_a: 0xB2C00000
(bootloader) partition-type:config:raw
(bootloader) partition-size:config: 0x80000
(bootloader) partition-type:reserve2:raw
(bootloader) partition-size:reserve2: 0xFD0000
(bootloader) partition-type:reserve1:raw
(bootloader) partition-size:reserve1: 0x7E8000
(bootloader) partition-type:oem_stanvbk:raw
(bootloader) partition-size:oem_stanvbk: 0xA00000
(bootloader) partition-type:oem_dycnvbk:raw
(bootloader) partition-size:oem_dycnvbk: 0xA00000
(bootloader) partition-type:op2:raw
(bootloader) partition-size:op2: 0x10000000
(bootloader) partition-type:frp:raw
(bootloader) partition-size:frp: 0x80000
(bootloader) partition-type:keystore:raw
(bootloader) partition-size:keystore: 0x80000
(bootloader) partition-type:param:raw
(bootloader) partition-size:param: 0x100000
(bootloader) partition-type:misc:raw
(bootloader) partition-size:misc: 0x100000
(bootloader) partition-type:persist:raw
(bootloader) partition-size:persist: 0x2000000
(bootloader) partition-type:ssd:raw
(bootloader) partition-size:ssd: 0x2000
(bootloader) has-slot:modem:yes
(bootloader) has-slot:system:yes
(bootloader) current-slot:a
(bootloader) has-slot:boot:yes
(bootloader) slot-retry-count:b:6
(bootloader) slot-unbootable:b:no
(bootloader) slot-successful:b:yes
(bootloader) slot-retry-count:a:6
(bootloader) slot-unbootable:a:no
(bootloader) slot-successful:a:yes
(bootloader) slot-count:2
(bootloader) secure:yes
(bootloader) serialno:f07fe99f
(bootloader) product:sdm845
(bootloader) max-download-size:805306368
(bootloader) kernel:uefi
all:
Finished. Total time: 0.012s

coppe ~ ~
┌──────────────•
│ ツ
└─────>λ𝅱͜ fastboot set_active a
Setting current slot to 'a' OKAY [ 0.006s]
Finished. Total time: 0.008s

coppe ~ ~
┌──────────────•
│ ツ
└─────>λ𝅱͜ fastboot reboot
Rebooting OKAY [ 0.000s]
Finished. Total time: 0.050s

coppe ~ ~
┌──────────────•
│ ツ
└─────>λ𝅱͜ fastboot set_active b
Setting current slot to 'b' OKAY [ 0.034s]
Finished. Total time: 0.036s

coppe ~ ~
┌──────────────•
│ ツ
└─────>λ𝅱͜ fastboot reboot
Rebooting OKAY [ 0.000s]
Finished. Total time: 0.050s

coppe ~ ~
┌──────────────•
│ ツ
└─────>λ𝅱͜ [code]