Okay so, followed the latest forum guide here, respectively the official FP guide i.e. including fastboot flashing unlock_critical to flash CalyxOS.
From/old ROM: Stock FP4 ROM (OTA-updated to the one with patch level July or so, should be FP4.FP40.A.142.20220628).
To/new ROM: CalyxOS 3.9.0, i.e. SQ3A.220705.003.A1.22309000
using fastboot v33.0.3-8952118.
Given that these are quite recent versions, but it is a version upgrade (i.e. not using the version released some minutes ago for which CalyxOS has no version yet.), I felt quite safe.
So the log while flashing also looked successful:
Flash log
Sending 'abl_a' (148 KB) OKAY [ 0.006s]
Writing 'abl_a' OKAY [ 0.034s]
Finished. Total time: 0.048s
Sending 'abl_b' (148 KB) OKAY [ 0.006s]
Writing 'abl_b' OKAY [ 0.003s]
Finished. Total time: 0.015s
Sending 'aop_a' (176 KB) OKAY [ 0.008s]
Writing 'aop_a' OKAY [ 0.002s]
Finished. Total time: 0.018s
Sending 'aop_b' (176 KB) OKAY [ 0.008s]
Writing 'aop_b' OKAY [ 0.003s]
Finished. Total time: 0.017s
Sending 'bluetooth_a' (940 KB) OKAY [ 0.036s]
Writing 'bluetooth_a' OKAY [ 0.004s]
Finished. Total time: 0.049s
Sending 'bluetooth_b' (940 KB) OKAY [ 0.026s]
Writing 'bluetooth_b' OKAY [ 0.004s]
Finished. Total time: 0.037s
Sending 'core_nhlos_a' (108492 KB) OKAY [ 2.876s]
Writing 'core_nhlos_a' OKAY [ 0.287s]
Finished. Total time: 3.172s
Sending 'core_nhlos_b' (108492 KB) OKAY [ 3.132s]
Writing 'core_nhlos_b' OKAY [ 0.258s]
Finished. Total time: 3.398s
Sending 'devcfg_a' (44 KB) OKAY [ 0.009s]
Writing 'devcfg_a' OKAY [ 0.001s]
Finished. Total time: 0.018s
Sending 'devcfg_b' (44 KB) OKAY [ 0.008s]
Writing 'devcfg_b' OKAY [ 0.001s]
Finished. Total time: 0.016s
Sending 'dsp_a' (65536 KB) OKAY [ 1.719s]
Writing 'dsp_a' OKAY [ 0.142s]
Finished. Total time: 1.869s
Sending 'dsp_b' (65536 KB) OKAY [ 2.280s]
Writing 'dsp_b' OKAY [ 0.149s]
Finished. Total time: 2.436s
Sending 'featenabler_a' (88 KB) OKAY [ 0.013s]
Writing 'featenabler_a' OKAY [ 0.002s]
Finished. Total time: 0.023s
Sending 'featenabler_b' (88 KB) OKAY [ 0.007s]
Writing 'featenabler_b' OKAY [ 0.003s]
Finished. Total time: 0.017s
Sending 'hyp_a' (396 KB) OKAY [ 0.017s]
Writing 'hyp_a' OKAY [ 0.003s]
Finished. Total time: 0.028s
Sending 'hyp_b' (396 KB) OKAY [ 0.017s]
Writing 'hyp_b' OKAY [ 0.003s]
Finished. Total time: 0.027s
Sending 'imagefv_a' (524 KB) OKAY [ 0.026s]
Writing 'imagefv_a' OKAY [ 0.003s]
Finished. Total time: 0.037s
Sending 'imagefv_b' (524 KB) OKAY [ 0.027s]
Writing 'imagefv_b' OKAY [ 0.003s]
Finished. Total time: 0.037s
Sending 'keymaster_a' (240 KB) OKAY [ 0.016s]
Writing 'keymaster_a' OKAY [ 0.003s]
Finished. Total time: 0.027s
Sending 'keymaster_b' (240 KB) OKAY [ 0.007s]
Writing 'keymaster_b' OKAY [ 0.003s]
Finished. Total time: 0.017s
Sending 'modem_a' (146332 KB) OKAY [ 3.878s]
Writing 'modem_a' OKAY [ 0.346s]
Finished. Total time: 4.231s
Sending 'modem_b' (146332 KB) OKAY [ 3.929s]
Writing 'modem_b' OKAY [ 0.343s]
Finished. Total time: 4.279s
Sending 'multiimgoem_a' (16 KB) OKAY [ 0.009s]
Writing 'multiimgoem_a' OKAY [ 0.001s]
Finished. Total time: 0.018s
Sending 'multiimgoem_b' (16 KB) OKAY [ 0.009s]
Writing 'multiimgoem_b' OKAY [ 0.001s]
Finished. Total time: 0.017s
Sending 'qupfw_a' (56 KB) OKAY [ 0.009s]
Writing 'qupfw_a' OKAY [ 0.001s]
Finished. Total time: 0.017s
Sending 'qupfw_b' (56 KB) OKAY [ 0.011s]
Writing 'qupfw_b' OKAY [ 0.001s]
Finished. Total time: 0.028s
Sending 'tz_a' (2944 KB) OKAY [ 0.109s]
Writing 'tz_a' OKAY [ 0.008s]
Finished. Total time: 0.124s
Sending 'tz_b' (2944 KB) OKAY [ 0.112s]
Writing 'tz_b' OKAY [ 0.008s]
Finished. Total time: 0.127s
Sending 'uefisecapp_a' (124 KB) OKAY [ 0.010s]
Writing 'uefisecapp_a' OKAY [ 0.002s]
Finished. Total time: 0.021s
Sending 'uefisecapp_b' (124 KB) OKAY [ 0.007s]
Writing 'uefisecapp_b' OKAY [ 0.002s]
Finished. Total time: 0.017s
Sending 'xbl_a' (3300 KB) OKAY [ 0.098s]
Writing 'xbl_a' OKAY [ 0.011s]
Finished. Total time: 0.116s
Sending 'xbl_b' (3300 KB) OKAY [ 0.109s]
Writing 'xbl_b' OKAY [ 0.008s]
Finished. Total time: 0.124s
Sending 'xbl_config_a' (96 KB) OKAY [ 0.011s]
Writing 'xbl_config_a' OKAY [ 0.002s]
Finished. Total time: 0.021s
Sending 'xbl_config_b' (96 KB) OKAY [ 0.010s]
Writing 'xbl_config_b' OKAY [ 0.002s]
Finished. Total time: 0.028s
Sending 'frp' (512 KB) OKAY [ 0.017s]
Writing 'frp' OKAY [ 0.003s]
Finished. Total time: 0.028s
Sending 'devinfo' (4 KB) OKAY [ 0.007s]
Writing 'devinfo' OKAY [ 0.001s]
Finished. Total time: 0.015s
Erasing 'misc' OKAY [ 0.012s]
Finished. Total time: 0.017s
Erasing 'modemst1' OKAY [ 0.014s]
Finished. Total time: 0.018s
Erasing 'modemst2' OKAY [ 0.013s]
Finished. Total time: 0.017s
Setting current slot to 'a' OKAY [ 0.026s]
Finished. Total time: 0.028s
Rebooting into bootloader OKAY [ 0.001s]
Finished. Total time: 0.201s
< waiting for any device >
Erasing 'avb_custom_key' OKAY [ 0.014s]
Finished. Total time: 0.020s
Sending 'avb_custom_key' (1 KB) OKAY [ 0.008s]
Writing 'avb_custom_key' OKAY [ 0.011s]
Finished. Total time: 0.028s
--------------------------------------------
Bootloader Version...:
Baseband Version.....:
Serial Number........: eb077c0a
--------------------------------------------
extracting android-info.txt (0 MB) to RAM...
Checking 'product' OKAY [ 0.002s]
Setting current slot to 'a' OKAY [ 0.003s]
extracting boot.img (96 MB) to disk... took 0.291s
archive does not contain 'boot.sig'
Sending 'boot_a' (98304 KB) OKAY [ 2.601s]
Writing 'boot_a' OKAY [ 0.264s]
archive does not contain 'init_boot.img'
extracting dtbo.img (24 MB) to disk... took 0.088s
archive does not contain 'dtbo.sig'
Sending 'dtbo' (24576 KB) OKAY [ 0.638s]
Writing 'dtbo' OKAY [ 0.062s]
archive does not contain 'dt.img'
archive does not contain 'pvmfw.img'
extracting recovery.img (96 MB) to disk... took 0.293s
archive does not contain 'recovery.sig'
Sending 'recovery' (98304 KB) OKAY [ 2.582s]
Writing 'recovery' OKAY [ 0.233s]
extracting vbmeta.img (0 MB) to disk... took 0.000s
archive does not contain 'vbmeta.sig'
Sending 'vbmeta' (8 KB) OKAY [ 0.008s]
Writing 'vbmeta' OKAY [ 0.003s]
extracting vbmeta_system.img (0 MB) to disk... took 0.000s
archive does not contain 'vbmeta_system.sig'
Sending 'vbmeta_system' (4 KB) OKAY [ 0.002s]
Writing 'vbmeta_system' OKAY [ 0.003s]
archive does not contain 'vbmeta_vendor.img'
archive does not contain 'vendor_boot.img'
archive does not contain 'vendor_kernel_boot.img'
extracting super_empty.img (0 MB) to disk... took 0.000s
Rebooting into fastboot OKAY [ 0.001s]
< waiting for any device >
Sending 'super' (4 KB) OKAY [ 0.001s]
Updating super partition OKAY [ 0.007s]
Resizing 'odm_a' OKAY [ 0.004s]
Resizing 'product_a' OKAY [ 0.004s]
Resizing 'system_a' OKAY [ 0.004s]
Resizing 'system_ext_a' OKAY [ 0.004s]
Resizing 'system_b' OKAY [ 0.004s]
Resizing 'vendor_a' OKAY [ 0.004s]
Resizing 'vendor_b' OKAY [ 0.004s]
archive does not contain 'boot_other.img'
extracting odm.img (1 MB) to disk... took 0.009s
archive does not contain 'odm.sig'
Resizing 'odm_a' OKAY [ 0.004s]
Sending 'odm_a' (1052 KB) OKAY [ 0.032s]
Writing 'odm_a' OKAY [ 0.051s]
archive does not contain 'odm_dlkm.img'
extracting product.img (1081 MB) to disk... took 3.173s
archive does not contain 'product.sig'
Resizing 'product_a' OKAY [ 0.004s]
Sending sparse 'product_a' 1/5 (262140 KB) OKAY [ 8.212s]
Writing 'product_a' OKAY [ 0.955s]
Sending sparse 'product_a' 2/5 (262140 KB) OKAY [ 8.135s]
Writing 'product_a' OKAY [ 1.045s]
Sending sparse 'product_a' 3/5 (262140 KB) OKAY [ 8.204s]
Writing 'product_a' OKAY [ 0.972s]
Sending sparse 'product_a' 4/5 (262140 KB) OKAY [ 8.424s]
Writing 'product_a' OKAY [ 0.936s]
Sending sparse 'product_a' 5/5 (58488 KB) OKAY [ 1.549s]
Writing 'product_a' OKAY [ 0.260s]
extracting system.img (853 MB) to disk... took 2.915s
archive does not contain 'system.sig'
Resizing 'system_a' OKAY [ 0.005s]
Sending sparse 'system_a' 1/4 (262140 KB) OKAY [ 8.148s]
Writing 'system_a' OKAY [ 0.945s]
Sending sparse 'system_a' 2/4 (262140 KB) OKAY [ 7.970s]
Writing 'system_a' OKAY [ 1.025s]
Sending sparse 'system_a' 3/4 (262140 KB) OKAY [ 8.351s]
Writing 'system_a' OKAY [ 0.913s]
Sending sparse 'system_a' 4/4 (87672 KB) OKAY [ 2.365s]
Writing 'system_a' OKAY [ 0.407s]
archive does not contain 'system_dlkm.img'
extracting system_ext.img (222 MB) to disk... took 0.703s
archive does not contain 'system_ext.sig'
Resizing 'system_ext_a' OKAY [ 0.004s]
Sending 'system_ext_a' (227956 KB) OKAY [ 6.225s]
Writing 'system_ext_a' OKAY [ 0.817s]
archive does not contain 'system_other.img'
extracting vendor.img (420 MB) to disk... took 1.397s
archive does not contain 'vendor.sig'
Resizing 'vendor_a' OKAY [ 0.004s]
Sending sparse 'vendor_a' 1/2 (262140 KB) OKAY [ 8.205s]
Writing 'vendor_a' OKAY [ 0.940s]
Sending sparse 'vendor_a' 2/2 (168668 KB) OKAY [ 5.369s]
Writing 'vendor_a' OKAY [ 0.611s]
archive does not contain 'vendor_dlkm.img'
archive does not contain 'vendor_other.img'
Finished. Total time: 125.886s
Rebooting into bootloader OKAY [ 0.001s]
Finished. Total time: 0.051s
Now the only issue is the “OEM unlock” thingy. As others reported it is indeed:
- greyed out, i.e. not toggable
- the toggle is at the left, i.e. at OFF state
- however, what no one reported so far, it says “Bootloader is already unlocked”.
Screenshot (German language):
Screenshot (English):
The last sentence is quite good and true. I just wondered whether that is good or bad now.
So I booted into recovery again and unfortunately, the magic variable there says nope 
:
$ fastboot flashing get_unlock_ability
(bootloader) get_unlock_ability: 0
OKAY [ 0.001s]
Finished. Total time: 0.001s
So of course, I did not lock the bootloader.
So what should I do now? Wait for a CalyxOS to fix this (if they can?), reflash CalyxOS? Revert to Stock ROM?