[Nexus 4 Q&A, Help & Troubleshooting] eris170:
Following the howto here. I flashed twrp-2.8.6.0-mako.img and then hilighted "Reboot" with the volume keys and selected "Recovery". TWRP booted, and there was a small text field that flashed by with some red text in it about "/cache" or something and then the phone rebooted. It's stuck now in a TWRP boot loop. I was able to get into the device shell over ADB while TWRP was busy looping around and found this in dmesg. Um, where do I go from here? I have a hunch I can probably mkfs.ext4 /dev/mmcblk0p23 and then TWRP will boot but it's just a gues; is there an official fix for this? Is mmcblk0p23 really hosed from flashing TWRP or is this a TWRP bug? I've installed TWRP on a few different devices and never had this happen before. Thanks!

<6>[ 2.949000] android_work: android_work: sent uevent USB_STATE=CONFIGURED
<3>[ 3.009308] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<6>[ 3.040012] unplug_usbcheck_work: usb_vin : 4607444, max_voltage_mv=4360
<3>[ 3.089516] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 3.194109] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 3.270044] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 3.375156] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 3.459606] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<6>[ 3.562276] EXT4-fs (mmcblk0p22): mounted filesystem with ordered data mode. Opts:
<7>[ 3.562643] SELinux: initialized (dev mmcblk0p22, type ext4), uses xattr
<6>[ 3.594140] EXT4-fs (mmcblk0p21): mounted filesystem with ordered data mode. Opts:
<7>[ 3.594353] SELinux: initialized (dev mmcblk0p21, type ext4), uses xattr
<3>[ 3.704318] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 3.789684] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 3.884846] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 3.999938] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 4.103647] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 4.199725] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 4.304318] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 4.399664] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 4.998077] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 5.069708] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 5.667968] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 5.739722] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 6.346558] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 6.439554] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 7.028109] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 7.099710] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<6>[ 7.129040] msm_ta_detect_work: USB exit ta detection - frindex
<3>[ 7.707828] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 7.799694] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<6>[ 8.598992] mipi_lgit_lcd_off started
<6>[ 8.729040] mipi_lgit_lcd_off finished
<6>[ 8.729253] mipi_dsi_panel_power: mipi lcd function started status = 0
<6>[ 9.403784] mipi_dsi_panel_power: mipi lcd function started status = 1
<6>[ 9.405493] mipi_dsi_panel_power : reset start.
<6>[ 9.426644] mipi_lgit_lcd_on started
<6>[ 9.489211] mipi_lgit_lcd_on finished
<3>[ 9.796978] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 9.879536] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 9.961513] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 10.059697] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 10.155226] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 10.239707] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<6>[ 10.329375] EXT4-fs (mmcblk0p21): mounted filesystem with ordered data mode. Opts:
<7>[ 10.329620] SELinux: initialized (dev mmcblk0p21, type ext4), uses xattr
<3>[ 10.444407] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 10.519670] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 10.624752] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 10.699679] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 10.812604] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 10.889760] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 10.984465] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 11.069647] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 11.667907] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 11.739752] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 12.338074] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 12.429360] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 13.037906] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 13.139600] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 13.744819] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 13.819655] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 14.438242] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<3>[ 14.529681] EXT4-fs (mmcblk0p23): VFS: Can't find ext4 filesystem
<6>[ 15.298977] mipi_lgit_lcd_off started
<6>[ 15.429055] mipi_lgit_lcd_off finished
<6>[ 15.429238] mipi_dsi_panel_power: mipi lcd function started status = 0
<6>[ 16.103982] mipi_dsi_panel_power: mipi lcd function started status = 1
<6>[ 16.105692] mipi_dsi_panel_power : reset start.
<6>[ 16.126842] mipi_lgit_lcd_on started
<6>[ 16.199114] mipi_lgit_lcd_on finished
<4>[ 16.457347] adbd (162): /proc/162/oom_adj is deprecated, please use /proc/162/oom_score_adj instead.