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+--- Thread: [SOLVED] Can't boot when SD card inserted (/showthread.php?tid=6819)
[SOLVED] Can't boot when SD card inserted - jschall - 11-16-2018
I used a 64GB microSD card to install Q4OS to the EMMC card.
I was able to boot to Q4OS from the SD card when the original KDE Neon was on the EMMC.
Now, I normally boot from EMMC to Q4OS.
So, I re-formatted the microSD card, in order to use it for extra storage.
It works OK, I can mount the card and read/write files on it.
BUT -
If I reboot with the card inserted, my Pinebook will not boot. Black screen, no error message.
I have to remove the card and hard-reboot, then re-insert the card.
There is something on the card that makes the Pinebook try to boot from it, but there's no boot partition on the card:
adminq@pinebook1080p:~$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/root 15G 5.7G 8.1G 42% /
devtmpfs 798M 0 798M 0% /dev
tmpfs 995M 17M 979M 2% /dev/shm
tmpfs 995M 8.7M 987M 1% /run
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 995M 0 995M 0% /sys/fs/cgroup
/dev/mmcblk0p1 100M 23M 77M 23% /boot
tmpfs 199M 12K 199M 1% /run/user/1000
adminq@pinebook1080p:~$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
mmcblk0 179:0 0 14.6G 0 disk
├─mmcblk0p1 179:1 0 100M 0 part /boot
└─mmcblk0p2 179:2 0 14.5G 0 part /
mmcblk0boot0 179:8 0 4M 1 disk
mmcblk0boot1 179:16 0 4M 1 disk
mmcblk1 179:24 0 60G 0 disk
└─mmcblk1p1 179:25 0 60G 0 part
adminq@pinebook1080p:~$
If I insert a different microSD card, from my Android tablet, there is no such problem.
What do I have to remove or add to the 64GB card so that Pinebook doesn't try to boot from it?
Further to this problem.
I used the Pinebook Installer to write ARCH Linux image onto the 64GB card.
It still won't boot, and now it won't mount, either.
Does this dmesg|tail output suggest what is wrong with the card?
adminq@pinebook1080p:~$ dmesg|tail
[ 195.062891] sunxi-mmc 1c0f000.sdmmc: sdc set ios: clk 400000Hz bm PP pm ON vdd 16 width 1 timing LEGACY(SDR12) dt B
[ 195.098407] mmc2: host does not support reading read-only switch. assuming write-enable.
[ 195.107276] sunxi-mmc 1c0f000.sdmmc: sdc set ios: clk 25000000Hz bm PP pm ON vdd 16 width 1 timing LEGACY(SDR12) dt B
[ 195.119012] sunxi-mmc 1c0f000.sdmmc: sdc set ios: clk 25000000Hz bm PP pm ON vdd 16 width 4 timing LEGACY(SDR12) dt B
[ 195.130659] mmc2: new SDXC card at address 0001
[ 195.137285] mmcblk1: mmc2:0001 SD16G 60.0 GiB
[ 195.145172] mmcblk1: p1 p2 p3
[ 227.609344] systemd[1]: local-fs.target: Cannot add dependency job, ignoring: Unit -.mount is masked.
[ 274.112550] JBD2: Unrecognised features on journal
[ 274.125997] EXT4-fs (mmcblk1p3): error loading journal
adminq@pinebook1080p:~$
RE: Can't boot when SD card inserted - cvmiller - 11-16-2018
Perhaps you have already tried this, but if you remove the SD card, will it boot off of the eMMC?
It appears that the Pinebook has a boot order, of SD slot, then eMMC. Not sure if this can be changed (or if it is a good idea to change it)
RE: Can't boot when SD card inserted - jschall - 11-17-2018
Thank you for the reply. @cvmiller.
Yes, it boots from EMMC as long as that "poison" 64GB microSD card is not inserted.
And it boots when a different microSD card is inserted.
The problem is with that particular card, Pinebook "thinks" it should boot from it, but there's nothing there.
RE: Can't boot when SD card inserted - martinayotte - 11-17-2018
(11-17-2018, 07:18 AM)jschall Wrote: The problem is with that particular card, Pinebook "thinks" it should boot from it, but there's nothing there.
Even if you re-formatted the partition, this doesn't remove the u-boot sectors from SDCard ...
To get rid of u-boot, you need to erase few sectors with the following command :
Code:
dd if=/dev/zero of=/dev/mmcblk0 bs=1024 seek=8 count=2048RE: Can't boot when SD card inserted - jschall - 11-17-2018
Merci, @martinayotte, for your reply.
But I think that should be /dev/mmcblk1, because /dev/mmcblk0 is my EMMC!
RE: Can't boot when SD card inserted - jschall - 11-17-2018
@martinayotte, your dd suggestion worked!
Thank you.
Now I have a 64GB microSD card that I can leave inserted while rebooting from EMMC.
adminq@pinebook1080p:~$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
mmcblk0 179:0 0 14.6G 0 disk
├─mmcblk0p1 179:1 0 100M 0 part /boot
└─mmcblk0p2 179:2 0 14.5G 0 part /
mmcblk0boot0 179:8 0 4M 1 disk
mmcblk0boot1 179:16 0 4M 1 disk
mmcblk1 179:24 0 60G 0 disk
└─mmcblk1p1 179:25 0 60G 0 part
adminq@pinebook1080p:~$
@martinayotte, your dd suggestion worked!
Thank you.
Now I have a 64GB microSD card that I can leave inserted while rebooting from EMMC.
adminq@pinebook1080p:~$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
mmcblk0 179:0 0 14.6G 0 disk
├─mmcblk0p1 179:1 0 100M 0 part /boot
└─mmcblk0p2 179:2 0 14.5G 0 part /
mmcblk0boot0 179:8 0 4M 1 disk
mmcblk0boot1 179:16 0 4M 1 disk
mmcblk1 179:24 0 60G 0 disk
└─mmcblk1p1 179:25 0 60G 0 part
adminq@pinebook1080p:~$