Difference between revisions of "Troubleshooting"

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=== My screen is red! ===
=== My screen is red! ===
There are some buggy framebuffer drivers (e.g. in LG Nexus 5) that report incorrect data. You can override it with:
There are some buggy framebuffer drivers (e.g. in LG Nexus 5) that report incorrect data. You can override it by launching weston with:
<pre>weston --pixman-type=2</pre>
<pre>weston --pixman-type=2</pre>
More information on [https://github.com/postmarketOS/pmbootstrap/issues/54 issue #54]
To make it persistent, you can set it in the [[Deviceinfo_reference#weston|deviceinfo]]:
More information on [https://github.com/postmarketOS/pmbootstrap/issues/54 issue #54] and [[Troubleshooting:display#My_screen_is_red.21]]
=== Errors with grsec-based kernel on the host system ===
=== Errors with grsec-based kernel on the host system ===

Revision as of 17:56, 3 April 2018


General information

  • Always look at the log file for a detailed error message: ~/.local/var/pmbootstrap/log.txt
  • Make sure, that you have the latest version. Your bug may already be fixed.
  • Please report the bugs you have found in the issues, so we can fix them.
  • Syslog is enabled, and will log to shared memory once the OS has booted. It can be read with the logread tool in BusyBox. The syslog is currently not preserved across reboots.

Specific troubleshooting pages

Uncategorized errors

ERROR: unsatisfiable constraints

Read on if you get an error like the following:

ERROR: unsatisfiable constraints:
satisfies: world[libstdc++]
breaks: g++-armhf-6.4.0-r5[gcc=6.4.0-r5]
satisfies: world[gcc]


Unsatisfiable constraints means, that Alpine's package manager can't resolve packages properly. Most likely this is because there's a library packaged in Alpine that just got updated and a postmarketOS package depends on it. We detect such breakage automatically (with our Travis CI job, which runs with each new pull request, so at least once a day). If you get this error, try the following:


1. Update the APKINDEX files, it might be that we already fixed this issue and built the new packages.

$ pmbootstrap update

2. If that does not help, try to pull from git to see if we already increased the version in master.

$ git pull

In case we did not increase it yet, you can increase the versions on your own. Please let the others know, that the update needs to be done, either in the issues or in the chat.

3.a) If the error looks just like the above, with libstdc++ and gcc-armhf involved, regenerate your gcc-armhf aport based on the latest gcc aport from Alpine:

$ pmbootstrap aportgen gcc-armhf

3.b) For all other soname bumps, use the following command to automatically increase the pkgrel:

$ pmbootstrap pkgrel_bump --auto

There's also a --dry parameter if you just want to see which packages would get a pkgrel bump.

upstream repo broken

If the packages are not related to postmarketOS packages at all, there might be a bug in the upstream repositories (this is very unlikely and only happened once). postmarketOS is based on Alpine Linux testing. Maybe they have triggered a rebuild and it failed, so now the package is not available. You could try to install the latest stable package, as a workaround (although that may introduce other bugs!). Here's an example.

pmbootstrap is broken! But it worked yesterday!

Sorry! Revert to the last commit, that was known to work (git checkout $commit) and report an issue, if there is not already one. Consult with others in the IRC/matrix channel to find out, which commit was the last one that worked.

musl-*/busybox-static-* fails to build with a 404 error

Run pmbootstrap aportgen musl-armhf musl-aarch64. The reason why this fails from time to time is, that we use Alpine's binary musl lib c package for armhf/aarch64 in the native chroot, to get the cross-compiler working. So the download URL inside the aports/cross/musl-*/APKBUILD file must be in sync with the upstream version. This pmbootstrap command safely gets the new version, uses apk to verify the signature of the package, generates the hash, and updates the APKBUILD file. To make sure, that pmbootstrap aportgen receives the latest musl version, delete your HTTP cache right before by executing this command: pmbootstrap zap -hc. Don't bother making a pull-request for this, as the fix is really trivial (see this commit). Just report it as issue, if it happens.

Permission denied: .../pmbootstrap/work/chroot_native/proc/1/cwd'

It looks like you have created your work folder as: pmbootstrap/work, where pmbootstrap is the folder with the checked out source code. That is not supported. Please run pmbootstrap shutdown, then delete that folder, then run pmbootstrap init again and choose another work folder (e.g. ~/.local/var/pmbootstrap).

After that it should work - if this still does not resolve it, please open up an issue in the GitHub tracker.

can't create /dev/null: Permission denied

Make sure that your working directory is mounted correctly. This can happen when working over NFS, or when you mounted the drive your working directory is on trough the file explorer (if that's the case, umount it, and mount it manually). This can probably happen on every drive mounted with nosuid or similar.

Figuring out booting problems

Add rc_logging=YES to /etc/rc.conf to have openrc log all its steps to /var/log/rc.log. If you managed to get the system to boot far enough to have telnet access, add the port 24 telnet listener and you can mount the root device to view said log.

SSH / udev / touch screen do not work

  • Make sure, that DEVTMPFS is enabled in your kernel config. Do not enable DEVTMPFS_MOUNT.

I can't access the framebuffer device

BusyBox does something different than the standard tool for the job, and this breaks building my package!

Example: unzip in BusyBox doesn't extract symlinks like the normal unzip implementation (#82).

Solution: Simply add unzip to the makedepends in the APKBUILD, and the "real" unzip will be used (or in that case, try to get the sources in another archive format, such as .tar.bz2, .tar.xz, .tar.gz).

Errors with ecryptfs

When your "work" folder is inside an ecryptfs mounted folder, /dev/random may not work inside the chroot and you may have other issues. Try to move your work folder to another location, you can use /tmp to test if this resolves the issue. You can change the location in pmbootstrap init. See also: #61. (This doesn't seem to be an issue with newer versions of ecryptfs anymore.)

Serial Console Debug Cable (early boot debugging)

For some devices it's possible to get early boot output using a debug cable that provides access to the UART. Unfortunately manufacturers don't use to publish the details and it is endusers who in some cases have figured it out:

  • Here's one such cable for Nexus 4 and another for Nexus 5.
  • This article goes a step further with Google Nexus devices.
  • Sony has published information about how to access the UART port on their Xperia series
  • The Replicant wiki has useful information on this as well.

On fastboot devices, you may have to enable UART debugging with fastboot oem uart-on.

By default, all output from the initramfs get redirected to /pmOS_init.log. If you want the output through the debug cable you need to add PMOS_NO_OUTPUT_REDIRECT to your kernel command line.

See Serial debugging.

Proprietary Blobs

Many devices require proprietary blobs for enabling certain peripherals (wifi/bluetooth/cellular/GPS). These repositories appear to contain blobs for a large percentage of devices out there.

Force reboot

On some phones, you can hold down the power button for ten seconds to force a reboot. If that does not work: On other phones, you have to hold the power button down for a full minute (or hold it together with volume down). On some phones, it might take even longer (3 minutes or so).

Phone shows the telnet message, a black screen, or doesn't leave the bootloader or Samsung/Google/... splash screen

See: Troubleshooting:boot

My device runs the Linux kernel (e.g. Android), but the vendor does not provide the source

  1. Ask kindly via e-mail.
  2. If they don't provide the source, team up with gpl-violations.org. You have the legal right to get the source, because the Linux kernel is under the GPLv2!
  3. Another option is using prebuilt kernels

I have ported postmarketOS to my device and the screen doesn't get updated

There is a known bug where if you execute cat /sys/class/graphics/fb0/modes > /sys/class/graphics/fb0/mode exactly one frame is drawn, and the screen isn't updated otherwise.

"if running weston from ssh, use --tty to specify a tty"

Specify a tty in weston's commandline. The correct syntax is: weston --tty=1.

Weston and fbsplash -s <image> do not work

If Weston returns an error because it could not access /dev/tty1, even when you specify it on the command line as above, you may need to enable Virtual Terminals in the kernel config.
You can enable CONFIG_VT using pmbootstrap menuconfig and checking under Device Drivers -> Character devices -> Virtual terminal

My screen is red!

There are some buggy framebuffer drivers (e.g. in LG Nexus 5) that report incorrect data. You can override it by launching weston with:

weston --pixman-type=2

To make it persistent, you can set it in the deviceinfo:


More information on issue #54 and Troubleshooting:display#My_screen_is_red.21

Errors with grsec-based kernel on the host system

See: Troubleshooting:grsec

WARNING: No provider for dependency...

Normal behavior. it means, that your "user" repository (the repository with all custom compiled packaged from pmOS, such as your device package and kernel) does not have the dependencies from the official Alpine Linux repositories (such as cryptsetup, iw, htop, ...) when indexing it. But these dependencies are in the official repositories, so they will be found when you try to install something. Usually the package indexing is done on all repositories at once in Alpine (then you wouldn't get the error), but pmOS does it only on the "user" repository.

ERROR: busybox-1.27.0-r1.post-install: script exited with error 127

Normal behavior. We use a x86_64 version of apk to set up the chroots. When setting up the armhf chroot, the armhf post-installation code can't be executed, and that's where the errors come from. But we run "apk fix" right afterwards - with the armhf architecture, because we have an armhf version of apk installed inside the chroot now - and this runs the installation scripts again.

sh: can't create /proc/sys/fs/binfmt_misc/register: nonexistent directory

This issue is known to happen in Alpine Virthardened. It also happened in Void Linux for one user. These commands should fix it:

sudo modprobe binfmt_misc
sudo mount -t binfmt_misc none /proc/sys/fs/binfmt_misc

If it still does not work, it is probably not supported by your host Linux distribution's kernel (CONFIG_BINFMT_MISC). Try to use another kernel.

ERROR: /mnt/pmbootstrap-packages/x86_64/qemu-user-static-repack-2.8-r6.apk: UNTRUSTED signature

You don't have your own package signing key imported, which gets generated when you compile a package for the first time. pmbootstrap should automatically import it, but when you hit ^C during that, it may go wrong.

Your generated key is in ~/.local/var/pmbootstrap/config_abuild, all imported keys are in ~/.local/var/pmbootstrap/config_apk_keys.

A quick fix is deleting all packages:

./pmbootstrap zap -p

See issue #270 for more information and don't hesitate to reopen if this didn't work for you.

Fastboot does not detect my device!

Maybe you need to install udev rules on your host Linux distribution. Arch has the android-udev package for example, which uses the rules from here.

If that does not help, it might be necessary to set the flash_fastboot_vendor_id in your deviceinfo (this was necessary for the Amazon Kindle Fire HDX). Try to search the web for your device name and "fastboot vendor id".

Invalid sparse file format at header magi

In some devices (e.g.: bullhead, titan), when flashing the system (pmbootstrap flasher flash_rootfs), it works but fastboot complains of Invalid sparse file format at header magi.

$ ./pmbootstrap.py flasher flash_rootfs
[23:02:58] (native) install android-tools
[23:02:58] (native) flash rootfs image
target reported max download size of 536870912 bytes
Invalid sparse file format at header magi
sending sparse 'system' 1/1 (274101 KB)...
OKAY [  9.452s]
writing 'system' 1/1...
OKAY [ 12.584s]
finished. total time: 22.036s
[23:03:20] Done

It happens when your device expects a sparse system image. The workaround is as follows:

  • Set deviceinfo_flash_sparse=true in deviceinfo
  • Add libsparse to depends=.

For more information, see issue #299

Installed version newer than the version in the repositories

You have a program installed in one of your chroots with a higher version, than what is available in the binary package repositories (either from upstream or the packages you have built yourself).

Example how this can happen:

  • Git branch switch to one which increased the version of postmarketos-mkinitfs
  • Build postmarketos-mkinitfs
  • Install it in a chroot (e.g. by running pmbootstrap install)
  • Branch switched to master
  • All packages got zapped, but not the chroots
  • Build postmarketos-mkinitfs again (this time it has a lower version count!)

Solution: Simply zap your chroot! When it gets set up again, it will use the current package version.

Newer version in binary package repositories than in aports folder

You have built a package earlier, and the branch you are currently working in has a lower version in the aports folder.

Example how this can happen:

  • Git branch switch to a feature branch which increased the version of postmarketos-mkinitfs
  • Build postmarketos-mkinitfs
  • Switch to master branch
  • Run just about any pmbootstrap command, it will print this warning:
 Package 'postmarketos-mkinitfs' in your aports folder has version X, but the binary package repositories already have version Y

Solution: Run pmbootstrap zap -m to delete the mismatched binary packages.

Note: If that does not help it, you can manually delete that specific packages from your aports folder: sudo rm ~/.local/var/pmbootstrap/packages/*/postmarketos-mkinitfs*.apk and run pmbootstrap index to re-index all packages. See also: #466, #474

Screen output flicker and inactivity

If you notice a very brief flicker upon boot, but immediately disappears and screen turns black, you might have a buggy framebuffer Qualcomm MDSS MDP3 driver.

You can try patching the source code by removing the function assigned to the mdp3_interface->off_fnc in the mdp3_ctrl.c file.

See example patch: 05_fix_mdp3_ctrl_off.patch

Screen output messed up

If the output on the screen is not aligned correctly (see picture) it's probably because you have a wrong value in /sys/class/graphics/fb0/bits_per_pixel.

You can try patching the source code by setting a different video mode (RGB/ARGB/RGBA/YCRYCB/...).

See example patch: 06_fix_mdss_fb_rgb_mode.patch

Packaging for aarch64: ./config.guess: unable to guess system type

This happens in packages built with autoconf (./configure; make; make install), when it ships an outdated config.guess file in the source code. Adjust your APKBUILD's prepare() function like done in #698.

Device reboots

  • If your device always reboots after the same time (e.g. 2 minutes) after booting, you probably need to feed (or disable) a watchdog. Try to search your kernel config for watchdog, and also the internet for watchdog + your phone name.
  • Android: The kernel config option CONFIG_ANDROID_LOW_MEMORY_KILLER may cause reboots. Please check if you have disabled it. If this helps you, please let us know, so we can consider checking for this option.
  • Android: it is possible to get the dmesg log from just before the crash after the reboot if you enable some kernel options.

ERROR: ... BAD archive

If you pmbootstrap log shows something similar to the following:

(005853) [22:25:47] (native) % apk --no-progress add -u qemu-user-static-repack qemu-user-static-repack-binfmt
WARNING: Ignoring /mnt/pmbootstrap-packages/x86_64/APKINDEX.tar.gz: No such file or directory
(1/2) Installing qemu-user-static-repack (2.8-r9)
ERROR: qemu-user-static-repack-2.8-r9: BAD archive
(2/2) Installing qemu-user-static-repack-binfmt (2.8-r9)
1 error; 20 MiB in 36 packages
(005853) [22:25:53] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

...then downloading a package (in this case qemu-user-static-repack) failed. Please delete the broken package and try it again:

$ cd ~/.local/var/pmbootstrap/ # go into your work folder, as specified in 'pmbootstrap init'
$ sudo rm -v cache_apk_*/qemu-user-static-repack-* # adjust the failing package name accordingly

My Android device does not have partition labels, how do I know where to put the boot.img file etc?

  • Search online for the partitions, they are probably documented somewhere.
  • Try to dump all partitions. Run `file` on them, it should roughly tell you the contents. If that does not help, run binwalk.
    • file output: check if it is a kernel (vmlinuz), boot.img file or just "data".
    • In case you have "data", don't flash anything there, we probably can't generate that format yet. Please open an issue in GitHub or ask on the channel.
  • You can also look at recovery zips from other Android ROMs, that were released for your device. Extract it and look at META-INF/com/google/android/updater-script, search for commands starting with run_program("/sbin/busybox", "dd", they are for flashing partitions.
    • In one example, there was run_program("/sbin/busybox", "dd", "if=/tmp/boot.blob", "of=/dev/block/mmcblk0p4");, which means that a boot.blob file gets flashed to /dev/block/mmcblk0p4. That boot.blob file is also in the recovery zip - run the file program on it (see above).

mkbootimg: error: argument --dt: can't open '/boot/dt.img'

This happens when you have deviceinfo_bootimg_qcdt enabled (which is correct when pmbootstrap generated it that way), but your kernel does not generate the /boot/dt.img file. Please adjust your kernel APKBUILD as follows:

  • add dtbtool to makedepends
  • extend your build() function like this
  • and your package() function like that

See #688 for a plan to automatically generate the linux APKBUILD right.

pmbootstrap builds packages that it should download from the binary repo/that are already built

Most likely, this is issue #1023!

Try to disable the "timestamp based rebuilds" feature in "pmbootstrap init" as a workaround and please report this as a bug. We need the following for the bug report:

  • *enable* timestamp based rebuilds
  • pmbootstrap -v install (let it run until it starts building the package it should not build)
  • pmbootstrap log (we need the log from here!)

During initramfs generation: "modprobe: WARNING: Module drm not found in directory /lib/modules/..."

This means, that a module can not be put in an initramfs. When you are not using a mainline kernel, it is likely that there are no modules configured, but the code is built directly into the kernel. This means, it is expected and can be ignored.

du: unrecognized option: summarize

If you are using Alpine Linux and you encounter this issue, you will need to install the coreutils package.

sudo apk add coreutils