Tag Archives: Ubuntu

Issue with Ubuntu 16.04 cross compiler gcc-arm-linux-gnueabihf version 4:5.3.1-1ubuntu1

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Adding this here because Google didn’t show very obvious matches for this problem.

I was trying to build a recent u-boot (for olinuxino-lime2), with the Ubuntu 16.04 supplied arm-linux-gnueabihf-as as supplied in package binutils-arm-linux-gnueabihf 2.26-8ubuntu2.1 that was installed as a dependency with apt-get install gcc-arm-linux-gnueabihf 4:5.3.1-1ubuntu1. I then got the following error:

  CC      arch/arm/cpu/armv7/sunxi/psci.o
{standard input}: Assembler messages:
{standard input}:302: Error: push/pop do not support {reglist}^ -- `pop {r0,r1,r2,r3,r4,r9,ip,pc}^'
scripts/Makefile.build:280: recipe for target 'arch/arm/cpu/armv7/sunxi/psci.o' failed
make[2]: *** [arch/arm/cpu/armv7/sunxi/psci.o] Error 1
scripts/Makefile.build:425: recipe for target 'arch/arm/cpu/armv7/sunxi' failed
make[1]: *** [arch/arm/cpu/armv7/sunxi] Error 2
Makefile:1210: recipe for target 'arch/arm/cpu/armv7' failed
make: *** [arch/arm/cpu/armv7] Error 2

This appears out to be due to a bug in gcc, possibly https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70830. I had better luck with Linaro’s https://releases.linaro.org/components/toolchain/binaries/5.3-2016.02/arm-linux-gnueabihf/gcc-linaro-5.3-2016.02-x86_64_arm-linux-gnueabihf.tar.xz as mentioned by Robert Nelson.

Ubuntu Server 14.04 installation: CD could not be mounted

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This happens a lot when trying to install Ubuntu Server 14.04 from USB stick (14.04.3 still has the issue).

[!! Detect and mount CD-ROM]
Your installation CD-ROM couldn't be mounted. This probably means that the CD-ROM was not in the drive. If so you can insert it and try again.
Retry mounting the CD-ROM?

.. and of course there is no CD-ROM at all, the installation media are on the USB drive. An easy way to work around this:

  1. Open a second console with Alt-F2 (get back to the installation dialogue with Alt-F1 later)
  2. Press enter to activate it
  3. Enter the following command to make /cdrom a softlink to /media:

    rmdir /cdrom; ln -s media /cdrom

  4. Go back to the installation process with Alt-F1
  5. Answer ‘yes’ to the question Retry mounting the CD-ROM?

From here on the installation should go on as normal.

TRIM on Linux not supported for modern Samsung SATA drives?

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Previous title: Discard/TRIM not getting through KVM/LVM/MD/SATA/SSD stack

I thought my TRIMs were being blocked by the virtualization/LVM stack, but it turns out the bare device won’t be TRIMmed either.

# fstrim /mnt/sde/
fstrim: /mnt/sde/: FITRIM ioctl failed: Operation not supported

According to this Algolia blog article there has been an kernel bug affecting these drives (mine is a Samsung 850 PRO 1TB), so I guess it has been blacklisted for the time being.