unetbootin fails to create filesystem.size resulting in installer crashes

Hello,

Thank you for taking the time to report this bug and helping to make Ubuntu better. While we appreciate the difficulties you are facing, it would appear that the CD image (ISO file) you downloaded could be corrupt or was not copied correctly to your USB installation media. There is an easy way to verify the integrity of the Ubuntu ISO files you download. Could you please visit https://help.ubuntu.com/community/HowToMD5SUM follow the instructions and report back as to whether or not the MD5SUM verified?

If the procedure I indicate shows that the image is corrupt or wasn't copied correctly, I'd recommend erasing your USB drive and trying to create the USB installer again.

Thanks in advance.

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Ubuntu Bug Squad volunteer triager
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Exception during installation:
Aug 30 09:17:37 Ultra python: Traceback (most recent call last):
Aug 30 09:17:37 Ultra python: File "/usr/share/ubiquity/install.py", line 608, in <module>
Aug 30 09:17:37 Ultra python: install.run()
Aug 30 09:17:37 Ultra python: File "/usr/share/ubiquity/install.py", line 122, in run
Aug 30 09:17:37 Ultra python: self.copy_all()
Aug 30 09:17:37 Ultra python: File "/usr/share/ubiquity/install.py", line 299, in copy_all
Aug 30 09:17:37 Ultra python: assert os.path.exists(fs_size), "Missing filesystem.size."
Aug 30 09:17:37 Ultra python: AssertionError: Missing filesystem.size.
Aug 30 09:17:37 Ultra python:
Aug 30 09:18:03 Ultra lircd-0.8.7-pre3[968]: read invalid data from device /dev/lirc0
Aug 30 09:32:28 Ultra kernel: [ 1654.030835] ALSA hda_intel.c:1682: azx_pcm_prepare: bufsize=0x10000, format=0x4011
Aug 30 09:32:28 Ultra kernel: [ 1654.030860] ALSA hda_codec.c:1228: hda_codec_setup_stream: NID=0x6, stream=0x8, channel=0, format=0x4011
Aug 30 09:32:28 Ultra kernel: [ 1654.030887] ALSA hda_intel.c:1682: azx_pcm_prepare: bufsize=0x10000, format=0x4011
Aug 30 09:32:28 Ultra kernel: [ 1654.030901] ALSA hda_codec.c:1228: hda_codec_setup_stream: NID=0x6, stream=0x8, channel=0, format=0x4011
Aug 30 09:32:33 Ultra kernel: [ 1659.745181] ALSA hda_codec.c:1291: hda_codec_cleanup_stream: NID=0x6
Aug 30 09:32:33 Ultra kernel: [ 1659.745296] ALSA hda_codec.c:1291: hda_codec_cleanup_stream: NID=0x6
Aug 30 09:42:23 Ultra kernel: [ 2249.080787] ALSA hda_intel.c:1682: azx_pcm_prepare: bufsize=0x10000, format=0x4011
Aug 30 09:42:23 Ultra kernel: [ 2249.080811] ALSA hda_codec.c:1228: hda_codec_setup_stream: NID=0x6, stream=0x8, channel=0, format=0x4011
Aug 30 09:42:23 Ultra kernel: [ 2249.080837] ALSA hda_intel.c:1682: azx_pcm_prepare: bufsize=0x10000, format=0x4011
Aug 30 09:42:23 Ultra kernel: [ 2249.080855] ALSA hda_codec.c:1228: hda_codec_setup_stream: NID=0x6, stream=0x8, channel=0, format=0x4011
Aug 30 09:42:28 Ultra kernel: [ 2254.792888] ALSA hda_codec.c:1291: hda_codec_cleanup_stream: NID=0x6
Aug 30 09:42:28 Ultra kernel: [ 2254.792995] ALSA hda_codec.c:1291: hda_codec_cleanup_stream: NID=0x6
Aug 30 09:45:26 Ultra kernel: [ 2432.211771] ALSA hda_intel.c:1682: azx_pcm_prepare: bufsize=0x10000, format=0x4011
Aug 30 09:45:26 Ultra kernel: [ 2432.211801] ALSA hda_codec.c:1228: hda_codec_setup_stream: NID=0x6, stream=0x8, channel=0, format=0x4011
Aug 30 09:45:26 Ultra kernel: [ 2432.211837] ALSA hda_intel.c:1682: azx_pcm_prepare: bufsize=0x10000, format=0x4011
Aug 30 09:45:26 Ultra kernel: [ 2432.211856] ALSA hda_codec.c:1228: hda_codec_setup_stream: NID=0x6, stream=0x8, channel=0, format=0x4011
Aug 30 09:45:32 Ultra kernel: [ 2438.269143] ALSA hda_codec.c:1291: hda_codec_cleanup_stream: NID=0x6
Aug 30 09:45:32 Ultra kernel: [ 2438.269273] ALSA hda_codec.c:1291: hda_codec_cleanup_stream: NID=0x6
Aug 30 09:45:59 Ultra sudo: pam_sm_authenticate: Called
Aug 30 09:45:59 Ultra sudo: pam_sm_authenticate: username = [ultra]
Aug 30 09:47:28 Ultra kernel: [ 2554.401946] ALSA hda_intel.c:1682: azx_pcm_prepare: bufsize=0x10000, format=0x4011
Aug 30 09:47:28 Ultra kernel: [ 2554.401970] ALSA hda_codec.c:1228: hda_cod...

The tool you've used (likely unetbootin) to create the USB image of Ubuntu did not copy all the needed files for installation. You need /casper/filesystem.size on the USB disk for the installation to complete.

Status changed to 'Confirmed' because the bug affects multiple users.

My bug report was classified as a duplicate for this. Is there a workaround for this bug? Is it possible to complete the installation? The bug was opened two month ago, it was for a different installation package. Has anybody been able to install Ubuntu?
And I have the filesystem.size file on my installation media.

Is filesystem.size located at /cdrom/casper/filesystem.size? Its possible to use usb-creator-gtk to make a usb disk from which you can install Ubuntu.