Christians's questions

Shotcut fails to export to anything but webm and AVI with error:

[h264_nvenc @ 0x7f9c7c001f40] [Eval @ 0x7f9c90b19f60] Undefined constant or missing '(' in 'wpred'
[h264_nvenc @ 0x7f9c7c001f40] Unable to parse option value "wpred-dct8x8"
[aac @ 0x7f9c7c01ee40] [Eval @ 0x7f9c90b19ef0] Undefined constant or missing '(' in 'wpred'
[aac @ 0x7f9c7c01ee40] Unable to parse option value "wpred-dct8x8"
[h264_nvenc @ 0x7f9c7c001f40] Cannot load libcuda.so.1

I am on Ubuntu 21.04, [GeFOrce] GTX 1050, NVIDIA 510. This did not help:

sudo apt install nvidia-cuda-toolkit

Any ideas?

Firefox and Chromium do not open any longer. I fixed firefox by re-installing the snap. But re-installing chromium-browser did not help.

The error points to permission issues. What is the correct permission for the files and how could they have changed?

chromium-browser 
/snap/chromium/2011/snap/command-chain/desktop-launch: line 52: /home/username/.config/user-dirs.dirs: Permission denied
sed: can't read /home/username/.config/user-dirs.dirs: Permission denied
/snap/chromium/2011/snap/command-chain/desktop-launch: line 261: /home/username/.config/user-dirs.dirs: Permission denied
cp: cannot open '/home/username/.config/user-dirs.locale' for reading: Permission denied
/snap/chromium/2011/snap/command-chain/desktop-launch: line 266: /home/username/.config/user-dirs.locale: Permission denied
Failed to move to new namespace: PID namespaces supported, Network namespace supported, but failed: errno = Operation not permitted
Trace/breakpoint trap (core dumped)

-rw------- 1 username username 633 Apr 24  2020 /home/username/.config/user-dirs.dirs
-rw-rw-r-- 1 username username   5 Apr 24  2020 /home/username/.config/user-dirs.locale

Ubuntu 22.04

With a recent cups update my ML-1640 printer has stopped working.

A fresh post from ARCHLINUX offers a fix by downgrading to 2.3.3op1-1 from my current cups:amd64/hirsute 2.3.3op2-3ubuntu3.

How can I downgrade?

sudo apt-cache madison cups

only shows one version. Is this the right place to look: https://launchpad.net/ubuntu/hirsute/amd64/cups ?

Building from source

Do I need to build from source? If yes which? Can I use the ARCH archive https://archive.archlinux.org/packages/c/cups/? Or is it best to build from GIT https://github.com/apple/cups/releases ?

I can see the LibreOffice Calc auto-filter values, but the moment my mouse leaves the little expand-triangle the selector disappears, making auto-filter unusable. This only happens when fractional scaling is enabled on with my 4K monitor. Is there a setting that fixes this, or a workaround?

Ubuntu 20.10, GeForce GTX 1050, mvidia-driver-455

I am searching for a maintenance tool that cleans up left overs, including in /home, from uninstalled applications based on the history of my uninstalls.

These leftover files can be small and therefore stay under the radar of disk useage tools, but they can also be huge (a recent baloo index on .local/share was 27 GB).

This topic has been discussed over the years, but without resolve for me. In addition to my request I want the tool to find leftovers from previous OS installations that have wiped the install history.

PS:

• I appreciate that no package uninstall should remove user data, (see Why don't programs completely uninstall (remove all their files) when I remove them?).
• This excellent post What is the correct way to completely remove an application? covers how to remove ex-configs.
• I am aware of bleachbit. But it is brute force and has brought my computer to a halt by creating GBs of tmp data while cleaning.

On 19.04 under gnome, baloo creates a 64GB index, takes half my 16GB memory and 25% CPU.

After uninstalling baloo following baloo_file_extractor in Ubuntu 18.04 LTS taking up a lot of memory the problem goes away.

I still would like to understand:

• How did I get baloo, by installing dolphin maybe?
• What does baloo do for me when running gnome?

Libreoffice 6.2.2.2 20(Build:2) hangs on 19.04 with "Loading document.." on some but not all ODTs. I had no issues on 18.10. Note that I had removed the hidden lock files in the directory.

It was no linux file permission issue:

ls -l *odt
-rw-r--r-- 1 me me 160558 Aug 13  2018 fails.odt
-rw-r--r-- 1 me me  16466 Apr 22 22:32 works.odt

After removing /home/username/.config/libreoffice the problem goes away. Why was the file locked? Did something go wrong in the installation?

For the record: My fresh 19.04/Libreoffice gave me several warnings and errors, "failed to read path from javaldx", and locked up. I purged the Libreoffice installation and removed the config directory, and even installed java* as advised by the command-line messages.... very messy.

My 18.10 installation started to freeze a few days ago and strangely, even reverting to trusty 18.04 did not help. I am submitting this from Windoze and feel defeated.

• After reinstall of 18.10 the system freezes within 10 seconds to a minute, from dmesg:

  kernel: [ 54.156332] [drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure on pipe B (start=3401 end=3402) time 379 us, min 1192, max 1199, scanline start 1191, end 1217

  Before the freeze I can use a terminal, but sudo ls takes several seconds, and as soon as I open Firefox the FF icon gets bigger and bang the system freezes, same for typing into the super-key window after a few letters.

• same with Xorg and nvidia driver

• following https://www.dedoimedo.com/computers/intel-microcode-atomic-update.html I added /etc/modprobe.d/i915.conf containing

  options i915 enable_psr=0

  This really seemed to help for a few minutes... but then the system froze again.

• I reverted back to 18.04, which had worked for many months, but could not install a working system this time. After the boot message it went into Emergency mode with

  tpm_crb MSFT0101:00 [Firmware Bug]: ACPI region does not cover the entire command/response buffer.

• Adding acpi_os=! to the boot loader does not help.
• I have the latest BIOS installed with fastboot off.
• Live USB 18.04 and 18.10 boot fine.
• In desperation I disabled secure boot half way through my trouble, as I received PKCS#7 signature errors; not sure how relevant this could be. Troubleshooting above is with secure boot off and updates installed.

Please help as I am submitting this from Windoze ...)

My thumbnails are huge: a 20MB Nikon NEF image has a 18 MB thumbnail generated in PNG format in .cache/thumbnails.

Thumbnails for NEF did not show by default in 18.10. I followed Nautilus isn't displaying thumbnails for my NEF files (photo raw)

How can I reduce the size of my thumbnails?

Saving a nautilus search seems brilliant, as described in http://www.howtogeek.com/117494/7-ubuntu-file-manager-features-you-may-not-have-noticed/

But on my Ubuntu 16.04 the search is not executed. Instead the file is opened in Firefox.

When executed from the command line

> nautilus NEF.savedSearch

another instance of nautilus is opened instead of the search being executed.

This is the contents of the XML file generated after having saved the search:

;<?xml version="1.0" encoding="UTF-8"?>
<query version="1.0">
   <text>nef</text>
   <location>Desktop/Exif</location>
</query>

I cannot figure out where to install the boot loader on my Zenbook UX31A Prime. I have installed Ubuntu many times on normal hard drives, but this is the first SSD and I am struggling.

Installed Ubuntu 12.04 64-bit selecting "UEFI: general" boot entry.

• Installation type: Something Else
• Created partition /sda5 mount as /, /sda6 mount as /home, /sda7 mount as swap
• Selected /dev/sda for boot loader installation. Other options are /dev/sda, /dev/sda1/dev/sda3 Windows 7 (loader) ...

Grub comes up with 6 entries

1. Ubuntu - this runs great
2. Linux 3.2.0-29-generic recovery mode: mode hangs with "fb: conflicting fb hw usae interdrnfb vs EFI VGA - removing generic adapter"
3. memtest86:erro: unknown command `linux 16'
4. memtest86 serial: unknown command `linux 16'
5. Windows 7 (loader) (on /dev/sda3): invalid EFI file path
6. Windows Recovery Environment (on /dev/sda8): unknown command drivemap, invalid EFI file path.

My workaround for booting Windows 7 is hitting ESC during boot, windows boot manager comes up and * for booting into Windows 7 I select "WIndows Boot Manager (PO: SanDisk ....". * for booting into Ubuntu I select ubuntu (P0: SanDisk...)

How can I boot into Windows from Grub?