Sucess story: Mozilla pdf.js inverted images fixed in 6 hours
Firefox built-in PDF viewer pdf.js shows all images with inverted colors in a particular PDF file
The issue has been fixed by Mozilla team in a matter of 6 hours after reporting it.
LibreOffice broken color emojis on printing/PDF export
Could not print the document today: empty characters instead of emojis I use as an icons.
Exporting to PDF shows the same result: incorrect rendering of emojis.
LibreOffice supports PDF export from the command like. I've used Docker images to test different distros and versions.
- ArchLinux (LO 25.8.4.2 580 Build 2): tofu character
- Fedora 42 (LO 25.2.7.2-1.fc42): OK proper rendering
- Fedora 43 (LO 25.8.4.2 580 Build 2): blank character
- Ubuntu 26.04 (LO 25.8.4.2 580 Build 2): black-and-white printer emoji (different font)
Debian 12 GhostScript OPVP regression due to CVE fix backport
CVE-2024-33871 security vulnerability fix in Ghostscript package of Debian 12 Bookworm has broke OPVP module support, which is used by proprietary Canon printer drivers (Canon CAPT libcanonc3pl.so, libcanoncapt.so).
In other words, after the security issue fix, Canon CAPT printers using OPVP can no longer print.
GNU Screen v5 hangs on tty disappearence with USB UART devices
GNU Screen, the application which is usually used as a terminal multiplexor, also supports serial devices and could be used with USB COM or USB UART converter cables.
Starting from the new major Screen v5 release, unplugging the USB UART cable results in screen process indefinitely hanging in the background and not releasing the /dev/ttyUSB[n] device.
Plugging the USB UART cable again results in new /dev/ttyUSB[n+1] device, which is inconvenient.