The title says it all; at some point Ubuntu 18.04 stops playing sound and the only available sound device is "Dummy Output". Apart from rebooting (which fixes the issue) this command executed from the terminal fixes the issue: pulseaudio -k && sudo alsa force-reload Contributed by user Kim, source: https://superuser.com/questions/17312/restart-ubuntu-sound-processes-via-command-line
Category: Uncategorized
AWS diaries: serving HTML from lambda
AWS lambda is a neat feature that runs code in response to requests and transforms the code's output into some response. Requests can be an event occurring in the AWS platform such as an S3 modification or an HTTP request. The response is an MVC-style model which needs to pass through some network component, like … Continue reading AWS diaries: serving HTML from lambda
Goodhart’s law
Any observed statistical regularity will tend to collapse once pressure is placed upon it for control purposes. Goodhart's law (source Wikipedia) Or, in other words, once you tell people "improve that KPI or else", that KPI will be abused to the point of becoming useless: the KPI will improve, but the overall quality/speed/cost (pick a … Continue reading Goodhart’s law
Digitalisation vs. Automation: it is about capabilities
A pre-digital organisation focuses on efficient processes implementation; a digital organisation focuses on capabilities.
Ubuntu on the ASUS VivoBook 17
Following the proud tradition [1],[2],[3] of documenting Linux installations on all the hardware I break, I'm happy to report that Ubuntu 18.04 works fine on the ASUS VivoBook 17 (model number X705U). Things I tested and that work: OS boots from USB and from harddisk Secure boot WLAN USB On board and external (USB) camera … Continue reading Ubuntu on the ASUS VivoBook 17
Thunderbird forgetting passwords
After a simultaneous Thunderbird upgrade and profile migration from Windows to Linux the mail program permanently forgets passwords. The setting: Thunderbird 52 on Windows Back up profile Restore profile to Thunderbird 60 on Linux Observe that all passwords to all accounts are lost even if entered again This seems to be some … Continue reading Thunderbird forgetting passwords
Software architecture for 5G networks
The 5G mobile network specification introduces network function virtualization [NFV] which enables mobile network operators (carriers henceforth) to expose network resources to business applications as PaaS solution building blocks [SBB]. Naturally, this moves 5G into the focus of software architecture. Unsurprisingly, the NFV specs detail services from the carrier's point of view, so they are … Continue reading Software architecture for 5G networks
About focus
There are three conceptual combinations of temporality, significance and impact which require our attention: urgency (I either deal with it now or not at all), importance (I can deal with it later, but I can’t afford to ignore it) and opportunity (I may safely ignore it, but there are significant benefits if I don't). While … Continue reading About focus
Cloud-specific software architecture patterns
This post is about software application architecture patterns that simplify application design by leveraging cloud features. New: Download the cloud pattern cheat sheet Packaged configuration Packaged configuration cue card What Configuration is packaged with deployment artefacts Motivation Simplify system, increase resilience by removing runtime dependency on configuration service How Configuration is managed in configuration repository, … Continue reading Cloud-specific software architecture patterns
HTTP compression and incremental rendering
TL;DR: HTTP compression can delay rendering of web resources HTTP permits content to be served with different encodings, some of which can be used to compress [1] the data volume transferred over the network, which has become a frequent suggestion [2] towards optimising websites for performance. It turns out that the deflation phase of the … Continue reading HTTP compression and incremental rendering
