Category: Blog

Citrix Workspace: “Unable to complete request”

For a while I have had an annoying issue with Citrix Workspace 2503.2. In the past, the Receiver application would hold and refresh my token, allowing for prolonged operation. I was able to show the main window over the course of the day and launch multiple applications.

At some point, I started receiving the error message “Unable to complete request” in the main window. The tray context menu switched from the standard menu with Sign In/Out, Connection Center etc. to a simple Open and Exit menu.

The Event Log showed that Receiver.exe was crashing due to this .net exception: The process was terminated due to an internal error in the .NET Runtime at IP 0x7395633A (0x73950000) with exit code 0x80131506.

So, what is going on? Simply put: The current version of .net Framework 8 (at the time of writing: 8.0.16) is causing some sort of regression that ultimately crashes background processes. This leads to the degraded user experience and service interruptions.

Uninstalling .net Framework 8.0.16 and re-installing 8.0.14 solves this issue. Be sure to install the x86 runtime for Citrix Workspace.

Traveler’s Notebook – A Versatile Companion

If you ever come across the EDC part of YouTube, you have probably seen the Traveler’s Notebook and it’s smaller sibling in passport size. A lot of people seem to treat it as a background for collages, an art project for Instagram or a gloried sticker album.

To me, these notebooks replace more traditional notebooks and planners. The advantage of Traveler’s refill system is that you can easily swap out parts of the notebook and add refills when needed, making it a more or less infinite binder system. Thanks to the various categories of inserts, I can easily add pouches to store keys or cards, small binders for documents and various types of paper.

I feel that it is important to have a completely analogue medium. I carry my passport-sized notebook with me whenever I leave the house, which gives me a quick notepad if I ever need to jot something down quickly – be it dates, prices, names or whatnot.

Smartphones are cumbersome to use and usually fail you due to poor network quality or a dying charge. Ink on paper is much less trouble and my handwriting easily outpaces my ability to tap away on my phone. My beloved Zebra F-701 snuggly hides away in the notebook, so I never have to worry about whether I have a pen on me or not.

When it comes to my work, I prefer the regular sized notebook. It allows me to quickly draft my ideas, so they are easier to bring into a clean form (i.e. when formulating requirements). The regular sized notebook clips two Lamy Safari fountain pens, each with Fine nibs and different colour inks. This helps me highlight, draw and correct information. I use dotted paper and clip it down, so I can work with both pages of a fold at once to award me more space.

I can only caution you to have an analogue medium as a workbook. Despite being a huge fan of computers for roughly 30 years now, I feel that there is no replacement for a good old sheet of paper and some imperfect scribbles.

A word of advise: Do not lose yourself in the perfection of formatting or trying to be smart about your layout. Instead, focus on what really counts: Information.

Jot down stuff. As soon as it is done, cross it out or mark it as done. Do not make your notebook your art project, make it something you actively use instead.

Disabling “Utility: Video Capture” on Chromium-based Browsers on Windows

I am using two Chromium-based browsers on my system: Wavebox and Vivaldi. Vivaldi is my everyday browser and Wavebox takes the place of dozens of Electron-based applications, like Discord or Google Chat.

Recently, my CPU usage would spike as soon as both browsers were running. Opening the Task Manager in both applications revealed a CPU usage of 50% for a process called “Utility: Video Capture”. This only happens when both browsers are open, leading me to believe that this is a bug in Chromium itself.

I don’t need nor want video capture on Vivaldi.

On Windows, your best bet to disable the process is to create a new registry key that disables the feature altogether. Trying to mess around with flags within the browser did not yield any results.

I will use Vivaldi as an example here, however a similar procedure should be applicable to most Chromium-based browsers.

Open regedit and navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Vivaldi.

If the key does not exist yet, create it. Within the “Vivaldi” key, create a DWORD32 named “VideoCaptureAllowed” and set its value to 0.

After restarting Vivaldi, the process no longer burns through my CPU cycles.

Some AKG K702 Notes

I have been happily using the AKG K702 reference headphones for a few years and can fully recommend them – especially for the price. However, there are two small maintenance related things, that I want to highlight using this platform:

Once you have to replace the velour ear pads, go with third-party leather ones. Bought a set of Geekria pads from Amazon and have been pretty happy with them. Paying around 40 EUR for a set of official velour replacements from AKG that I personally find uncomfortable is hard to justify when there are cheap leather ones available for the price of one official pad. The leather ones can easily be wiped, making them a superior choice, in my opinion.

The other pain point are the elastic straps on the headphones. The design is pretty elaborate and accessing the elastics is a bit of a pain. Do not use a tack to try and get the grills removed, as one often reads on the internet. If you have an iFixIt kit that came with pointy end tweezers, use these tweezers instead. Remember to twist the grill counter-clockwise to remove it. It does not take a lot of force – but requires good “grip”.

AutoHotkey: Resolve Environment Variables in an Input String

As the last little hack session of the year I wanted to build a AutoHotkey function to resolve all occurences of environment variables within an input string.

Normally, this would be pretty straight forward. Use WScript.Shell and call the ExpandEnvironmentStrings function with the input string.

Given that VBScript – and to my understanding WSH – are being deprecated by Microsoft, this solution would run on borrowed time.

Therefore the somewhat more clunky but more “future-proof” method is to rely on locating the %-characters and trying to parse the contents inbetween as environment variables.

We need to be wary of regular %-characters within the string to prevent accidental destruction of string values or false-positives.

So a pure AutoHotkey implementation could look like this:

; Input string
str := "This is 100% true! -- C:\Users\%USERNAME%\test -- %LOCALAPPDATA% -- %"

; Marks the last position of a %-character
lastPos := 0

Loop
{
    ; Find the next environment variable in the string
    pos1 := InStr(str, "%", false, lastPos + 1)
    if !pos1
        break
    pos2 := InStr(str, "%", false, pos1 + 1)
    if !pos2
        break

    ; Extract the environment variable name
    envVar := SubStr(str, pos1 + 1, pos2 - pos1 - 1)
    
    ; Try to get the value of the environment variable
    envValue := EnvGet(envVar)

    ; If the environment variable exists, replace it in the string
    if envValue
        str := SubStr(str, 1, pos1 - 1) . envValue . SubStr(str, pos2 + 1)

    ; Set the last position to the end of the replaced string
    lastPos := pos1
}

; Show the result
MsgBox(str)

This is, however, not the best way to do it. Since Kernel32.dll is loaded automatically in AutoHotkey anyway, using the ExpandEnvironmentStringsW function seems like a much better option:

; Input string
str := "This is 100% true! -- C:\Users\%USERNAME%\test -- %LOCALAPPDATA% -- %"

; Allocate buffer for the expanded string
VarSetStrCapacity(&str2, 1024)

; Call ExpandEnvironmentStringsW to expand environment variables
DllCall("ExpandEnvironmentStringsW", "wstr", str, "wstr", &str2, "uint", 1024)

; Show the result
MsgBox(str2)

Why reinvent the wheel when the platform developer already provides a function for it?

AutoHotkey: Wait for Process to Exit

In today’s small hack session the requirement sounds rather simple: Wait for a given process to exit and then exit the AutohotKey script itself – all while being non-blocking.

The most obvious choice would be a simple loop that checks whether the process still exists. This is also the implementation you will find when searching for this problem on the web. The drawback of this approach is the high cost in runtime, so that is no good; why would I want to burn CPU cycles constantly?

A much better way is to register a callback with Windows and have the operating system notify you once the process has exited.

#Requires AutoHotkey v2.0.2
#SingleInstance Force

DllCall("LoadLibrary", "Str", "Kernel32.dll")

ProcessExitCallback := CallbackCreate(OnProcessExit)

; Function to register a callback for process exit
RegisterForProcessExit(pid) {
    ; Open the process handle with SYNCHRONIZE access
    hProcess := DllCall("OpenProcess", "UInt", 0x00100000, "Int", 0, "UInt", pid, "Ptr")

    if (!hProcess) {
        MsgBox("Failed to open process handle. Error: " DllCall("GetLastError"), "Error opening process handle", "OK IconX")
        return
    }

    ; Create a variable to hold the wait handle
    waitHandle := 0

    ; Register the wait
    success := DllCall("Kernel32.dll\RegisterWaitForSingleObject"
        , "Ptr*", &waitHandle         ; Output wait handle (mutable variable)
        , "Ptr", hProcess            ; The process handle
        , "Ptr", ProcessExitCallback ; The callback function
        , "Ptr", pid                 ; The parameter passed to the callback (PID)
        , "UInt", 0xFFFFFFFF         ; INFINITE wait time
        , "UInt", 0x00000000)        ; WT_EXECUTEONLYONCE

    if (!success) {
        MsgBox("Failed to register wait. Error: " DllCall("GetLastError"), "Error registering callback", "OK IconX")
        DllCall("CloseHandle", "Ptr", hProcess)
        return
    }
}

; The callback function to execute when the process exits
OnProcessExit(param, TimerOrWaitFired) {
    ExitApp(0)
}

; Main script execution
pid := ProcessExist("Notepad.exe") ; Replace with your target process name
if pid
    RegisterForProcessExit(pid)
else
    MsgBox("Notepad.exe is not running!", "Notepad", "OK IconX")

The callback approach has the advantage of being able to run in the background for a long time without noticeable performance impact.

AutoHotkey: Center a Window on the Program’s display

This holiday was all about window management and AutoHotkey for me. Despite the name sounding a lot like AutoIt and being based off of it, AHK is a pretty different beast.

Today’s small hack session is all about centering the active window on the screen the window is on. For that to work, we first have to determine the window’s position and width, then calculate the window X and Y center point, then loop through the displays to get their work area properties and determine which of the displays the window is most likely on.

After that we can calculate the new X and Y positions based on the window dimensions and the determined display work area.

    activeWindow := WinExist("A")
    if !activeWindow
        return

    ; Retrieve the active window's current position and size
    WinGetPos(&winX, &winY, &winWidth, &winHeight, activeWindow)

    ; Calculate the center of the window
    windowCenterX := Round(winX + winWidth / 2, 0)
    windowCenterY := Round(winY + winHeight / 2, 0)

    ; Get number of monitors - but only ones used for the desktop!
    monitorCount := SysGet(80)

    ; Set initial value to check if we found the monitor the window is on...
    monitorIndex := -1

    ; Loop through each monitor to find which one the window is on...
    ; Do this by checking on which monitor the center of the window is, otherwise we get false positives.
    Loop monitorCount {
        MonitorGetWorkArea(A_Index, &workAreaX, &workAreaY, &workAreaWidth, &workAreaHeight)

        if (windowCenterX >= workAreaX and windowCenterX <= workAreaWidth
            and
            windowCenterY >= workAreaY and windowCenterY <= workAreaHeight)
        {
            monitorIndex := A_Index
            break
        }
    }

    ; If still initial value, exit...
    if monitorIndex = -1
        return

    ; Get the dimensions of the determined monitor's work area
    MonitorGetWorkArea(monitorIndex, &workAreaX, &workAreaY, &workAreaWidth, &workAreaHeight)

    ; Calculate new position to center the window
    newX := Round(workAreaX + ((workAreaWidth - workAreaX) - winWidth) / 2, 0)
    newY := Round(workAreaY + ((workAreaHeight - workAreaY) - winHeight) / 2, 0)

    ; Move the window to the new position
    WinMove(newX, newY, , , activeWindow)

This works nicely on multi-monitor setups.

PowerShell: Checking a Font for Specific Glyphs

I had the requirement to check which of the fonts installed on my machine supported Japanese numerals. The easiest way to actually verify this was by doing it through a Powershell script.

The method below only works on Windows machines since it relies on the PresentationCore assembly.

param (
    [switch] $Verbose
)

Add-Type -AssemblyName PresentationCore

# List of Japanese numerals to check
$japaneseNumerals = @(
    [char] 0x4E00, # 一
    [char] 0x4E8C, # 二
    [char] 0x4E09, # 三
    [char] 0x56DB, # 四
    [char] 0x4E94, # 五
    [char] 0x516D, # 六
    [char] 0x4E03, # 七
    [char] 0x516B, # 八
    [char] 0x4E5D, # 九
    [char] 0x5341  # 十
)

# Function to check if a font contains a specific glyph
function FontSupportsCharacter {
    param (
        # The font name to check
        [string] $fontName,
        # The character to check
        [char] $character
    )

    try {
        # Create a GlyphTypeface object for the font
        $typefaces = (New-Object System.Windows.Media.FontFamily($fontName)).GetTypefaces()
        foreach ($typeface in $typefaces) {
            $glyphTypeface = $null
            $typeface.TryGetGlyphTypeface([ref]$glyphTypeface) | Out-Null
            if ($glyphTypeface -and $glyphTypeface.CharacterToGlyphMap.ContainsKey([int][char]$character)) {
                return $true
            }
        }
    } catch {
        # Handle errors, e.g., if the font cannot be loaded
        Write-Verbose -Message "Error loading font: ${fontName}"
    }

    return $false
}

if ($Verbose) {
    $VerbosePreference = "Continue"
}

# Get all installed fonts
$installedFonts = (New-Object System.Drawing.Text.InstalledFontCollection).Families

# Loop through each installed font
foreach ($font in $installedFonts) {
    $glyphFound = $true
    foreach ($numeral in $japaneseNumerals) {
        $exists = FontSupportsCharacter -fontName $font.Name -character $numeral
        if (-not $exists) {
            $glyphFound = $false
            Write-Verbose -Message "Font `"$($font.Name)`" does NOT contain glyph for `"${numeral}`" (U+$([System.String]::Format("{0:X4}", [int][char]$numeral)))."
            break
        }
    }

    if ($glyphFound) {
        Write-Output "Font `"$($font.Name)`" contains all Japanese numerals."
    }
}

Personally, I would expect the operating system to be able to filter fonts, but unfortunately it falls to the user to gain these insights.

tacky-borders enables beautiful, animated borders on Windows

Perhaps you have seen those beautiful, configurable and often animated borders on Hyprland and wished that something similar existed on Windows 10/11.

With tacky-borders‘ upcoming version 1.0 you can get a good number of those features on Windows.

The software can be configured through a yaml file and allows customization of the border thickness, radius, colors, animation and allows application-specific overrides for a number of settings to make sure the borders are properly aligned on applications like Chrome-based browsers.

tacky-borders allows for the “spin” animation, which can be combined with a gradient color setting to create a nice looking RGB crawl around the active window.

Previously I have been using Komorebi’s own implementation, which had a few drawbacks. The border was not as configurable, it was quite pixelated and there was a notable delay when switching between windows. tacky-borders solves all of those issues.

While these features may sound tacky (no pun intended!) to you, having a configurable visual indicator for the active window is incredibly handy in an age where applications render their own titlebars (or lack them altogether). It brings an element of visual clarity, which I highly appreciate.

Why Shiori is still the best Read It Later software

Archiving web contents is important. Not only to have an exact copy of the content from the time you were reading it, but also as a means of preserving the information in an ever volatile world.

In the past I was a huge fan of del.icio.us, a social bookmarking and tagging service. Syncing my bookmarks across different devices felt like the best choice – until I had visited some of the links and found myself in a world of dead links. Ever since then I have been trying to keep an archived copy of the sites around.

Personally, I still think that historious is an absolutely awesome service and I happily pay the subscription fee every year. historious handles more complex sites like reddit or YouTube perfectly and is a great way to quickly archive, tag and search – basically my old del.icio.us workflow but on steroids.

However, this still means you are reliant on someone else to host the service for you. And with the volatile way the web is, historious might just disappear tomorrow. The answer: Host your own application to do the job. But which one?

Over the course of 2023 and 2024 I have evaluated multiple different solutions with very different ideas how to approach the problem of how to archive a website and – more importantly – what to archive from a website.

I always come back to what I personally consider the best software around: Shiori.

While Shiori has some issues with reddit posts, it handles classic forum posts just fine. The content extractor also allows to archive PDF files and news articles from pretty much all the websites I ever visit. Unlike solutions like Obsidian’s Web Clipper that often picks the wrong content, I can be confident that I do not need to double-check the archive of everything I push into Shiori.

Shiori also has a basic Manifest v2 browser extension that allows tagging and saving contents with two clicks – absolutely awesome and all you really need! It does one thing and it does it well.

You have plenty of control to determine on a post-by-post basis whether an archive is available publicly or not and the user interface works great on mobile devices too.

Unlike Readeck or Wallabag, Shiori extracts the contents I want. This might not sound like a big deal to you, but for me it is incredibly important to have a solution I can depend on. Unlike MyBase the contents stays intact when being archived.

Over a long period of time I have come to the realization that for my use-case, Shiori simply seems to be the best fit. The out-of-box experience is just so smooth and stays out of your way. I cannot recommend the software highly enough.

Synology DSM7: “No Health Status”

After cleaning up my NAS I was greeted by a warning after restarting my DS2413+. My pool was in a degraded state, but all drives were fine? Checking the total pool use also did not give me any hints, as I still had plenty of free space.

Turns out none of my drives were reporting any health status anymore (“Health status not available”). Trying to open the S.M.A.R.T. values would just show an error about a failure to communicate with the drive. Those messages popped up for every drive. Did I kill my NAS during cleaning?

Of course not. Manually updating the S.M.A.R.T. database via Diskstation fixed the issue. Somehow the database got corrupted, possibly during an automated update?

Anyway, after updating the database the status turned back to all green. For good measure, I did run a scrub on my pool.

OBS – Websocket Stays Open After Exiting

I have been plagued by this issue for a while: After closing OBS, a zombie process would continue to block the TCP port previously used by OBS’s websocket plugin. Trying to query the process ID never yielded any results. So what gives?

In my case, it turns out that the likely culprit was the OBS Droidcam plugin, which just received an update to mitigate exactly this misbehaviour.

After installing the update I can confirm that the zombie process and the listening TCP port no longer occur.

Why Video Game Consoles are Bad

I recently wondered why my Playstation 3 would turn on and stay in limbo. Turns out that the console was trying to update its firmware to version 4.90 and failed repeatedly.

The reason for all the commotion is error 8002F1F9, which turns out to be a faulty WiFi/Bluetooth board in the console itself.

On a PC, you would utter a sigh and replace the faulty component. On a Playstation 3 Slim you are shit out of luck. The console is now junk because the corresponding components are soldered right onto the motherboard, thus not being user-serviceable.

This is a sorry trend with mass-market electronics. I can get another second-hand Playstation 3 or try Sony’s awful cloud-gaming service, or I will have to dump all my games and use an emulator.

Only one of these routes ensures I can play Blur in 10 years: Emulation.

After Sony removed purchased video content from user libraries and given how fickle and stupid licensing agreements are for cloud-gaming, there is no way I will ever trust Sony with Playstation Now.

Similarly, there is no point in buying another set of ageing hardware, hoping it will last me this time.

Thankfully, my entire Playstation 3 library consists of physical media. Platform holders like Nintendo or Sony have a track record of dropping support for older devices, locking people from accessing their purchased digital content. This is why physical media is the way to go, and going through the process of dumping all your media is a must.

This way, you can play games and watch movies on a PC through emulators. The only digital storefront I have any trust in is Valve’s Steam. In the 20 years I have used Steam, it never failed me once. Meanwhile, Sony has repeatedly screwed me over.

I would also like to address that exclusivity is a cancer. Alan Wake 2 can be the best game of a decade – if it is locked to the Epic Game Store and unavailable on Steam, I do not care for it. Bloodborne is awesome, but I could not care less since it is trapped on a dead platform with shit FPS, forsaken by its creators and publishers.

Developers and publishers should bring their games to the only platform that has shown to be consistently backwards compatible over the last 30 years: The personal computer. Especially since newer generation consoles are essentially neutered PCs anyway.

Because whether you like it or not, your little black box will fail. And when it does, it will lock you out from playing your digital purchases. Not because it is impossible to provide you with proper backwards compatibility on newer systems but because you will begrudgingly buy the same game again and again. Nintendo knows it. Sony knows it.

Increasing SVP-4 stability on 32bit Zoom Player

The SmoothVideo Project is pretty awesome. My only gripe as a passionate user of Zoom Player is that the combination of LAV decoders and the ffdshow raw filter to inject SVP into the pipeline can be pretty unstable. Seeking around in playing media often leads to the media player crashing.

The culprit seems to be ffdshow. While the filter was an absolutely incredible and indispensable part of every afficionados’ filter graph a few years ago, the project is pretty much abandoned. So what are our options to mitigate the crashes without switching to mpv or another 64bit media player?

Turns out that CrendKing has built the awesome AviSynth Filter. After unpacking and installing the filters, we can alter Zoom Player’s Smart Play decoder settings:

Open Zoom Player’s Smart Play options and select a video decoder to test with. In this case, let’s alter the H264 configuration. Click “Configure”.

Select the LAV Video Decoder profile, click “Add Filter” and select the “AviSynth Filter” from the list. Make sure that LAV Video Decoder is the first filter and AviSynth the second.

Afterwards, click “Save active filter(s) as a New Profile”, give it nice name, increase the priority to top and select the profile to activate it. Close the dialogue with OK.

Apply the settings, restart Zoom Player and play a h.264 video file to test. You should see that SVP is active. Seeking in the video should no longer crash the entire player.

Adding Kagi as a Vivaldi Image Search Engine

Kagi, the search engine I was pretty hyped about a year ago, recently added support for loading up on credits via Paypal and other European-friendly, non-credit-card ways.

I have a ton of things to say about the way they flip-flop about their pricing model but that is neither here nor there. Today’s topic is all about adding Kagi to Vivaldi’s list of image search engines.

If you define the following image search URL for Kagi, the reverse image search will work in Vivaldi:

https://kagi.com/images?q={google:imageURL}&reverse=reference

That is some pretty hype stuff because that means I can fully kagi-fy my browser usage.

If you have Kagi’s Chrome extension installed, you will most likely need to uninstall or disable that extension. For some reason, Vivaldi (at the time of writing) ignores the search engine definitions created through the extension.