💻 Computer Black Screen Troubleshooting Log
My desktop computer is always kept on. Usually, I only turn off the monitor when I leave or don’t use it at night.
🚨 Problem Description After a routine operation, I discovered that the display was consistently in a black screen state. Attempting to power cycle the monitor, the screen still displayed “No Signal Input”. Using UU Remote Control to view the status, I found that both the desktop PC and another mini host were showing as online, indicating that the host itself may not have been shut down.
Desktop Boot Loader Failure
In July, on a whim, with nothing better to do over the weekend, I decided to clean out the dust from my desktop PC – it hadn’t been cleaned in four or five years, and there was definitely quite a lot of dust accumulated. After cleaning it, I restarted the system, and everything worked perfectly fine. The computer wasn’t turned off regularly; it was left
Cross-machine computation time difference
The existing communication protocol within the group uses steady_clock as a timestamp to calculate the latency for each individual node. In a specific scenario, a message packet’s built-in timestamp was used, and this timestamp originated from another machine – resulting in an anomalous latency calculation.
As a side note: Gemini2.5 Pro shows promise of completely surpassing GPT-4.
WeChat Backup Tool Local Network Recognition Failed
I regularly clear out data on my phone, including photos and WeChat chat logs, backing them up to my computer. Previously, it worked seamlessly, allowing me to easily identify both my mobile phone and desktop PC within the same local network and directly back up the chat records to my computer. However, today everything has been failing.
Memory Layout and Binary Compatibility
C++ service crashed. The service depends on a static library for compilation.
The static library made modifications, adding members to the header file and re-publishing the binary static library file.
The service relies on the new binary library file, compiles and runs normally, but then crashes. The crash point appears fine, similar to the crashes caused by compiler upgrades – undefined behavior, an untrustworthy stack trace.
Updating the service’s dependent header files allows it to mutate correctly, and running also works normally.
A detailed explanation is needed, involving computer science knowledge, I suspect it’s related to memory layout, with examples for a thorough explanation.
Protobuf Zero Value Pitfalls: When Default Values Become an Invisible Killer of Business Logic
The US stock market has three trading sessions: pre-market, live market, and post-market. The logic for pushing data – whether it’s full data or numerical increments – is optimized to conserve bandwidth (sending as little data as possible). Initially, only the full dataset is sent in the first transmission; subsequent transmissions are incremental updates of all fields.
Why not use the optimal solution? This involves multiple project teams, some of which have been live for many years.
Background Service TCP Communication Anomaly Troubleshooting
Business Model: The backend service establishes a connection with the group’s market data gateway using TCP. Each time a connection is established, it must first send an authorization request and then continuously send heartbeat packages to maintain the connection status.
However, one day, an alert message was received indicating that the service had disconnected. After carefully examining the logs, it was discovered that the backend service was continuously sending heartbeat packages, but the other party did not respond at all, yet the connection remained open.
Visual Studio loading a mismatched PDB file
When debugging programs under Windows using Visual Studio, if the PDB file does not match the executable file, Visual Studio will display “Unable to load symbol file.” The program crashes and generates a crash dump. If it’s an mismatched PDB file, Visual Studio cannot smoothly enter the crash site.
What is a PDB File? A PDB file is a debugging information file created by Microsoft, used for debugging programs. It contains information such as the symbol table, source code filenames, line numbers, and other debugging data.