Categories
Linux Mastering Development

Cannot access BIOS after installing Linux

Since I installed Linux on my old laptop, I cannot access the BIOS menu. I have tried fwsetup but I just get a message saying: Could not set EFI variable ‘OsIndications’. I have also tried booting into Windows, holding shift and pressing restart and then once on the recovery screen, selecting Troubleshoot -> Advanced Options […]

Categories
Database Development

PG crashes after I run a big query after a C Functions

I noticed a weird behavior of PG. If I run a query using a C functions ( here the link – https://www.2ndquadrant.com/en/blog/compiling-postgresql-extensions-visual-studio-windows/) the simple add_one and then I run a select count(*) on a huge table the database crashes. This is a deterministic behavior, if I run from PG admin those 2 queries PG crashes […]

Categories
Database Development

How to connect Jira to remote PostgreSQL database?

I have installed Jira on my Windows 10 using local PostgreSQL, but now I have installed PostgreSQL on a VPS and want to connect my Jira to it. But I don’t know how to change following configuration files? data/postgresql.conf : # Memory units: kB = kilobytes Time units: ms = milliseconds # MB = megabytes […]

Categories
User Help

Adaptive Vertical Sync (VSync) option not available with Nvidia GTX 960 and “Standard” 445.87 driver

In the list of options for “Vertical sync” in the NVIDIA Control Panel, the option “Adaptive” does not appear beside the usual “On”, “Off”, “Use global…”, “Use 3D application…”. Here’s a list of my versions: GPU: NVIDIA GeForce GTX 960 Driver: 445.87 “Standard” (Not the Windows “DCH” version) NVIDIA Control Panel: 8.1.940 (Came with the […]

Categories
Linux Mastering Development Ubuntu

tiled monitor support ( LG 34wk95u )

I have an LG 34WK95U monitor that I can’t get to function at full 5120×2160@60Hz resolution in Ubuntu. The max I get is 3440×1440@60 or I can manually force 5120×2160@30 with xrandr but it’s not possible to select in the normal display settings. This is a branch of from my previous question High-res monitor support, […]

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Linux Mastering Development Ubuntu

High-res monitor support, 5120×2160, LG 34WK95

I have a new Dell Precission 5540 laptop that I connect to my LG 34WK95 display. In windows I get the full 5120×2160@60hz resolution, but in Ubuntu the best I can get is 3440×1440. The monitor is connect over thunderbolt (usb-c). Does anyone know how to fix this? Or at least where I should file […]

Categories
Mastering Development

Understand how ethtool disable auto-negotation in Micrel driver

I’m working on a custom Linux embedded board. It hosts a KSZ9031 as Ethernet controller. From command line I’m able to set its parameters, like link speed and auto-negotiations using ethtool, example: ethtool -s eth0 speed 100 duplex full autoneg off I’m interested to understand how the driver sets the internal registers of the KSZ9031 […]

Categories
Ask Engineering

DPDT switch to control DPDT relay

this is a bit of a long shot but here goes. I need to buy a speed controller for an electric ride on car and I’ve had no success in finding one with a reverse polarity switch and one that also accepts a hall sensor as a throttle, they all come with potentiometers which are […]

Categories
Mastering Development

xpath with multiple conditions which will contain ‘a’ and ‘div’ tag

Below is the full HTML tag where I want to use xpath with multiple conditions. <div class=”request-body comments-left-discription clickme” style=”cursor:pointer; ” id=”5e9b0″ title=”” data-placement=”bottom” data-toggle=”tooltip” mode=””> <div class=”desc-title”> <a target=”_blank” class=”site-color” href=”http://test://0316″>NirmalT</a> requested <a href=”http://test://0316″>Approval</a></div> <div class=”msg-time”><small><a rel=”tooltip” data-placement=”right” title=”” class=”site-color6″ href=”#” data-original-title=”Created on, “>ago</a> (020 )</small></div> Auto <br> <div class=”btn-hoverlayer” id=”button”> <a id=”accept” class=”b-btn-sm” […]

Categories
Mastering Development

Picocli not resetting collection field on each execution?

I have recently upgraded my project to Picocli 4.2.0, including the removal of all deprecated method calls, and I have been continuing the work I described here. I’m running into the same problem again — I have a field that doesn’t seem to reset. The only thing that’s different about this from my other question […]