gnome-shell gradually blurs everything in all windows and even the tray, how to fix?

It began 3 days ago, I am not sure what I could have changed. I ran metacity –replace and everything looks correct (but I lose the top tray bar). As soon I run gnome-shell –replace the horrible gradually blurring everything everywhere begins… It seems to start after 00:00h (when “NightLight” is automatically resumed), not fully…

CMAKE missing: X11_EXECUTABLE)

I’m trying to compile a program using CMAKE, but it requires X11 to be installed. I have X11 installed on my system. When I run apt-file find x11.so I get the output: aeolus: /usr/lib/aeolus/aeolus_x11.so banshee: /usr/lib/banshee/Backends/libbnpx11.so baresip-x11: /usr/lib/baresip/modules/x11.so fcitx-module-x11: /usr/lib/x86_64-linux-gnu/fcitx/fcitx-x11.so gmerlin-plugins-base: /usr/lib/x86_64-linux-gnu/gmerlin/plugins/i_x11.so gmerlin-plugins-base: /usr/lib/x86_64-linux-gnu/gmerlin/plugins/ov_x11.so keepassx: /usr/lib/x86_64-linux-gnu/keepassx/libkeepassx-autotype-x11.so kwin-x11: /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so libdirectfb-extra: /usr/lib/x86_64-linux-gnu/directfb-1.7-7/systems/libdirectfb_x11.so libjogl2-jni: /usr/lib/jni/libnativewindow_x11.so libsuil-0-0: /usr/lib/x86_64-linux-gnu/suil-0/libsuil_x11.so libva-dev:…

Why don’t my eigenvalues for A*Atranspose and Atranspose*A match?

import numpy as np import matplotlib.pyplot as plt import scipy.linalg as la A = np.array([[-5,-5,-1,0,0,0,500,500,100], [0,0,0,-5,-5,-1,500,500,100], [-150,-5,-1,0,0,0,30000,1000,80], [0,0,0,-150,-5,-1,12000,400,80], [-150,-150,-1,0,0,0,33000,33000,220], [0,0,0,-150,-150,-1,12000,12000,80], [-5,-150,-1,0,0,0,500,15000,100], [0,0,0,-5,-150,-1,1000,30000,200]]) print(“Matrix A is :\n”, A) A_Trans=np.transpose(A) print(“Transpose is:\n”,A_Trans) prod1=np.dot(A,A_Trans) print(prod1) u,v = la.eigh(prod1) print(“Eigen values of AAT are \n”,np.abs(u)) print(“Corresponding eigenvectors of AAT in the columns: \n”,np.abs(v)) prod2=np.dot(A_Trans,A) print(prod2) w,x = la.eigh(prod2) print(“Eigen…