Kernel problem
Description: Debian GNU/Linux bullseye/sid
After a recent kernel update, my previously very stable laptop developed
major problems. After a period usually of about 12 hours (once after
only 2 hours, once after about 36), the machine froze, requiring a hard
power cycle. At no time did desktop indicators (Mate and Xfce) show CPU
hogging or memory shortage. Two more kernel updates did not resolve this
problem. There were frequent flickers of the display. I suspected that
the keyboard had become more sluggish, occasionally missing keystrokes
altogether.
On last starting the machine, I booted using the earliest installed
kernel 5.7.0-3 (5.7.17-1). The first thing I noticed was that the
keyboard was properly responsive again. It has now been running for over
27 hours with not so much as a missed keystroke. The display has been
rock solid again.
What change in 5.9 (perhaps 5.8) may be caused the machine to freeze,
and can it be fixed?
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