After update: daily freeze of RPI2

[Cyber]

hi,

last week I updated one of my RPI2 and now it dies after about 36h running time.
I have definitely not changed anything else besides updating it.
I suspect one of the following packages, I would like to try the old kernel and it's dependencies first to narrow down what's causing it.
But, regrettably I cannot find e.g. raspberrypi-kernel 1.20200212-1 to download and install. are there any history mirrors availabe?

upgraded packages:

Code: Select all

libraspberrypi-bin:armhf (1.20200212-1, 1.20200601-1)
rpi-eeprom-images:armhf (7.0-1, 7.2-1)
libraspberrypi-doc:armhf (1.20200212-1, 1.20200601-1)
raspberrypi-ui-mods:armhf (1.20200218, 1.20200603)
pi-package-session:armhf (0.6, 0.7)
lxpanel-data:armhf (0.10.0-2+rpt7, 0.10.0-2+rpt10)
raspi-config:armhf (20200504, 20200601)
pi-package:armhf (0.6, 0.7)
rpi-eeprom:armhf (7.0-1, 7.2-1)
gtk2-engines-clearlookspix:armhf (1:2.20.7, 1:2.20.8)
libobrender32v5:armhf (3.6.1-8+rpt3, 3.6.1-8+rpt4)
obconf:armhf (1:2.0.4+git20150213-2+rpt2, 1:2.0.4+git20150213-2+rpt3)
raspberrypi-kernel:armhf (1.20200212-1, 1.20200601-1)
raspberrypi-bootloader:armhf (1.20200212-1, 1.20200601-1)
piwiz:armhf (0.11, 0.15)
libraspberrypi0:armhf (1.20200212-1, 1.20200601-1)
rpi-chromium-mods:armhf (20200407, 20200602)
arandr:armhf (0.1.9-2+rpt11, 0.1.9-2+rpt12)
lxplug-volume:armhf (0.20, 0.21)
rp-prefapps:armhf (0.18, 0.22)
pi-package-data:armhf (0.6, 0.7)
openbox:armhf (3.6.1-8+rpt3, 3.6.1-8+rpt4)
libobt2v5:armhf (3.6.1-8+rpt3, 3.6.1-8+rpt4)
pipanel:armhf (1:1.4, 1:1.5)
libgnutls30:armhf (3.6.7-4+deb10u3, 3.6.7-4+deb10u4)
ca-certificates:armhf (20190110, 20200601~deb10u1)
lxpanel:armhf (0.10.0-2+rpt7, 0.10.0-2+rpt10)
raspberrypi-sys-mods:armhf (20191105, 20200514)
rpd-plym-splash:armhf (0.21, 0.23)

The raspi is attached to a display and has only one job: displaying chromium with two very lightweight tabs.

It has the SD card only for booting up, rootfs is via nfs mount - it is always reachable.
the raspi freezes completely, does not react on inputs neither USB-keyboard nor network. it is monitored with munin and until the freeze it does not show any special hints in any graph. it looks just like always until it is dead.

Thanks for your help!

Best regards

[Cyber]

nobody?