DMAR Kernel Log Errors and RAID Controller Crash

Problem: After upgrading an old HP ProLiant DL320 G6 Server to Linux kernel 6.1 (Devuan 5, Debian12) the system crashes during reboot. You will see the following kernel output: These errors are repeated several times, and the RAID controller driver “hpsa” for the SmartArray Controller P212 gives up, causing /dev/sda vanish. Discussion: While not absolutely […]

DMAR Kernel Log Errors and RAID Controller Crash Read More »

Icon Missing When Adding a Webpage to the Android Homepage

Problem: when adding a shortcut of a webpage to the Android home screen, Chrome used <link rel=”icon” …> to give this shortcut an icon. Lately Google Chrome broke this feature (intentionally probably). Chrome just shows a grey round circle with a single letter instead of the provided icon. Discussion: Google removed it’s claim “don’t be

Icon Missing When Adding a Webpage to the Android Homepage Read More »

Cisco “Smart” License

Problem: after upgrading Cisco ISO XE from 15 to 16 on an ASR-1001-X router, the permanent license of this router changes to “evaluation license” and Cisco forces you to use the call-home “feature”. You will find log entries like these: Discussion: Cisco enforces this call-home feature for newer software releases. There is not much you

Cisco “Smart” License Read More »

Interface down on Cisco Nexus switch with “dcxNoACKi”

Problem: After an update of a server to Devuan4/Debian11the switch shuts down the interfaces to the server with status “dcxNoACKi” 48 minutes after the reboot. Discussion: the switch is a Cisco Nexus 5000 switch. It implements “Data Center Bridging Capability Exchange (DCBX)”. The server is a Dell server with X710 Controller 10GbE with i40e drivers.

Interface down on Cisco Nexus switch with “dcxNoACKi” Read More »

Chrome Won’t Let You Proceed to Website with Invalid Certificate

As an IT professional it’s quite common that have to connect web servers with invalid certificates, for different reasons. For expample opening a management GUI of an appliance may be necessary to change its own certificate or TLS settings. Problem: sometimes chrome won’t let you open this website, and gives you no “Proceed on” button.

Chrome Won’t Let You Proceed to Website with Invalid Certificate Read More »