On 03/10/2021 03:45 AM, Andrei POPESCU wrote:
On Ma, 09 mar 21, 14:35:54, Richard Owlett wrote:On 03/09/2021 07:00 AM, Andrei POPESCU wrote:On Ma, 09 mar 21, 06:32:33, Richard Owlett wrote:On 03/08/2021 10:18 AM, songbird wrote:Richard Owlett wrote: ... before chasing down this rabbit hole, see if there is an upgrade for your current kernel on the debian backports site (for your processor and distribution type). i just had an issue with a new device not being recognized and updated my kernel (for stretch) and it worked fine after that.The more I think about my observed symptoms, it would seem logical to be kernel related. If the Linkzone is physically connected when PC is turned on, the boot process will hang until the Linkzone is disconnected.Please also provide info like the exact stage of the boot process, any (error) messages on screen, etc. I've seen this symptom with a laptop before, though it would hang at the BIOS stage (it was probably trying to boot from it), while you imply it's later.I think there are 2 separate states of the Linkzone may have when attempting to boot the PC. 1. The Linkzone is off but plugged into the PC. Boot appeared normal. 2. The Linkzone is turned on and I have waited for its indicator lights to indicate connection to network. This time the the screen was looping very quickly repeating that it was attempting to reset a USB device. What log should I look in for such an error message? I know I've seen description of how to interpret the boot process to gather information. But where?The boot process has three major stages. 1. POST: https://en.wikipedia.org/wiki/Power-on_self-test 2. Bootloader (grub, etc.) 3. Operating System (in this case Debian) In which of the above stages does the boot hang?
In yesterday's case, it was definitely case 3.In the case of getting a hang with blank screen I suspect it also was case 3, but I wasn't recording detailed symptoms the last time it happened.
I all cases I've heard the beep from POST.
I suspect also there is a subset of Case 2 -- The LinkZone had been used to interact with a website before being plugged into the PC under test.Sorry, can't imagine how a modem can be used to "interact with a web page" without being connected to a PC.
Consider this sequence of events. 1. PC and LinkZone powered off 2. Turn on PC 3. Debian boots normally 4. Turn on LinkZone 5. Browse a web site 6. Shut off PC power leaving LinkZone running on its battery 7. Wait 8. Turn on PC 9. Failure occurs