Originally Posted by R71800XSS
Originally Posted by kev8
At this point, I think I can exclude RAM and VGA, and just have to RMA motherboard or CPU.
I have 4 doubts remaining (maybe only @elmor
1) Since I swapped the HDD from previous PC, with Athlon II X3, is it possible that, in Ubuntu, the AMD microcode of the previous CPU messed up Ryzen CPU? Is the microcode rewritten to correct one each time I flashback a BIOS?
2) Is it possible that something PCIExpress has been messed up by VGA or on CPU?
3) Is it possible that psensor
on ubuntu messed up motherboard when reading sensors?
4) Is it possible to have an explanation from ASUS BIOS guys of qcode 90 + VGA led? Does it refer to VGA, CPU/PCIE management, or RAM? (also to understand what part I have to RMA....)
Thank you in advance for possible answers, (if any)!
Sorry for long post.. and thank you for sharing your experiences, I am learning a lot..
1) No. In my case I had installed Ubuntu and w10 (two HDs) with Phenom II X4 and don't problems.
2) I don´t think it.
3) I don´t think it. I very much doubt that.
4) if Elmor wants reply to you
(Although I know he is very busy always
I think about motherboards' error, code 90 is about "BDS (Boot Device Selection) phase started" (I have not idea about it..look like system boot don't found and mobo hangs in this code).
While I think the hardware is pretty immune from damage due to trying to boot some version of Linux, you need to consider these steps.
(a) Try to boot with an empty HDD and see if a POST-completed screen appears (should have ROG logo). If so press del and go into the BIOS and make sure it can detect the drive you are using.
(b) Ryzen support starts with kernel 4.10. Assuming (a) works, then a live DVD or live USB should be used to install the latest (17.04) Ubuntu. Then upgrade to kernel 4.10.something, probably 4.10.0-20 (depends on what software manager presents as ready for Ubuntu; Ubuntu/Mint kernels 4.10.0-xx are built from mainstream kernels 4.10.yy.). Kernel 4.11.something may be available and useful.
(c) In all this the video drive may be limited to VESA, so a proper display presentation will have to wait until you can get a functioning OS to go into Synaptic to install a relevant driver for your video card.
"psensor" depends on "lm-sensors" that is not, as far as I know, yet updated for Ryzen. There is a hack out there I haven't yet tested, but until then, "psensor" won't show much. It is unlikely to damage anything, and in any case I don't think you had a functioning OS yet to run "psensor."
In my historical experience, when Linux boots it checks hardware and if the hardware is different from that of the build, Linux revises its configuration (long boot time possible). However, it may not do this successfully if it doesn't have access to the correct parameters, so this is why you might want to consider installing from a live USB and upgrading the kernel to a version that knows about Ryzen. That said, I installed Mint 18.1, which was built last fall on the 4.4 kernel, and it worked well enough to hack my way to a functioning system. It not only didn't know about Ryzen, it didn't know about my video card either, which made for some inconvenience at first.