Re: [gentoo-user] AMDGPU KMS Problems

[P Levine]

On Fri, Jul 14, 2017 at 12:52 AM, jdm <jdm@××××××××××××.uk> wrote:
> On Thu, 13 Jul 2017 23:29:39 +0100
> jdm <jdm@××××××××××××.uk> wrote:
>
>> On Thu, 13 Jul 2017 03:12:49 -0400
>> P Levine <plevine457@×××××.com> wrote:
>>
>> > On Wed, Jul 12, 2017 at 5:34 PM, jdm <jdm@××××××××××××.uk> wrote:
>> > > Any thouhgts much appreciated.
>> >
>> > I tried helping to diagnose a similar problem for a user on Reddit
>> > recently, blackscreen/freeze with AMDGPU on boot. After trying
>> > everything else he switched the PCI slot the card was in and it
>> > booted up fine.  He then switched the card back to the original PCI
>> > slot and it still booted up fine.  It seemed to be some weird kind
>> > of hardware/bios hiccup.  If you've tried everything else, it
>> > wouldn't hurt to fumble around with the graphics card just to see
>> > if it makes a difference.
>> >
>>
>> Well, well, well.
>>
>> Bizarre. took out my old radeon r9 280 card and put the RX480 amdgpu
>> back in and rebooted to a kernel which I had configured for amdgpu
>> and booted with no issues, not needing modeset and xorg working fine
>> and dandy.
>>
>> Never seen anything like this before. Bring back the days when you had
>> a primary and secondary hard drives on a serial bus. Far easier when
>> you have to configure your own IRQs.
>>
>> Thanks for the advice.
>>
>> John.
>>
>>
> To prove that reseating the graphics has sorted the issue I have tried
> a few other distros and had no problems.
>
> John
>

Not sure what it is with AMDGPU that makes it so quirky.  Similar problem as
​ ​
https://www.reddit.com/r/Gentoo/comments/6gd4xh/having_kernel_and_xorg_issues_on_new_install_can/dj07pyl/