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skiwarz
Tux's lil' helper
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Joined: 23 Feb 2014
Posts: 132

PostPosted: Sun Nov 13, 2016 4:32 am    Post subject: RX460 problem Reply with quote

I just bought a Sapphire Radeon Rx 460 2GB, using it on an intel DG33BU motherboard (from approximately 2012 era).
In the BIOS, if I set the RX460 to be my primary display source, my computer won't even boot. It freezes before I can even "press F2 for bios setup".
When I set my onboard graphics as my primary display source, it boots, switches itself back over to my RX460, and grub spits out "no compatible video mode found" and then I can select my kernel.
Using the latest stable kernel (4.4.26) it boots, but according to https://wiki.gentoo.org/wiki/Amdgpu#Hardware_detection I need kernel 4.7 at least.
Using kernel 4.8.7 (~amd64), I get a kernel panic, but ONLY when I have my monitor physically connected to my RX460. But the kernel panic doesn't seem related to the video card. It says "Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,3)"
Does this sound motherboard/bios-related or kernel-related? Or both? The card is good, since it works on my windows pc.
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skiwarz
Tux's lil' helper
Tux's lil' helper


Joined: 23 Feb 2014
Posts: 132

PostPosted: Sun Nov 13, 2016 4:50 am    Post subject: Reply with quote

This is what I get in the kernel panic:
http://i65.tinypic.com/wuo31f.jpg
http://i64.tinypic.com/fvvb6o.jpg
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Buffoon
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Joined: 17 Jun 2015
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PostPosted: Sun Nov 13, 2016 4:51 am    Post subject: Reply with quote

A shot in dark. May be a power issue, motherboard may be unable to supply the power needed? Is your PSU up to the task?
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skiwarz
Tux's lil' helper
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Joined: 23 Feb 2014
Posts: 132

PostPosted: Sun Nov 13, 2016 5:47 am    Post subject: Reply with quote

Hmm... could be. Although the sapphire website recommends 300W power supply, minimum... and I have a 400. Maybe I'll unplug a hard drive, cd-rom, and some ram and see if it helps.
Also, My board is PCIe 2, which is also required by the card. So that's good.

edit: Just did all this... no effect


Last edited by skiwarz on Sun Nov 13, 2016 6:25 am; edited 1 time in total
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skiwarz
Tux's lil' helper
Tux's lil' helper


Joined: 23 Feb 2014
Posts: 132

PostPosted: Sun Nov 13, 2016 5:53 am    Post subject: Reply with quote

When I have the dedicated card set as my primary display output and it freezes on boot, it spits out POST code 5A, which corresponds to "Resetting PATA/SATA bus and all devices"
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skiwarz
Tux's lil' helper
Tux's lil' helper


Joined: 23 Feb 2014
Posts: 132

PostPosted: Sun Nov 13, 2016 5:26 pm    Post subject: Reply with quote

Buffoon wrote:
A shot in dark. May be a power issue, motherboard may be unable to supply the power needed? Is your PSU up to the task?


Buffoon, you're a great salesman. I just bought a new power supply, just in case XD
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