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Title: Ubuntu Natty stuck at blank screen before login screen on 6 GPU (HD5850) Post by: polymorpher on July 27, 2011, 09:51:04 AM Everything was good with my dual 5850 until I added 4 more. Ubuntu Natty simply stuck at a blank screen (without internet connection) after the logo "Ubuntu" is loaded. I tried the following (through recovery mode):
1. Reinstall the driver: tried auto install from Ubuntu, and from the package downloaded from ATI website. Also tried manual install. 2. aticonfig --initial -f --adapter=all 3. aticonfig --initial -f --adapter=0,1,2,3,4,5 4. In /etc/X11/xorg.conf ServerLayout section, change "RightOf ...screen...1", "RightOf ...screen...2..." .... to "RightOf ...screen...0..." and other layouts (also tried set resolution to 800x600) 5. In /etc/X11/xorg.conf ServerLayout section, change "RightOf..." to 0 0 None of them work, I couldn't enter login screen unless I run "aticonfig --initial -f" which only enables the first device. It doesn't solve the problem. Of course, all cards can be detected by aticonfig (aticonfig --list-adapters), and atiflash in MS-DOS. GPU-Z can detect all 6 GPUs on Windows. Motherboard: GA890FXA-UD7 I think a small change in xorg.conf should be able to fix this - for the moment, I am trying to increase the number of adapters one by one. But it seems Ubuntu couldn't even start with only 2 adapters (aticonfig --initial -f --adapters=0,1) Title: Re: Ubuntu Natty stuck at blank screen before login screen on 6 GPU (HD5850) Post by: drgr33n on July 27, 2011, 10:03:16 AM IRQ error are my guess ? I've had this a few times and had to add a few flags to my boot configuration.
pci=acpi or acpi=noirq Title: Re: Ubuntu Natty stuck at blank screen before login screen on 6 GPU (HD5850) Post by: polymorpher on July 27, 2011, 10:16:59 AM Doesn't work. Since it works with 2 cards, I suspect one of the PCI-E x16 extension cable is defective.
Testing them one by one. Title: Re: Ubuntu Natty stuck at blank screen before login screen on 6 GPU (HD5850) Post by: polymorpher on July 27, 2011, 10:27:24 AM Boot successfully with 3rd card, but get temperature failed only on third card (flashed back to default BIOS), weird.
Title: Re: Ubuntu Natty stuck at blank screen before login screen on 6 GPU (HD5850) Post by: polymorpher on July 27, 2011, 11:54:49 AM Got it working with 4 cards but with 5th/6th card plugged in the problem persists. I will just try linuxcoin.
Title: Re: Ubuntu Natty stuck at blank screen before login screen on 6 GPU (HD5850) Post by: polymorpher on July 27, 2011, 12:58:16 PM Now with six cards it boots into scary white vertical lines, how fun is that
Title: Re: Ubuntu Natty stuck at blank screen before login screen on 6 GPU (HD5850) Post by: polymorpher on July 27, 2011, 02:09:05 PM Now, problem solved - just as I predicted, the problem was my Ubuntu was 32-bit! They should really add some documentation on this, most likely to be a design problem in kernel, not ATI's fault.
Title: Re: Ubuntu Natty stuck at blank screen before login screen on 6 GPU (HD5850) Post by: plastic.elastic on August 02, 2011, 04:32:36 PM Just curious, did you use dummy plugs?
Also did you try Linuxcoin instead? Thanks Title: Re: Ubuntu Natty stuck at blank screen before login screen on 6 GPU (HD5850) Post by: polymorpher on August 05, 2011, 12:18:10 AM Just curious, did you use dummy plugs? Also did you try Linuxcoin instead? Thanks No. I can't find anyone to sell me 50~150Ohm resistor in the city I live. I didn't try Linuxcoin. After all, Linuxcoin is still Linux. |