Radeon_hd cards non-functional on 64-bit

[vidrep]

Write hrev46950_x86_64 to USB stick within a4.1 Shutdown (64 bit has warm boot issue) Reboot All icons light Black screen (no signal) Serial debug log and listdev attached Have tested the following Radeon cardsas not working on 64 bit: HD2400, HD2600, HD3450, HD3550

[vidrep]

Tried hrev46955 using CD ISO image and Radeon card - same symptoms as described in ticket. Substitute Nvidia GeForce 8400 card - video working and installation to HDD proceeds normally. I have repeated this several times with the same result .

[kallisti5]

I can confirm seeing this on my system as well. I accidently started troubleshooting it as part of a more general PLL calculation issue :-)

The problem is here:

2008	radeon_hd: pll_compute: using minimum reference divider
2009	radeon_hd: pll_compute: performing fractional feedback calculations
2010	radeon_hd: pll_compute: Calculated pixel clock of 15 based on:
2011	radeon_hd: pll_compute:   referenceFrequency: 1010; referenceDivider: 1025
2012	radeon_hd: pll_compute:   feedbackDivider: 2048; feedbackDividerFrac: 0
2013	radeon_hd: pll_compute:   postDivider: 127
2014	radeon_hd: pll_compute: pixel clock 148500 was changed to 15

Your (and my) pixel clock is getting greatly reduced. This looks to be due to the referenceFrequency of "1010" (101 really is what it is pulling as referenceFrequency is * 10.

1010 really isn't valid.

On my card under x86_64 I dumped my AtomBIOS and the reference frequency is "2700", however atombios gets 1 at ​http://cgit.haiku-os.org/haiku/tree/src/add-ons/accelerants/radeon_hd/pll.cpp#n98...

KERN: radeon_hd: pll_compute: performing fractional feedback calculations
KERN: radeon_hd: pll_compute: Calculated pixel clock of 9 based on:
KERN: radeon_hd: pll_compute:   referenceFrequency: 10; referenceDivider: 1025
KERN: radeon_hd: pll_compute:   feedbackDivider: 2048; feedbackDividerFrac: 0
KERN: radeon_hd: pll_compute:   postDivider: 2
KERN: radeon_hd: pll_compute: pixel clock 148500 was changed to 9

Most likely due to a type issue somewhere... no idea where though. Maybe somewhere in our AtomBIOS.

[vidrep]

Installed hrev47847 to hard drive partition. Confirmed Radeon HD2400 (RV610 IGP), HD3450 (RV620), and HD3550 (RV620) all working at native 1920x1080 resolution. I believe this ticket can be closed now.

[luroh]

Thanks!