[Bug 19960] radeon{,hd} driver can't run a LCD at certain resolutions/timings over DVI

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=19960





--- Comment #29 from Alex Deucher <agd5f at yahoo.com>  2009-10-21 15:29:24 PST ---
You might try setting different pll flags.  Some monitors don't like certain
pll combinations.  In atombios_crtc_set_pll() in atombios_crtc.c try setting
pll_flags to each of the following:
RADEON_PLL_PREFER_LOW_REF_DIV
RADEON_PLL_PREFER_HIGH_REF_DIV
RADEON_PLL_PREFER_LOW_FB_DIV
RADEON_PLL_PREFER_HIGH_FB_DIV
RADEON_PLL_PREFER_LOW_POST_DIV
RADEON_PLL_PREFER_HIGH_POST_DIV
RADEON_PLL_USE_FRAC_FB_DIV
RADEON_PLL_PREFER_CLOSEST_LOWER
before calling RADEONComputePLL() and see if any of them help.


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