https://bugzilla.kernel.org/show_bug.cgi?id=26552
--- Comment #10 from Alex Deucher alexdeucher@gmail.com 2011-01-13 16:54:22 --- In addition to the patch does booting with: radeon.disp_priority=2 on the kernel command line in grub help?
Additionally you can try these patches individually and see if any of them help?
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index 46178f9..50b4ef4 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -521,6 +521,7 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc, pll->flags = 0;
if (ASIC_IS_AVIVO(rdev)) { + pll->flags |= RADEON_PLL_PREFER_MINM_OVER_MAXP; if ((rdev->family == CHIP_RS600) || (rdev->family == CHIP_RS690) || (rdev->family == CHIP_RS740))
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index 46178f9..24aa984 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -521,6 +521,8 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc, pll->flags = 0;
if (ASIC_IS_AVIVO(rdev)) { + pll->flags |= (RADEON_PLL_PREFER_MINM_OVER_MAXP | + RADEON_PLL_USE_FRAC_FB_DIV); if ((rdev->family == CHIP_RS600) || (rdev->family == CHIP_RS690) || (rdev->family == CHIP_RS740))
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index 46178f9..fa8b96a 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -521,6 +521,7 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc, pll->flags = 0;
if (ASIC_IS_AVIVO(rdev)) { + pll->flags |= RADEON_PLL_USE_FRAC_FB_DIV; if ((rdev->family == CHIP_RS600) || (rdev->family == CHIP_RS690) || (rdev->family == CHIP_RS740))