[haiku-bugs] Re: [Haiku] #8457: Blank screen after boot on Radeon Mobility 4670 HD
- From: "kallisti5" <trac@xxxxxxxxxxxx>
- Date: Tue, 02 Jul 2013 03:29:00 -0000
#8457: Blank screen after boot on Radeon Mobility 4670 HD
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Reporter: kvark | Owner: kallisti5
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Drivers/Graphics/radeon_hd | Version: R1/Development
Resolution: | Keywords: blank radeon
Blocked By: | Blocking: 7662
Has a Patch: 0 | Platform: x86
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Comment (by kallisti5):
sigh... your laptop is buggy :P
Partial fix applied in hrev45812
As for the black screen... I noticed the modeline calculations were a
little odd.
{{{
KERN: radeon_hd: radeon_set_display_mode: pll 0 selected for connector 0
3290 KERN: radeon_hd: pll_setup_flags: CRTC: 0, PLL: 0
3291 KERN: radeon_hd: pll_setup_flags: Spread Spectrum is 8%
3292 KERN: radeon_hd: pll_setup_flags: using Spread Spectrum reference
divider. refDiv was: 0, now: 98
3293 KERN: radeon_hd: pll_adjust: table 1.2
3294 KERN: radeon_hd: pll_adjust: was: 72330, now: 72330
3295 KERN: radeon_hd: pll_compute_post_divider: vco = 1200000
3296 KERN: radeon_hd: pll_compute_post_divider: postDiv = 16
3297 KERN: radeon_hd: pll_compute: using AtomBIOS reference divider
3298 KERN: radeon_hd: pll_compute: using AtomBIOS fractional feedback
divider
3299 KERN: radeon_hd: pll_compute: pixel clock: 72330 gives:
feedbackDivider = 2049.0; referenceDivider = 98; postDivider = 16
3300 KERN: radeon_hd: pll_compute: pixel clock 72330 was changed to
35282
3301 KERN: radeon_hd: display_crtc_ss
3302 KERN: radeon_hd: pll_set: table 1.3
3303 KERN: radeon_hd: pll_set: set adjusted pixel clock 35282 (was
72330)
3304 KERN: radeon_hd: display_crtc_set_dtd called to do 1366x768
3305 KERN: radeon_hd: display_crtc_fb_set: Framebuffer at: 0x0
3306 KERN: radeon_hd: display_crtc_fb_set: Set SurfaceAddress High: 0x0
3307 KERN: radeon_hd: display_crtc_fb_set: Set SurfaceAddress: 0x0
3308 KERN: radeon_hd: display_crtc_fb_set: fb: 1366x768 (32 bpp)
3309 KERN: radeon_hd: display_crtc_fb_set: fb pitch: 1376
3310 KERN: radeon_hd: display_crtc_fb_set: fb width aligned: 1376
}}}
This is the first time i've ever seen Spread Spectrum used. The
feedbackDivider is changed into something really incorrect.
--
Ticket URL: <http://dev.haiku-os.org/ticket/8457#comment:42>
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