#13536: Monitor complains with message: "Input Not Supported" with an Intel
i965Q
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Reporter: CodeforEvolution | Owner: kallisti5
Type: bug | Status: new
Priority: normal | Milestone: Unscheduled
Component: Drivers/Graphics/intel_extreme | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 1 | Platform: All
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Comment (by pulkomandy):
Alpha4.1:
{{{
1896 KERN: intel_extreme : hardware mode will actually be 1024x768
1897 KERN: PLL limits, min: p 5 (p1 1, p2 10), n 5, m 70 (m1 12, m2 7)
1898 KERN: PLL limits, max: p 80 (p1 8, p2 5), n 10, m 120 (m1 22, m2
11)
1899 KERN: required MHz: 65
1900 KERN: found: 65.1429 MHz, p = 28 (p1 = 2, p2 = 14), n = 6, m = 114
(m1 = 21, m2 = 9)
1901 KERN: PLL limits, min: p 5 (p1 1, p2 10), n 5, m 70 (m1 12, m2 7)
1902 KERN: PLL limits, max: p 80 (p1 8, p2 5), n 10, m 120 (m1 22, m2
11)
1903 KERN: required MHz: 65
1904 KERN: found: 65.28 MHz, p = 30 (p1 = 3, p2 = 10), n = 5, m = 102
(m1 = 19, m2 = 7)
}}}
Strange thing: why does it perform the search twice, and why does it not
find the same result for the same input?
Nightly:
{{{
KERN: intel_extreme: SetDisplayMode: Analog A 1024x768
174 KERN: intel_extreme: compute_dpll_9xx: required MHz: 65
175 KERN: intel_extreme: PLL limits, min: p 5 (p1 1, p2 10), n 5, m 70
(m1 12, m2 7)
176 KERN: intel_extreme: PLL limits, max: p 80 (p1 8, p2 5), n 10, m
120 (m1 22, m2 11)
177 KERN: intel_extreme: compute_dpll_9xx: best MHz: 65.28 (error:
0.28)
178 KERN: intel_extreme: compute_pll_divisors: found: p = 30 (p1 = 3,
p2 = 10), n = 5, m = 102 (m1 = 16, m2 = 10)
}}}
It finds the same timing as alpha4 second try, but with a different
setting for the M1/M2 values. Maybe it results in a less stable clock,
which your monitor then complains about? And why does it not pick the
better solution at 65.1429MHz?
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Ticket URL: <https://dev.haiku-os.org/ticket/13536#comment:8>
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