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JuszR
Tux's lil' helper
Joined: 03 Nov 2010
Posts: 124
Location: Tlv
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 Posted: Fri May 10, 2013 1:29 am Post subject: Black screen at boot process |
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I've recently emerged the power management modules in kernel (powersave, performance governor...) and now everytime i turn on the pc, it shows until "Waiting for udev..." then a black screen and i can see the login manager (slim).
How to fix that? |
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audiodef
Advocate
Joined: 06 Jul 2005
Posts: 4949
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JuszR
Tux's lil' helper
Joined: 03 Nov 2010
Posts: 124
Location: Tlv
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audiodef
Advocate
Joined: 06 Jul 2005
Posts: 4949
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| Posted: Mon May 13, 2013 3:34 pm Post subject: |
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What option is this?
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CONFIG_X86_ACPI_CPUFREQ_CPB=y
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I use CPU freq scaling and I don't see that in my .config. Everything else I have in CPU freq scaling is identical to yours, though, and my .config works.
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Hu
Watchman
Joined: 06 Mar 2007
Posts: 7613
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| Posted: Mon May 13, 2013 9:49 pm Post subject: |
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| drivers/cpufreq/Kconfig.x86: | config X86_ACPI_CPUFREQ_CPB
default y
bool "Legacy cpb sysfs knob support for AMD CPUs"
depends on X86_ACPI_CPUFREQ && CPU_SUP_AMD
help
The powernow-k8 driver used to provide a sysfs knob called "cpb"
to disable the Core Performance Boosting feature of AMD CPUs. This
file has now been superseeded by the more generic "boost" entry.
By enabling this option the acpi_cpufreq driver provides the old
entry in addition to the new boost ones, for compatibility reasons. |
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chithanh
Developer
Joined: 05 Aug 2006
Posts: 1390
Location: Berlin, Germany
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| Posted: Mon May 13, 2013 9:56 pm Post subject: |
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| If I had to guess, udev loads a KMS graphics driver module. If you have framebuffer console support built as module and not loaded, the screen will go dark, until X starts or the fbcon module is loaded. |
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JuszR
Tux's lil' helper
Joined: 03 Nov 2010
Posts: 124
Location: Tlv
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| Posted: Fri May 17, 2013 6:32 am Post subject: |
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I've added fbcon to the automatic loaded modues and it worked.
Thank you. |
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