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Operating Systems Linux Cannot boot as usuall , turn to black screen & ask for loging in ???? Help me???? Post 302884860 by hicksd8 on Wednesday 22nd of January 2014 07:51:27 AM
Old 01-22-2014
A black screen when Fedora 20 boots is not so unusual.

Perhaps the GUI cannot understand your graphics card.

Perhaps there's not enough free memory for the GUI. How much RAM is in the machine.

Don't try to login until the GUI starts otherwise you will interrupt the GUI starting.

Has the system had any updates since you installed it?

If you press <ctrl>-<alt>-<F2> does it give you a text terminal?
 

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fbconfig(1M)						  System Administration Commands					      fbconfig(1M)

NAME
fbconfig - Frame Buffer configuration utility SYNOPSIS
fbconfig [-list | -gui | -help] fbconfig [-dev device_filename] [-prconf] [-propt] [-res ?] fbconfig [-dev device_filename] [-res resolution-specification] device_specific_options DESCRIPTION
fbconfig is the generic command line interface to query and configure frame buffer attributes. The following form of fbconfig is the interface for the device independent operations performed by fbconfig: fbconfig [-list | -gui | -help] The following form of fbconfig is the interface for configuring a frame buffer: fbconfig [-dev device_filename] [-prconf] [-propt] [-res] If the -dev option is omitted, the default frame buffer (/dev/fb or /dev/fb0) is assumed. In the absence of specific options, the response will depend upon the device specific configuration program and how it responds to no options OPTIONS
The following options are supported: -dev device_filename Specify the FFB special file. The default is /dev/fbs/ffb0. -gui Invoke the Graphical User Interface (GUI). The GUI is available if the SUNWdcm package is installed. All other arguments are ignored. The GUI can configure devices (as an alternative to the fbconfig command line) and can update the Xservers file without directly edit- ing the file. The GUI allows the user that is logged in on the graphics device or devices to configure which graphics displays the win- dow system should use, their screen layout (where they appear on the user's desktop), and screen properties (X attributes). In addition, the GUI allows advanced users to create a new video format (resolution) that some graphics devices can select from fbcon- fig command line or from the device-dependent portion of the GUI. The GUI's online help explains all options and features. -help Print the fbconfig command usage summary. This is the default option. -list Print the list of installed frame buffers and associated device specific configuration routines. Device Filename Specific Config Program --------------- ----------------------- /dev/fbs/ffb0 SUNWffb_config /dev/fbs/ffb1 SUNWffb_config /dev/fbs/m640 SUNWm64_config /dev/fbs/cgsix0 not configurable -prconf Print the current hardware configuration. -propt Print the current software configuration. -res ? Print the current hardware resolution. OPERANDS
The following operands are supported: device_specific_options device_specific_options are specified in the format shown by the -help output, or the corresponding device-specific man page. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWfbc | +-----------------------------+-----------------------------+ SEE ALSO
SUNWgfb_config(1M), SUNWifb_config(1M), SUNWpfb_config(1M), SUNWzulu_config(1M), afbconfig(1M), ffbconfig(1M), m64config(1M), pgxcon- fig(1M), attributes(5) LIMITATIONS
Because of limitations in the m64 kernel driver and related software, fbconfig (with the -prconf option) is unable to distinguish between a current depth of 24 or 8+24. The -propt option returns the depth specified in the OWconfig file, which will be in effect following the next restart of the window system. The xwininfo utility, usually shipped in the package containing frame buffer software (such as SUNWxwplt), reports current depth of a specified window. SunOS 5.10 15 June 2004 fbconfig(1M)
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