Driver problem with Nvidia 7950GTX

[Ira_Dosa]

Driver issue here.
Mageia2, NVIDIA 7950GTX.
nv, nouveau, nvidia only vesa works

Read all errata, wiki, and forum topics.
F3 grub 'xdriver=nvida' doesn't solve the problem either.

Anyone has it working?

[doktor5000]

Which same driver issue? Also there is no boot option "xdriver=nvidia".
What did you try already, and what did you change, and which error messages did you get?

[Ira_Dosa]

Sorry nothing to do with black dots/pixels but I only get black screens.
Only with driver vesa I don't get a black screen.
Tried mcc hardware graphical server under KDE and CLI
and XFdrake.
Test gives either blackscreen and returns to test option or freezes up my pc,
Messages: 'No screen' or EE: (log message)

F3/F6 adding 'driver=nvidia' to grub startup I read in the wiki.

[tom_]

can you post the exact name of your video card?

[Ira_Dosa]

mcc says:
Description: G71 [GeForce Go 7950 GTX]
and offer
Module: Card:NVIDIA GeForce 6100 to GeForce 360

[doktor5000]

F3/F6 adding 'driver=nvidia' to grub startup I read in the wiki.

Well, the wiki doesn't list that option: https://wiki.mageia.org/en/Mageia_2_Err ... rd_drivers

Apart from that, the "Test" option in the X-server configuration is not that relevant and may fail at times,
depending on the currently loaded driver and from where/how you launched it.

Please first go through https://wiki.mageia.org/en/Setup_the_graphical_server and post the results here.

[Ira_Dosa]

F3/F6 adding 'driver=nvidia' to grub startup I read in the wiki.

Well, the wiki doesn't list that option: https://wiki.mageia.org/en/Mageia_2_Err ... rd_drivers

https://wiki.mageia.org/en/Mageia_2_Errata#Nvidia

Code: Select all

 Nvidia
Live CDs

Depending on your card you may add in the grub (f6):
    xdriver=nouveau
    xdriver=nvidia
    xdriver=intel (if you have a system with both intel and nvidia gpu)


DVDs & Dual
See above, the procedure will be the same.

Apart from that, the "Test" option in the X-server configuration is not that relevant and may fail at times,
depending on the currently loaded driver and from where/how you launched it.

So this is a known bug?

Please first go through https://wiki.mageia.org/en/Setup_the_graphical_server and post the results here .

I will do.
(Apart from not using 'Test' I did it dozen of times already, but maybe test is making trouble).

[doktor5000]

F3/F6 adding 'driver=nvidia' to grub startup I read in the wiki.

Well, the wiki doesn't list that option: https://wiki.mageia.org/en/Mageia_2_Err ... rd_drivers

https://wiki.mageia.org/en/Mageia_2_Errata#Nvidia

Whoops, only looked at the ATI part, sorry for the noise

Apart from that, the "Test" option in the X-server configuration is not that relevant and may fail at times,
depending on the currently loaded driver and from where/how you launched it.

So this is a known bug?

To be honest, i've not used it since ages, but i know it doesn't work always and under every condition.
To my knowledge, there is no open bug report about that.

[Ira_Dosa]

Like all attemps earlier; black screen.
Also with extra grub option xdriver=nvidia

Vesa always works (even with test )

Output? Should I look for a system/startup log?

[tom_]

mcc says:
Description: G71 [GeForce Go 7950 GTX]
and offer
Module: Card:NVIDIA GeForce 6100 to GeForce 360

ok, the card is supported by porprietary driver:

http://www.geforce.com/drivers/results/47323

so please, with the network connected (MCC could need to download some packages),
install the nvidia driver and reboot the machine;

if the boot brings you again to a black screen, save the log file

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cp /var/log/Xorg.0.log /var/log/Xorg.0.log.saved

then back to vesa, reboot and post here the saved file

[Ira_Dosa]

My /var/log/Xorg.0.log.saved:

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[    29.995]
X.Org X Server 1.11.4
Release Date: 2012-01-27
[    29.995] X Protocol Version 11, Revision 0
[    29.995] Build Operating System: Linux_2.6.38.8-server-10.mga Mageia
[    29.995] Current Operating System: Linux expeter.localdomain 3.3.8-desktop-2.mga2 #1 SMP Mon Jul 30 21:42:09 UTC 2012 i686
[    29.995] Kernel command line: BOOT_IMAGE=linux root=UUID=85cdf8cb-9789-4f03-9382-66cf8c836bb8 splash quiet nokmsboot resume=UUID=fb5ca02c-4bc2-4a28-affb-b50ee0f1f995 vga=788
[    29.996] Build Date: 02 March 2012  06:41:02PM
[    29.996] 
[    29.996] Current version of pixman: 0.24.4
[    29.996]    Before reporting problems, check http://bugs.mageia.org
   to make sure that you have the latest version.
[    29.996] Markers: (--) probed, (**) from config file, (==) default setting,
   (++) from command line, (!!) notice, (II) informational,
   (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[    29.996] (==) Log file: "/var/log/Xorg.0.log", Time: Tue Nov  6 03:19:31 2012
[    29.996] (==) Using config file: "/etc/X11/xorg.conf"
[    29.996] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[    29.997] (==) ServerLayout "layout1"
[    29.997] (**) |-->Screen "screen1" (0)
[    29.997] (**) |   |-->Monitor "monitor1"
[    29.997] (**) |   |-->Device "device1"
[    29.997] (**) Option "DontZap" "False"
[    29.997] (**) Option "AllowMouseOpenFail"
[    29.997] (==) Automatically adding devices
[    29.997] (==) Automatically enabling devices
[    29.998] (==) FontPath set to:
   catalogue:/etc/X11/fontpath.d
[    29.998] (==) ModulePath set to "/usr/lib/xorg/extra-modules,/usr/lib/xorg/modules"
[    29.998] (II) The server relies on udev to provide the list of input devices.
   If no devices become available, reconfigure udev or disable AutoAddDevices.
[    29.998] (II) Loader magic: 0x822a5a0
[    29.998] (II) Module ABI versions:
[    29.998]    X.Org ANSI C Emulation: 0.4
[    29.998]    X.Org Video Driver: 11.0
[    29.998]    X.Org XInput driver : 13.0
[    29.998]    X.Org Server Extension : 6.0
[    29.999] (--) PCI:*(0:1:0:0) 10de:0297:1558:0571 rev 161, Mem @ 0xd9000000/16777216, 0xc0000000/268435456, 0xd8000000/16777216, I/O @ 0x00002000/128
[    30.001] (II) Open ACPI successful (/var/run/acpid.socket)
[    30.001] (II) "extmod" will be loaded by default.
[    30.001] (II) "dbe" will be loaded by default.
[    30.001] (II) "glx" will be loaded by default.
[    30.001] (II) "record" will be loaded by default.
[    30.001] (II) "dri" will be loaded by default.
[    30.001] (II) "dri2" will be loaded by default.
[    30.001] (II) LoadModule: "v4l"
[    30.035] (II) Loading /usr/lib/xorg/modules/drivers/v4l_drv.so
[    30.035] (II) Module v4l: vendor="X.Org Foundation"
[    30.035]    compiled for 1.11.2, module version = 0.1.1
[    30.035]    ABI class: X.Org Video Driver, version 11.0
[    30.035] (II) LoadModule: "extmod"
[    30.035] (II) Loading /usr/lib/xorg/modules/extensions/libextmod.so
[    30.035] (II) Module extmod: vendor="X.Org Foundation"
[    30.035]    compiled for 1.11.4, module version = 1.0.0
[    30.035]    Module class: X.Org Server Extension
[    30.035]    ABI class: X.Org Server Extension, version 6.0
[    30.035] (II) Loading extension MIT-SCREEN-SAVER
[    30.035] (II) Loading extension XFree86-VidModeExtension
[    30.035] (II) Loading extension XFree86-DGA
[    30.035] (II) Loading extension DPMS
[    30.035] (II) Loading extension XVideo
[    30.035] (II) Loading extension XVideo-MotionCompensation
[    30.035] (II) Loading extension X-Resource
[    30.035] (II) LoadModule: "dbe"
[    30.036] (II) Loading /usr/lib/xorg/modules/extensions/libdbe.so
[    30.036] (II) Module dbe: vendor="X.Org Foundation"
[    30.036]    compiled for 1.11.4, module version = 1.0.0
[    30.036]    Module class: X.Org Server Extension
[    30.036]    ABI class: X.Org Server Extension, version 6.0
[    30.036] (II) Loading extension DOUBLE-BUFFER
[    30.036] (II) LoadModule: "glx"
[    30.036] (II) Loading /usr/lib/xorg/extra-modules/libglx.so
[    31.348] (II) Module glx: vendor="NVIDIA Corporation"
[    31.348]    compiled for 4.0.2, module version = 1.0.0
[    31.348]    Module class: X.Org Server Extension
[    31.348] (II) NVIDIA GLX Module  295.71  Thu Aug  2 19:53:31 PDT 2012
[    31.348] (II) Loading extension GLX
[    31.348] (II) LoadModule: "record"
[    31.348] (II) Loading /usr/lib/xorg/modules/extensions/librecord.so
[    31.349] (II) Module record: vendor="X.Org Foundation"
[    31.349]    compiled for 1.11.4, module version = 1.13.0
[    31.349]    Module class: X.Org Server Extension
[    31.349]    ABI class: X.Org Server Extension, version 6.0
[    31.349] (II) Loading extension RECORD
[    31.349] (II) LoadModule: "dri"
[    31.349] (II) Loading /usr/lib/xorg/modules/extensions/libdri.so
[    31.349] (II) Module dri: vendor="X.Org Foundation"
[    31.349]    compiled for 1.11.4, module version = 1.0.0
[    31.349]    ABI class: X.Org Server Extension, version 6.0
[    31.350] (II) Loading extension XFree86-DRI
[    31.350] (II) LoadModule: "dri2"
[    31.350] (II) Loading /usr/lib/xorg/modules/extensions/libdri2.so
[    31.350] (II) Module dri2: vendor="X.Org Foundation"
[    31.350]    compiled for 1.11.4, module version = 1.2.0
[    31.350]    ABI class: X.Org Server Extension, version 6.0
[    31.350] (II) Loading extension DRI2
[    31.350] (II) LoadModule: "nvidia"
[    31.350] (II) Loading /usr/lib/xorg/extra-modules/nvidia_drv.so
[    31.455] (II) Module nvidia: vendor="NVIDIA Corporation"
[    31.455]    compiled for 4.0.2, module version = 1.0.0
[    31.455]    Module class: X.Org Video Driver
[    31.489] (II) v4l driver for Video4Linux
[    31.489] (II) NVIDIA dlloader X Driver  295.71  Thu Aug  2 19:32:38 PDT 2012
[    31.497] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[    31.497] (++) using VT number 1

[    31.497] (WW) Falling back to old probe method for v4l
[    31.498] (II) Loading sub module "fb"
[    31.498] (II) LoadModule: "fb"
[    31.499] (II) Loading /usr/lib/xorg/modules/libfb.so
[    31.499] (II) Module fb: vendor="X.Org Foundation"
[    31.499]    compiled for 1.11.4, module version = 1.0.0
[    31.499]    ABI class: X.Org ANSI C Emulation, version 0.4
[    31.499] (II) Loading sub module "wfb"
[    31.499] (II) LoadModule: "wfb"
[    31.500] (II) Loading /usr/lib/xorg/modules/libwfb.so
[    31.512] (II) Module wfb: vendor="X.Org Foundation"
[    31.512]    compiled for 1.11.4, module version = 1.0.0
[    31.512]    ABI class: X.Org ANSI C Emulation, version 0.4
[    31.512] (II) Loading sub module "ramdac"
[    31.512] (II) LoadModule: "ramdac"
[    31.512] (II) Module "ramdac" already built-in
[    31.541] (II) Loading /usr/lib/xorg/extra-modules/nvidia_drv.so
[    31.541] (II) Loading /usr/lib/xorg/modules/libwfb.so
[    31.541] (II) Loading /usr/lib/xorg/modules/libfb.so
[    31.583] (**) NVIDIA(0): Depth 16, (--) framebuffer bpp 16
[    31.583] (==) NVIDIA(0): RGB weight 565
[    31.583] (==) NVIDIA(0): Default visual is TrueColor
[    31.583] (==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
[    31.583] (**) NVIDIA(0): Option "AddARGBGLXVisuals"
[    31.583] (**) NVIDIA(0): Option "DynamicTwinView" "false"
[    31.583] (**) NVIDIA(0): Enabling 2D acceleration
[    34.040] (WW) NVIDIA(GPU-0): Unable to read EDID for display device CRT-0
[    34.042] (II) NVIDIA(GPU-0): Display (Nvidia Default Flat Panel (DFP-0)) does not support
[    34.042] (II) NVIDIA(GPU-0):     NVIDIA 3D Vision stereo.
[    34.045] (II) NVIDIA(0): NVIDIA GPU GeForce Go 7950 GTX (G71) at PCI:1:0:0 (GPU-0)
[    34.045] (--) NVIDIA(0): Memory: 524288 kBytes
[    34.045] (--) NVIDIA(0): VideoBIOS: 05.71.22.38.33
[    34.045] (II) NVIDIA(0): Detected PCI Express Link width: 16X
[    34.045] (--) NVIDIA(0): Interlaced video modes are supported on this GPU
[    34.045] (--) NVIDIA(0): Connected display device(s) on GeForce Go 7950 GTX at
[    34.045] (--) NVIDIA(0):     PCI:1:0:0
[    34.045] (--) NVIDIA(0):     CRT-0
[    34.045] (--) NVIDIA(0):     Nvidia Default Flat Panel (DFP-0)
[    34.045] (--) NVIDIA(0): CRT-0: 400.0 MHz maximum pixel clock
[    34.045] (--) NVIDIA(0): Nvidia Default Flat Panel (DFP-0): 330.0 MHz maximum pixel
[    34.045] (--) NVIDIA(0):     clock
[    34.045] (--) NVIDIA(0): Nvidia Default Flat Panel (DFP-0): Internal Dual Link LVDS
[    34.045] (**) NVIDIA(0): Using HorizSync/VertRefresh ranges from the EDID for display
[    34.045] (**) NVIDIA(0):     device Nvidia Default Flat Panel (DFP-0) (Using EDID
[    34.045] (**) NVIDIA(0):     frequencies has been enabled on all display devices.)
[    34.045] (II) NVIDIA(0): Assigned Display Device: DFP-0
[    34.045] (WW) NVIDIA(0): No valid modes for "1152x864"; removing.
[    34.045] (WW) NVIDIA(0): No valid modes for "832x624"; removing.
[    34.045] (WW) NVIDIA(0): No valid modes for "480x360"; removing.
[    34.045] (II) NVIDIA(0): Validated modes:
[    34.045] (II) NVIDIA(0):     "1600x1200"
[    34.045] (II) NVIDIA(0):     "1400x1050"
[    34.045] (II) NVIDIA(0):     "1280x1024"
[    34.045] (II) NVIDIA(0):     "1280x960"
[    34.045] (II) NVIDIA(0):     "1024x768"
[    34.045] (II) NVIDIA(0):     "800x600"
[    34.045] (II) NVIDIA(0):     "640x480"
[    34.045] (II) NVIDIA(0):     "320x240"
[    34.045] (II) NVIDIA(0): Virtual screen size determined to be 1600 x 1200
[    34.046] (--) NVIDIA(0): DPI set to (126, 152); computed from "UseEdidDpi" X config
[    34.046] (--) NVIDIA(0):     option
[    34.046] (WW) NVIDIA(0): 32-bit ARGB GLX visuals are only supported in depths 24 and
[    34.046] (WW) NVIDIA(0):     30.
[    34.046] (WW) NVIDIA(0): Disabling 32-bit ARGB GLX visuals.
[    34.271] (II) NVIDIA(0): Setting mode "1600x1200"

[tom_]

it seems a problem with your monitor,
it does not recognize it and starts with a "Nvidia Default Flat Panel (DFP-0)"

in the last log line it is trying to set a screen size.

[ 34.271] (II) NVIDIA(0): Setting mode "1600x1200"

Which kind of monitor do you have?
has it some video/mouse/keyboard switch or some other special hardware?

[doktor5000]

Also please post the contents of your

Code: Select all

/etc/X11/xorg.conf

[Ira_Dosa]

Which kind of monitor do you have?

HP2035 shown as L2035 or Plug'nPlay.
A simple flatscreen, no bells and whistles.

Other resolutions like 1024x768 or 800x600 also failed.

Works with all other Linux disto's that I use(d) except ROSA 2012Marathon, which fails already at Install level.

[Ira_Dosa]

/etc/X11/xorg.conf

Code: Select all

# File generated by XFdrake (rev 262502)

# **********************************************************************
# Refer to the xorg.conf man page for details about the format of
# this file.
# **********************************************************************

Section "ServerFlags"
    Option "DontZap" "False" # disable <Ctrl><Alt><BS> (server abort)
    AllowMouseOpenFail # allows the server to start up even if the mouse does not work
    #DontZoom # disable <Ctrl><Alt><KP_+>/<KP_-> (resolution switching)
EndSection

Section "Module"
    Load "v4l" # Video for Linux
EndSection

Section "Monitor"
    Identifier "monitor1"
    VendorName "Plug'n Play"
    ModelName "hp L2035"
    HorizSync 30-76
    VertRefresh 48-85
   
    # TV fullscreen mode or DVD fullscreen output.
    # 768x576 @ 79 Hz, 50 kHz hsync
    ModeLine "768x576"     50.00  768  832  846 1000   576  590  595  630
   
    # 768x576 @ 100 Hz, 61.6 kHz hsync
    ModeLine "768x576"     63.07  768  800  960 1024   576  578  590  616
EndSection

Section "Device"
    Identifier "device1"
    Driver "vesa"
    Option "DPMS"
EndSection

Section "Screen"
    Identifier "screen1"
    Device "device1"
    Monitor "monitor1"
    DefaultColorDepth 16
   
    Subsection "Display"
        Depth 8
        Modes "1600x1200" "1400x1050" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
    EndSubsection
   
    Subsection "Display"
        Depth 15
        Modes "1600x1200" "1400x1050" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
    EndSubsection
   
    Subsection "Display"
        Depth 16
        Modes "1600x1200" "1400x1050" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
    EndSubsection
   
    Subsection "Display"
        Depth 24
        Modes "1600x1200" "1400x1050" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
    EndSubsection
EndSection

Section "ServerLayout"
    Identifier "layout1"
    Screen "screen1"
EndSection

[doktor5000]

Well, all those modelines should actually not be needed. Just rename/move away /etc/X11/xorg.conf and reboot or logout and back in again.
Apart from that, you may want to run drakx11 again afterwards, and please tell here exactly what you selected, especially regarding monitor and resolution and options.

[Ira_Dosa]

It's getting routine

- renamed xorg.conf
- rebooted and started Mageia; a color palette with meshed up yellow and orange stripes appeared on the screen
- rebooted in safe mode; with XFdrake I picked the (default) GeForce 6100 to 360 card, the screen defaulted as Plug'n Play I didn't change and I choose a modest 1280x960
- rebooted and started Mageia; black screen
- rebooted in safe mode;
[EDIT} tried to copy the xorg.conf - but there was none !!
with XFdrake I picked vesa, Plug'n Play screen and resolution 1600x1200. Test worked.
- rebooted and started Mageia; KDE starts in 1600x1200 mode

You tell me ... (please)

[tom_]

Driver "vesa"

the xorg.conf you posted is for the vesa driver,
I guess the xorg.conf for the nvidia driver is more intresting..

[Ira_Dosa]

Driver "vesa"

I guess the xorg.conf for the nvidia driver is more intresting..

Oeps, forgot to mention:

Code: Select all

[EDIT} tried to copy the xorg.conf - but there was none !!

[tom_]

so you can try this way:

enable proprietary nvidia driver, reboot with blank screen,
go in recovery console and run nvidia-xconfig, reboot

nvidia-xconfig should create a default xorg.conf for the nvidia driver

[Ira_Dosa]

NVIDIA driver chosen again.
Reboot in safemode.
Renamed /var/log/
'nvidia-xconfig' generated various WARNINGS (Unable to find CorePointer in X config ... regarding mouse and keyboard keyboard) and

Code: Select all

Backed up file 'etc/X11/xorg.conf to 'etc/X11xorg.conf.backup'
'New X configuration file written to etc/X11/xorg.conf'

'startx' gave 'EE: error messages and the screen went black.

Rebooted.
Copied the ('nvidia') Xorg.conf which has the content:
Don't bother about the date/time stamp it is my bios

Code: Select all

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 295.71  (iurt@ecosse.mageia.org)  Thu Aug 16 19:47:04 UTC 2012

# File generated by XFdrake (rev 262502)
# **********************************************************************
# Refer to the xorg.conf man page for details about the format of
# this file.
# **********************************************************************

Section "ServerLayout"
    Identifier     "layout1"
    Screen         "screen1" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
EndSection

Section "Module"
    Load           "v4l" # Video for Linux
    Load           "glx"
EndSection

Section "ServerFlags"

    #DontZoom # disable <Ctrl><Alt><KP_+>/<KP_-> (resolution switching)
 # allows the server to start up even if the mouse does not work
    Option         "DontZap" "False" # disable <Ctrl><Alt><BS> (server abort)
    Option         "allowmouseopenfail"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Keyboard0"
    Driver         "keyboard"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "Monitor"

    # TV fullscreen mode or DVD fullscreen output.
    # 768x576 @ 79 Hz, 50 kHz hsync
    Identifier     "monitor1"
    VendorName     "Hewlett-Packard"
    ModelName      "HP L2035 Flat Panel Monitor"
    HorizSync       30.0 - 94.0
    VertRefresh     48.0 - 85.0
    ModeLine       "768x576" 50.00 768 832 846 1000 576 590 595 630
    ModeLine       "768x576" 63.07 768 800 960 1024 576 578 590 616
EndSection

Section "Device"
    Identifier     "device1"
    Driver         "nvidia"
    VendorName     "nVidia Corporation"
    BoardName      "NVIDIA GeForce 6100 to GeForce 360"
EndSection

Section "Screen"
    Identifier     "screen1"
    Device         "device1"
    Monitor        "monitor1"
    DefaultDepth    16
    Option         "DPMS"
    Option         "DynamicTwinView" "false"
    Option         "AddARGBGLXVisuals"
    SubSection     "Display"
        Depth       8
        Modes      "1600x1200" "1400x1050" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
    EndSubSection
    SubSection     "Display"
        Depth       15
        Modes      "1600x1200" "1400x1050" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
    EndSubSection
    SubSection     "Display"
        Depth       16
        Modes      "1600x1200" "1400x1050" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
    EndSubSection
    SubSection     "Display"
        Depth       24
        Modes      "1600x1200" "1400x1050" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
    EndSubSection
EndSection

Rebooted, chose 'vesa' and back again.

[Ira_Dosa]

Is it an idea to use an other driver like 304 or 285 instead?
Where can I find the repo for these DKMS rpms?

Is it an idea to use the .run installer/drivers provided on the NVIDIA site and to uninstall the DKMS version 295?

Just ideas.

[tom_]

if you type in you terminal

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man nvidia-xconfig

you can found a lot of nice otions like

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nvidia-xconfig −−mode=1600x1200

which could help you a lot, as this setting is missing in monitor section of your xorg.conf (nvidia version)

BTW,

'startx' geve 'EE: error messages and the screen went black.

these are the errors you are looking for,
so it would be very intresting to see them
if you cannot see them, try to press CTRL-ALT-F1 or CTRL-ALT-F2 when you have the blank screen,
you should be able to re see them.

or run

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startx  2>&1  file_to_be_posted.txt

so these lines will be saved on that file

more, you should run startx as normal user and no as root,
so before run startx, please do

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su - your_username

so you'll change user (type 'exit' to go back as root user)

[Ira_Dosa]

So, some more testing to do.

The Monitor section; I noticed too the lack of 'normal' high resolution settings.
Looked to me the settings for my DVB-T card.

I'll be back

[Ira_Dosa]

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nvidia-xconfig −−mode=1600x1200

Gave this input at safe mode prompt.
Doesn't have effect in xorg.conf (No addition in Monitor section, where it is named as modeLine.)

try to press CTRL-ALT-F1 or CTRL-ALT-F2 when you have the blank screen,
you should be able to re see them.

Doesn't work at safe mode prompt nor when black screen appeared.
Works in konsole / terminal.

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startx  2>&1  file_to_be_posted.txt

Started as user I got errors about not having Authority.
Run as root it started KDE desktop. (see note later)
I can't find however my file.
Tried twice. Second time with path.
No file!

more, you should run startx as normal user and no as root, so before run startx, please do

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su - your_username

Many distros don't allow root to get in graphical mode.
KDE login halt also any attempt (as long as default setting isn't changed by user)
Using a GUID program one should use 'su - program_name'

At Mageia2 safe mode prompt however root can use 'startx'