I finally solved it the old way , which is something temporary at least so that I can do my job
ουδεν μονιμότερο του προσωρινού=nothing more permanent,from the temporary
well
i open terminal and hit su- as root
~]# xrandr
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192
LVDS-1 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
1280x800 59.98 +
1024x768 59.95*
800x600 59.96
640x480 59.94
720x400 59.97
640x400 59.96
640x350 59.84
VGA-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1024x768 60.00
800x600 60.32 56.25
848x480 60.00
640x480 59.94
HDMI-1 disconnected (normal left inverted right x axis y axis)
this is my normal resolution
~]$ cvt 1280 1024
# 1280x1024 59.89 Hz (CVT 1.31M4) hsync: 63.67 kHz; pclk: 109.00 MHz
Modeline "1280x1024_60.00" 109.00 1280 1368 1496 1712 1024 1027 1034 1063 -hsync +vsync
i create new mode with that resolution
xrandr --newmode "1280x1024_60.00" 109.00 1280 1368 1496 1712 1024 1027 1034 1063 -hsync +vsync
and add+ to menu panel (resolutions)
be careful in my case output name is VGA-1 xrandr --addmode VGA-1 "1280x1024_60.00"
now i have new
~]# xrandr
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192
LVDS-1 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
1280x800 59.98 +
1024x768 59.95*
800x600 59.96
640x480 59.94
720x400 59.97
640x400 59.96
640x350 59.84
VGA-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1024x768 60.00
800x600 60.32 56.25
848x480 60.00
640x480 59.94
1280x1024_60.00 59.89*
HDMI-1 disconnected (normal left inverted right x axis y axis)
but if i close my pc this mode lost for that i save to
my profile , in that case
./bash profile
and in this file I put the two previous commands
xrandr --newmode "1280x1024_60.00" 109.00 1280 1368 1496 1712 1024 1027 1034 1063 -hsync +vsync
xrandr --addmode VGA-1 "1280x1024_60.00"
and i save ,and then restarted my pc to see if it works .
for the moment work even temporarily
now I'll wait for the permanent solution
thanks for all
ΥΓ:PS : I found this solution on internet,I don't like it as a solution, but work...and the most important i use SL P8
Updated i find another solution to save new mode resolution,some time ago on internet ,and I decided to share it with you ,that too,
if you wont to save and change resolution at start up linux
without save in
./bash profile
i create new file with this name
10-monitor.conf on this directory
/etc/X11/xorg.conf.d/10-monitor.conf
and i put there this code
Section "Monitor"
Identifier "VGA-1"
Modeline "1280x1024_60.00" 109.00 1280 1368 1496 1712 1024 1027 1034 1063 -hsync +vsync
Option "PreferredMode" "1280x1024_60.00"
EndSection
Section "Screen"
Identifier "Screen0"
Monitor "VGA-1"
DefaultDepth 24
SubSection "Display"
Modes "1280x1024_60.00"
EndSubSection
EndSection
Updated2a little better
Section "Monitor"
Identifier "LVDS-1"
Option "LeftOf" "VGA-1"
EndSection
Section "Monitor"
Identifier "VGA-1"
Modeline "1280x1024_60.00" 109.00 1280 1368 1496 1712 1024 1027 1034 1063 -hsync +vsync
Option "PreferredMode" "1280x1024_60.00"
Option "RightOf" "LVDS-1"
Option "Position" "1280 0"
EndSection
Section "Screen"
Identifier "Screen0"
Monitor "VGA-1"
DefaultDepth 24
SubSection "Display"
Modes "1280x1024_60.00"
EndSubSection
EndSection
and now the resolution change at start up
But I'll keep waiting for the permanent solutionthanks again