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Why Xorg/x11 shows only 4:3 aspect resolutions?

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Hi All.
In my modest -66year old user- experience with Linux (using Suse as early as ver:9, trial and error way, as I never studied UNIX or C, only Jurasic machine hex, Assembly, Fortran, CPM and Basic. My first computer: 1974 home made 7 segment LEDs, hex keyboard, Signetics-2650 and Zilog Z80, S100bus, 512bytes static RAM).
OpenSuse after X11 was adopted for good, WXGA resolutions for the 16:10 aspect ratio, i.e. 1440x900, 1920x1080, regardless brand of Wide LED monitors (I installed AOC 19wide, Viewsonic Optiquest 19wide, Samsung 22wide) on GPU (i.e. nVidia as GF8000series, 520GT , radeon equivalents) are hardly detected-configured. Grub and Grub2 often miss the mentioned wide screen resolutions at installations. After upgrades automatically installed new versions, more likely your gear next reboot will start grub2 with the lowest possible colour-resolution (nomodeset or whatever), and x11 autodetect - splash resolutions list will go no further than 4:3 aspect and 1024x768. Installing the proprietary drivers at boot, by editing grub2 as in OpenSuse 12.2, 12.3 and now 13.1 is confusing, lag of console resources and painful... It was still fine when one could jump to init 3 and open-close sessions as SU, install the drivers and edit xorg.config file. Now Ctrl+Alt+F3 jumps to a console one cannot use, since one's usual user or root log and password are not longer accepted... Wonder why?
:'(

-OpenSuse 12.3 Dartmouth on AthlonXII-64, amd chipset, native Radeon, 4Gb ram, nVidia 5200Gt-2Gb + Viewsonic Optiquest Q191wb.
-OpenSuse 13.1 (Bottle) (x86_64) on Phenom II X6 Tubocore, nVidia chipset, native nVidia, 16Gb ram, nVidia GF8500-500Mb + Samsung Syncmaster S22B150N.
Tks.

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