After X crash, max resolution was lowered [intel graphics]

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Hello, I have an HP Mini 110 netbook with Fedora 17 installed and fully updated.

$ uname -a
Linux tardis.subwavenetwork 3.8.3-103.fc17.i686 #1 SMP Mon Mar 18 15:57:42 UTC 2013 i686 i686 i386 GNU/Linux

The graphics chip is

00:02.0 VGA compatible controller: Intel Corporation Mobile 945GME Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)

lsmod | grep i915
i915                  535142  2 
video                  18551  1 i915
i2c_algo_bit           13065  1 i915
drm_kms_helper         45244  1 i915
drm                   217156  3 i915,drm_kms_helper
i2c_core               28449  5 drm,i915,drm_kms_helper,i2c_algo_bit,videodev

I use the VGA output of the netbook very often, connecting it to an LG 19LV2500 monitor. Sometimes as "extend", mostly VGA only (turning off the netbook's LVDS1 screen).

Normally, I can obtain the monitor's full resolution 1360x768 but I prefer 1280x720.

After a X crash, the computer cannot give anything more than 1024x768, which is extremely blurry (more than I'd even expect), while the computer, when the VGA cable is connected, boots with a resolution of 800x600 mirrored in both screens.

$ xrandr 
Screen 0: minimum 320 x 200, current 1024 x 600, maximum 4096 x 4096
LVDS1 connected 1024x600+0+0 (normal left inverted right x axis y axis) 222mm x 125mm
   1024x600       60.0*+
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 connected (normal left inverted right x axis y axis)
   1024x768       60.0  
   800x600        60.3     56.2  
   848x480        60.0  
   640x480        59.9

I did update few days back, but the problem appeared yesterday, after X crashed and I had to kill it from a tty. I want things to go back to how they were before that, but I can't think of any eg file that was corrupted by killing X and that caused that. Ask me for more info if necessary.