I just purchased an Acer Aspire V5-123 notebook with AMD processor and graphic and installed Debian 7.6 (stable) on it. first of all, I had to install a newer (3.14.0.bpo.1-amd64) kernel image to get the ethernet card working. Then, I got problem with Xorg not starting.
Here is the error lines from /var/log/Xorg.0.log:
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(EE) VESA(0): V_BIOS address 0x0 out of range
...
(EE) Screen(s) found, but none have a usable configuration.
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lspci -nn | grep VGA:
00:01.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Device [1002:9834]
I installed the libgl1-mesa-dri, xserver-xorg-video-ati, and firmware-linux-nonfree packages, as suggested by AtiHowTo from Debian Wiki, but the problem still persists and the last one (firmware-linux-nonfree) actually caused the notebook to freez on boot. so, I removed it.
I searched the net a lot, but couldn't find a solution. Any help is appreciated.
thanks,
Khosrow