On Sun, 2011-09-11 at 10:08 +0200, Ralf Denzer wrote: > Package: linux-2.6 > Version: 3.0.0-3 > Severity: normal > > Hello, > > I freshly installed wheezy with kernel linux 3.0.0-1-amd64 on my > Lenovo Thinkpad T400. > During boot, after the message "Waiting for /dev being fully populated" > is displayed, my screen turns first into flickery white lines > in the upper third of my screen and then (I bet after switching > to graphic mode) the screen is fully black. I tried several boot options > like "fb=false" and/or "vga= ..." with several modes but this didn't > helped.
The correct option for disabling Kernel Mode Setting (KMS) would be 'nomodeset'. > But my computer is running without screen because I can > remotely log in using ssh. Luckily, I installed the ssh-server during > installation. > During the boot of the installation CD-ROM I had no problems. > > Now, strange thing: I was playing a bit around after remote log in > and it turned out, that after installing the package > "firmware-linux-nonfree" > from the non-free section, booting now works fine. I.e., I see all boot > messages, > it switches to framebuffer mode and also switching to graphical mode at > the end of the boot sequence works. Thus I can work with my laptop again. > > Btw., I verified by another fresh installation, that I only need the > additional > package "firmware-linux-nonfree" from non-free. [...] Radeon graphics chips seem to have become more and more dependent on GPU firmware. The driver will run without firmware available, and this works with older cards where firmware was only needed for 3D acceleration, but apparently this is not true for newer chips. Perhaps the driver should abort initialisation when firmware is not available for one of these. Ben. -- Ben Hutchings Beware of programmers who carry screwdrivers. - Leonard Brandwein
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