On Fri, 2012-09-07 at 19:37 +0800, Steven Shiau wrote: > Source: linux > Version: 3.2.23-1 > Severity: important > > Dear Maintainer, > > When using "nomodeset" and "vga=788" in the boot parameters, the machine hang at > "fb: conflicting fb hw usage inteldrmfb vs VESA VGA - removing generic driver" > on a machine with Intel VGA card. > This happens no matter it's 686-pae kernel, or i486 one. > Since the Intel VGA card in very common, please consider to make framebuffer work for KMS disabled. DRM drivers with KMS *are* framebuffer drivers. I think you mean 'keep VGA console working'. > How to reproduce this: > 1. Create a Debian live based on Sid: > http://live-build.debian.net/cgi-bin/live-build > 2. Burn the created iso on a CD, then boot it on a machine with Intel VGA card > 3. In the 1st boot menu of isolinux, press "Tab" key to modify the boot parameters. Just append "nomodeset vga=788", then press enter to continue boot > 4. The above error will shown, and it just hangs there. This is really weird because i915 just shouldn't register a console at all if you do that... Ah, but xserver-video-xorg-intel still installs a configuration file which *overrides* nomodeset (/etc/modprobe.d/i915-kms.conf). (There was a very good reason for doing that in squeeze, but I think it can be dropped now.) So you could avoid installing xserver-video-xorg-intel, or empty the configuration file. Still, the kernel should be able to switch without hanging (and normally does). Does this *only* happen if you use 'nomodeset vga=788' or does it also happen if you use 'vga=788'? Ben. -- Ben Hutchings Experience is what causes a person to make new mistakes instead of old ones.
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