Description of problem: When booting with -kernel the vga=0x318 (say) parameter is not being used. I'm not sure if this applies to other kernel parameters too. If I boot using a PXE rom and pxelinux with the same kernel parameters the VM boots and sets the correct VESA resolution. This is also the case in Fedora 10. Version-Release number of selected component (if applicable): [root@sys422 ~]# rpm -qa | grep qemu qemu-system-x86-0.10.4-3.fc11.x86_64 qemu-img-0.10.4-3.fc11.x86_64 qemu-common-0.10.4-3.fc11.x86_64 How reproducible: Always. Steps to Reproduce: 1. In a libvirt XML add "vga=0x318" to the cmdline 2. 3. Actual results: Resolution is not changed. Plymouth does not work (uses details.so instead). Expected results: As when booting from pxelinux the VESA resolution and colours should be changed. Additional info:
How do you know the parameter is ignored? We're currently facing regressions with vgabios, so this might be that the kernel _is_ parsing the argument correctly, but vgabios is broken and can't change that. If you really think arguments are ignored (i.e., other kinds of arguments are not working), then please provide more info. Otherwise, this is a duplicate of #499060
(In reply to comment #1) > How do you know the parameter is ignored? The console screen resolution is not changed to 1024x768 (vga=0x318) once the kernel begins. > We're currently facing regressions with vgabios, so this might be that the > kernel > _is_ parsing the argument correctly, but vgabios is broken and can't change > that. Okay. Could be related. > If you really think arguments are ignored (i.e., other kinds of arguments are > not working), then please provide more info. > > Otherwise, this is a duplicate of #499060 Maybe. Just to be clear, the vga kernel option works in a VM when the kernel and initrd are started from a PXE boot using pxelinux (and the virtio-net.rom). So the vgabios works as expected in that case. However when booting using -kernel/-intrd/cmdline the same option has no effect.
Daire: what does /proc/cmdline contain in the guest? does it have vga=0x318?
(In reply to comment #3) > Daire: what does /proc/cmdline contain in the guest? does it have vga=0x318? Yes. For both the direct (-kernel) and PXE boot cases the kernel reports that /proc/cmdline contains vga=0x318. It seems that using -kernel in qemu is not very well tested by the community at large as I keep finding these odd characteristics.
Ah, beautiful. vga= is implemented by the bootloader, not the kernel itself. Both grub and syslinux parse the param and passes it via the vid_mode kernel header field. Putting on F12VirtTarget, we're unlikely to implement this in an F-11 update.
Freaky, someone just posted an implementation to qemu-devel: http://lists.gnu.org/archive/html/qemu-devel/2009-05/msg01277.html
(In reply to comment #6) > Freaky, someone just posted an implementation to qemu-devel: > > http://lists.gnu.org/archive/html/qemu-devel/2009-05/msg01277.html FYI I have patched this into qemu-0.10.4-5.fc11 for testing and it seems to be working fine. The vga option is now correctly changing the mode. Daire
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
This bug appears to have been reported against 'rawhide' during the Fedora 13 development cycle. Changing version to '13'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
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