Red Hat Bugzilla – Bug 1010253
GRUB should use efifb driver for graphic fallback
Last modified: 2015-06-29 08:25:00 EDT
Description of problem:
Since UEFI systems cannot rely on VESA driver, GOP (xdriver=fbdev) should be used instead for graphic fallback.
I have tested it on several UEFI machines and fbdev works on all of them, sometimes even better than VESA.
Correction - driver is not called fbdev, but efifb.
Mea culpa, I mistook fbdev for efifb even when I have tested it. Efifb driver doesn't work. But idea remains the same. Since UEFI machines cannot rely on VESA driver, grub should use efifb ideally (when it will work...).
You say "GRUB should use" ... but also talk about xdriver= .
Please clarify what it is that should change ... and in what way GRUB could change it.
I thought that what's default in kernel line is GRUB responsibility... My idea was to use xdriver=efifb instead of vesa on UEFI machines, but I am testing it now and it's kind of strange, it really doesn't work. I will do more testing.
Anyway, if grub isn't responsible for default values in kernel line (e. g. xdriver), what is?
Anaconda writes /etc/default/grub, it runs grub2-mkconfig which reads that and writes grub.cfg.
However, KMS and X should automatically figure out how to do the right thing. Adding configuration is the wrong solution.
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