ma 17. toukok. 2021 klo 21.13 Ben Hutchings ([email protected]) kirjoitti: > > On Mon, 2021-05-17 at 20:01 +0200, Ben Hutchings wrote: > > Control: tag -1 wontfix > > > > On Wed, 2021-05-12 at 06:16 +0300, Martin-Éric Racine wrote: > > > This still applies to current kernels. > > > > > > The problem seems to be that kernels after version 3 implement a > > > memory protection scheme that prevents the framebuffer from being > > > accessed by both vesafb and X drivers. The Geode X driver does that. > > > > Then this is not a kernel bug. The change was intentional and > > documented in the NEWS file along with the option to revert it: > > > > - On most architectures, the /dev/mem device can no longer be used to > > access devices that also have a kernel driver. This breaks dosemu > > and some old user-space graphics drivers. To allow this, set the > > kernel parameter: iomem=relaxed > > That said, this was originally reported before that change was made, so > possibly there are two different issues here. Let us know if the > kernel parameter change doesn't allow the X driver to work again.
Using this cmdline parameter indeed restores X driver operation. Feel free to reassign. I'll prepare a small patch to the Geode driver's own README to mention this and upload the result to unstable. Thanks for pointing out the fix. Cheers! Martin-Éric
