Bug reassigned. Updated package uploaded to Mentors. Verified to work on a Geode host.
Help for getting this cleared for Testing is welcome. debdiff attached. Thanks! Martin-Éric ma 17. toukok. 2021 klo 21.39 Martin-Éric Racine ([email protected]) kirjoitti: > > 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
diff -Nru xserver-xorg-video-geode-2.11.20/debian/changelog xserver-xorg-video-geode-2.11.20/debian/changelog --- xserver-xorg-video-geode-2.11.20/debian/changelog 2021-01-03 17:11:43.000000000 +0200 +++ xserver-xorg-video-geode-2.11.20/debian/changelog 2021-05-17 21:58:21.000000000 +0300 @@ -1,3 +1,18 @@ +xserver-xorg-video-geode (2.11.20-6) unstable; urgency=medium + + * Merged patch from Git (Closes: #822112): + 03_Mention-iomem-relaxed.patch + + Fixes a long-standing issue that prevents this legacy X driver from booting + with stock Linux kernels version 4 or newer. Merely adding a cmdline option + makes vesafb and legacy X drivers like this one coexist peacefully again. + + This short patch to the upstream README mentions iomem=relaxed as the fix. + + Thanks to Ben Hutchings for figuring this one out. + + -- Martin-Éric Racine <[email protected]> Mon, 17 May 2021 21:58:21 +0300 + xserver-xorg-video-geode (2.11.20-5) unstable; urgency=medium * [watch] diff -Nru xserver-xorg-video-geode-2.11.20/debian/patches/03_Mention-iomem-relaxed.patch xserver-xorg-video-geode-2.11.20/debian/patches/03_Mention-iomem-relaxed.patch --- xserver-xorg-video-geode-2.11.20/debian/patches/03_Mention-iomem-relaxed.patch 1970-01-01 02:00:00.000000000 +0200 +++ xserver-xorg-video-geode-2.11.20/debian/patches/03_Mention-iomem-relaxed.patch 2021-05-17 21:55:02.000000000 +0300 @@ -0,0 +1,37 @@ +From ae82f4b2746eb24295389f184bc18a9cb6c8f31c Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Martin-=C3=89ric=20Racine?= <[email protected]> +Date: Mon, 17 May 2021 21:50:23 +0300 +Subject: [PATCH] Mention iomem=relaxed in the README FAQ for Linux 4.x+ + requirements +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Thanks to Ben Hutchings for pointing out that vesafb and legacy X +drivers can peacefully coexist if iomem=relaxed gets added to the +Linux kernel cmdline options. + +Signed-off-by: Martin-Éric Racine <[email protected]> +--- + README | 5 ++++- + 1 file changed, 4 insertions(+), 1 deletion(-) + +diff --git a/README b/README +index e3ec6ee..111f9a6 100644 +--- a/README ++++ b/README +@@ -94,7 +94,10 @@ A: Since kernel 4.x Linux has strong memory protection. If the kernel is + + GRUB_GFXPAYLOAD_LINUX=text + +- Once this option has been added and the GRUB configuration refreshed, ++ Alternately, adding iomem=relaxed to GRUB_CMDLINE_LINUX_DEFAULT will ++ allow the video memory to be accessed by vesafb and the GEODE driver. ++ ++ Once either option has been added and the GRUB configuration refreshed, + the GEODE driver will launch on recent kernels as previously. + + Q: Why doesn't the GEODE driver work at WXGA (wide screen) resolutions? +-- +2.20.1 + diff -Nru xserver-xorg-video-geode-2.11.20/debian/patches/series xserver-xorg-video-geode-2.11.20/debian/patches/series --- xserver-xorg-video-geode-2.11.20/debian/patches/series 2020-12-15 20:27:27.000000000 +0200 +++ xserver-xorg-video-geode-2.11.20/debian/patches/series 2021-05-17 21:57:57.000000000 +0300 @@ -1,2 +1,3 @@ 01_fno-common.patch 02_Updated-the-README.patch +03_Mention-iomem-relaxed.patch
