| Newsgroups |
gmane.linux.lfs.book |
| Message-ID |
<[email protected]> |
This is an automated email from the git hooks/post-receive script.
git pushed a commit to branch trunk
in repository lfs.
commit fdf21dccbab633957d3f46ce79f6f037f51229ad
Author: Xi Ruoyao <[email protected]>
AuthorDate: Wed Oct 30 19:38:59 2024 +0800
drm-panic: kernel: Enable SimpleDRM
Currently on a LFS system booted via legacy BIOS (intead of UEFI), the
users can make two different configurations:
1. The DRM driver for the GPU is built as a module. Then before the
module is loaded (i.e. the root fs is properly mounted) the kernel
messages are displayed via the VGA console.
2. The DRM driver for the GPU is built into the kernel image. Then the
kernel messages are displayed via the DRM-emulated framebuffer
console since a very early stage (before the root fs is properly
mounted).
When the system is booted via UEFI, we use SimpleDRM on the EFI
framebuffer for displaying kernel messages, thus it's always the case 2.
Both are not good for diagnostic in case the root fs cannot be mounted
properly (it's very frequent on lfs-support):
- With 1 the VGA console can only fit 80x24 characters, so the relevent
information is often flushed away.
- With 2 the panic message is often displayed improperly when a DRM
driver is running.
The "DRM panic" feature introduced since Linux 6.11 (but it'll only
become usable for LFS since Linux 6.12) can fix the case 2, while case
1 just cannot be fixed. So start to make LFS booted via legacy BIOS
to use method 2 now, then we can enable DRM panic and fix this
long-standing issue.
---
chapter10/kernel.xml | 4 ++--
chapter10/kernel/kernel.version | 2 +-
chapter10/kernel/systemd.toml | 14 +++++---------
chapter10/kernel/systemd.xml | 10 +++++-----
chapter10/kernel/sysv.toml | 14 +++++---------
chapter10/kernel/sysv.xml | 11 ++++++-----
6 files changed, 24 insertions(+), 31 deletions(-)
diff --git a/chapter10/kernel.xml b/chapter10/kernel.xml
index 4eb87a17b..8155f735c 100644
--- a/chapter10/kernel.xml
+++ b/chapter10/kernel.xml
@@ -282,8 +282,8 @@
<listitem>
<para>These are needed to display the Linux console on a
GPU driven by a DRI (Direct Rendering Infrastructure) driver.
- If <option>CONFIG_DRM</option> (Direct Rendering Manager) is
- enabled, you should enable these two options as well or you'll see
+ As <option>CONFIG_DRM</option> (Direct Rendering Manager) is
+ enabled, we should enable these two options as well or we'll see
a blank screen once the DRI driver is loaded.</para>
</listitem>
</varlistentry>
diff --git a/chapter10/kernel/kernel.version b/chapter10/kernel/kernel.version
index 22cb9e553..ff61e1868 100644
--- a/chapter10/kernel/kernel.version
+++ b/chapter10/kernel/kernel.version
@@ -1 +1 @@
-6.10.2
+6.12.1
diff --git a/chapter10/kernel/systemd.toml b/chapter10/kernel/systemd.toml
index bfe7a1b40..649df88d4 100644
--- a/chapter10/kernel/systemd.toml
+++ b/chapter10/kernel/systemd.toml
@@ -13,7 +13,11 @@ STACKPROTECTOR_STRONG='*'
UEVENT_HELPER=' '
DEVTMPFS='*'
DEVTMPFS_MOUNT='*'
-DRM=' *M'
+SYSFB_SIMPLEFB='*'
+DRM='*'
+DRM_FBDEV_EMULATION='*'
+DRM_SIMPLEDRM='*'
+FRAMEBUFFER_CONSOLE='*'
NET='*'
INET='*'
IPV6='*'
@@ -30,11 +34,3 @@ revision='systemd'
[RT_GROUP_SCHED]
value = ' '
comment = 'This may cause some systemd features malfunction'
-
-[DRM_FBDEV_EMULATION]
-value = ' *'
-comment = 'If [DRM] is selected as * or M, this must be selected'
-
-[FRAMEBUFFER_CONSOLE]
-value = ' *'
-comment = 'If [DRM] is selected as * or M, this must be selected'
diff --git a/chapter10/kernel/systemd.xml b/chapter10/kernel/systemd.xml
index a03c67402..beff1eb2d 100644
--- a/chapter10/kernel/systemd.xml
+++ b/chapter10/kernel/systemd.xml
@@ -42,15 +42,15 @@
... [FW_LOADER_USER_HELPER]
<emphasis role='blue'>F</emphasis>irmware Drivers --->
[*] <emphasis role='blue'>E</emphasis>xport DMI identification via sysfs to userspace [DMIID]
+ [*] M<emphasis role='blue'>a</emphasis>rk VGA/VBE/EFI FB as generic system framebuffer [SYSFB_SIMPLEFB]
<emphasis role='blue'>G</emphasis>raphics support --->
- < /*/M> <emphasis role='blue'>D</emphasis>irect Rendering Manager (XFree86 4.1.0 and higher DRI support) --->
+ <*> <emphasis role='blue'>D</emphasis>irect Rendering Manager (XFree86 4.1.0 and higher DRI support) --->
... [DRM]
- # If [DRM] is selected as * or M, this must be selected:
- [ /*] <emphasis role='blue'>E</emphasis>nable legacy fbdev support for your modesetting driver
+ [*] <emphasis role='blue'>E</emphasis>nable legacy fbdev support for your modesetting driver
... [DRM_FBDEV_EMULATION]
+ <*> <emphasis role='blue'>S</emphasis>imple framebuffer driver [DRM_SIMPLEDRM]
<emphasis role='blue'>C</emphasis>onsole display driver support --->
- # If [DRM] is selected as * or M, this must be selected:
- [ /*] <emphasis role='blue'>F</emphasis>ramebuffer Console support [FRAMEBUFFER_CONSOLE]
+ [*] <emphasis role='blue'>F</emphasis>ramebuffer Console support [FRAMEBUFFER_CONSOLE]
<emphasis role='blue'>F</emphasis>ile systems --->
[*] <emphasis role='blue'>I</emphasis>notify support for userspace [INOTIFY_USER]
diff --git a/chapter10/kernel/sysv.toml b/chapter10/kernel/sysv.toml
index 3f8d2e93c..5f6812821 100644
--- a/chapter10/kernel/sysv.toml
+++ b/chapter10/kernel/sysv.toml
@@ -12,14 +12,10 @@ STACKPROTECTOR_STRONG='*'
UEVENT_HELPER=' '
DEVTMPFS='*'
DEVTMPFS_MOUNT='*'
-DRM=' *M'
+SYSFB_SIMPLEFB='*'
+DRM='*'
+DRM_FBDEV_EMULATION='*'
+DRM_SIMPLEDRM='*'
+FRAMEBUFFER_CONSOLE='*'
revision='sysv'
-
-[DRM_FBDEV_EMULATION]
-value = ' *'
-comment = 'If [DRM] is selected as * or M, this must be selected'
-
-[FRAMEBUFFER_CONSOLE]
-value = ' *'
-comment = 'If [DRM] is selected as * or M, this must be selected'
diff --git a/chapter10/kernel/sysv.xml b/chapter10/kernel/sysv.xml
index 451898a21..0c1d05e5a 100644
--- a/chapter10/kernel/sysv.xml
+++ b/chapter10/kernel/sysv.xml
@@ -28,12 +28,13 @@
[*] M<emphasis role='blue'>a</emphasis>intain a devtmpfs filesystem to mount at /dev [DEVTMPFS]
[*] <emphasis role='blue'>A</emphasis>utomount devtmpfs at /dev, after the kernel mounted the rootfs
... [DEVTMPFS_MOUNT]
+ <emphasis role='blue'>F</emphasis>irmware Drivers --->
+ [*] M<emphasis role='blue'>a</emphasis>rk VGA/VBE/EFI FB as generic system framebuffer [SYSFB_SIMPLEFB]
<emphasis role='blue'>G</emphasis>raphics support --->
- < /*/M> <emphasis role='blue'>D</emphasis>irect Rendering Manager (XFree86 4.1.0 and higher DRI support) --->
+ <*> <emphasis role='blue'>D</emphasis>irect Rendering Manager (XFree86 4.1.0 and higher DRI support) --->
... [DRM]
- # If [DRM] is selected as * or M, this must be selected:
- [ /*] <emphasis role='blue'>E</emphasis>nable legacy fbdev support for your modesetting driver
+ [*] <emphasis role='blue'>E</emphasis>nable legacy fbdev support for your modesetting driver
... [DRM_FBDEV_EMULATION]
+ <*> <emphasis role='blue'>S</emphasis>imple framebuffer driver [DRM_SIMPLEDRM]
<emphasis role='blue'>C</emphasis>onsole display driver support --->
- # If [DRM] is selected as * or M, this must be selected:
- [ /*] <emphasis role='blue'>F</emphasis>ramebuffer Console support [FRAMEBUFFER_CONSOLE]</screen>
+ [*] <emphasis role='blue'>F</emphasis>ramebuffer Console support [FRAMEBUFFER_CONSOLE]</screen>
--
To stop receiving notification emails like this one, please contact
the administrator of this repository.
--
http://lists.linuxfromscratch.org/sympa/info/lfs-book
Unsubscribe: See the above information page