Bug#822575: linux-4.1: UEFI root-fb vs. cirrusfb
Hello David,
Am 15.11.2016 um 15:57 schrieb David Herrmann:
> On Fri, Oct 28, 2016 at 2:24 PM, Philipp Hahn <hahn@univention.de> wrote:
>> while experimenting with UEFI and secure-boot I stumbled into the issue
>> "cirrusdrmfb broken with simplefb" associated with your name:
>> <https://groups.google.com/forum/#!msg/linux.kernel/tD2UEqra-wU/u6NkZY8o5YEJ>
>>
>> I'm using a Debian based linux-4.1.38 kernel, which has
>>> # zgrep -E 'CONFIG_X86_SYSFB|CONFIG_FB_SIMPLE' /boot/config-`uname -r`
>>> CONFIG_X86_SYSFB=y
>>> CONFIG_FB_SIMPLE=y
>>
>> I found that SUSE bug
>> <https://bugzilla.novell.com/show_bug.cgi?id=855821>, where Takashi Iwai
>> finally disabled those options.
>>
>> I also checked Debians latest linux-4.7 kernel in Debian-sid, which
>> still has this setting. So my questions are:
>> 1, should Debian disable those options for x86?
>> 2. What would Debian loose?
>> 3. or is that issue fixed otherwise in newer kernels?
>
> Right now CONFIG_X86_SYSFB should remain disabled. Once the SimpleDRM
> driver is upstream, there will be infrastructure to do the hw
> handover. Right now, it breaks if you hand over hw from one driver to
> another.
@David: Thank you for your feedback.
@Debian: Please disable CONFIG_X86_SYSFB in Debian for all next builds -
maybe except arch=arm.
Philipp Hahn
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