Hi Salvatore, I have some servers of this type and in the next weeks I will put two more in production. So I will try:
* Latest kernel from backports for bookworm.
* If fail, try lastest from unstable,
* If fail, try with upstream kernel.
Then we talk about bisect the upstream kernel with the previous
knowledge.
On Thu, Sep 18, 2025 at 07:43:53AM +0200, Salvatore Bonaccorso wrote:
> Control: tags -1 + moreinfo
>
> Hi Jose,
>
> On Mon, Dec 30, 2024 at 03:53:03PM +0000, Jose M Calhariz wrote:
> > Package: src:linux
> > Version: 6.11.10-1~bpo12+1
> > Severity: normal
> >
> > I found that this kernel fails to setup the video mode of the display
> > adapter, where a kernel 6.1 seams to work, on a server Dell PowerEdge
> > R660. The work around is to use mgag200.modeset=0. This machine is
> > to be used as a server, no graphics, X11 or Wayland, just text console
> > after a boot from UEFI. But I need iDRAC, BMC from dell or IPMI, to
> > sucessfully export the console of the machine to be managed when SSH
> > fails.
> >
> > I am open to do more tests or give more information as I understand an
> > R660 may not be available to the Debian Kernel Team.
>
> Is this something you still can reproduce with current kernels, so
> 6.12.43-1~bpo12+1?
>
> Can you easily take out the server for maintenance, and so do further
> experiments, assuming you can reproduce it with 6.12.43 based kernel,
> does 6.16.7-1 as well still expose the problem?
>
> If yes: Can you bisect the changes between 6.1 upstream and 6.11
> upstream to identify the commit which changes things for you? (do you
> need instructions on how to proceed on bisection?).
>
> Regards,
> Salvatore
>
Kind regards
Jose M Calhariz
--
--
As utopias sao, muitas vezes, verdades prematuras.
-- Lamartine
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