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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