Re: Debian 11 freezes on Dell Latitude e6520

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Wow! Thanks a lot to David and to you Andy!

Yes, all that is right about the graphic cards. So far, I never had a
problem with the installers (but never used the standard ones,
actually) I will check whenever possible, but I sort of remember to
have disable at some point the Optimus switch on the BIOS. If so, the
Intel card should be disabled.=20

Anyway, you give me some work to do :-) I'll try that as soon as
possible.

All the best,

   mol



El Mon, 27 Dec 2021 07:28:02 +0000
"Andrew M.A. Cater" <[email protected]> escribi=C3=B3:

> Thanks to David Christensen over on debian-user mailing list:
>=20
> Your E6520 is a hybrid laptop with two chipsets: one Intel graphics,
> one Nvidia. On battery power, it will use the Intel, when plugged in
> to higher resolution displays or whatever, it will use the Nvidia.
>=20
> This is also similar to high end gaming laptops.
>=20
> With the standard install, it's occasionally possible that conflict
> between which display chipset to use / nouveau drivers may mean
> lock-ups.
>=20
> There are three solutions possible, I think [I no longer have one of
> these to deal with]
>=20
> 1. Ignore the Nvidia and use the Intel driver only. This will probably
> work to some extent. It may be necessary to deny list the Nvidia
> drivers
>=20
> 2. Ignore the Intel and use the Nvidia drivers only - probably the
> non-free drivers
>=20
> 3. Use the Optimus drivers which will allow the laptop to switch
> between chipsets. This is provided by the bumblebee package in Debian
> - and there are two types: one is a fully free driver and links in
> with nouveau, one relies on the Nvidia proprietary drivers.
>=20
> In my limited experience:
>=20
> It is easiest to start with an expert text mode  install and
> explicitly uncheck/deselect the graphics drivers as you go: uncheck
> Debian graphical environment and Gnome.
> Install only the standard packages and minimal drivers - command line
> only.
>=20
> Install build-essential and dkms packages and also choose which
> bumblebee package to use and add it.
>=20
> If you choose to use the proprietary drivers - build them at this
> point with no major graphics drivers loaded. The proprietary drivers
> will taint the kernel. dkms - if properly installed - should build
> the necessary kernel drivers with each kernel change.
>=20
> At that point, everything should work on the command line.
>=20
> After that, reboot and as root/sudo equivalent, use the tasksel
> command to install a desktop environment. This _should_ allow
> everything to work correctly.=20
>=20
> Hope this helps. With every good wish, as ever,
>=20
> Andy Cater
>=20

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