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Bug#1000481: upgrade-reports: Bullseye kernel hangs while initialising i915 gpu driver on old intel graphic chip

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Package: upgrade-reports
Severity: normal
X-Debbugs-Cc: letterbox@internix.de

My previous release is: Buster
I am upgrading to: Bullseye
Archive date: ?
Upgrade date: 2021-11-21
uname -a before upgrade: (kernel: linux-image-4.19.0-18-amd64 4.19.208-1)
uname -a after upgrade: Linux rappel 5.10.0-9-amd64 #1 SMP Debian 5.10.70-1 (2021-09-30) x86_64 GNU/Linux
Method: apt

Contents of /etc/apt/sources.list:
deb http://ftp.de.debian.org/debian/ bullseye main contrib non-free
deb-src http://ftp.de.debian.org/debian/ bullseye main
deb http://security.debian.org/debian-security bullseye-security main contrib non-free
deb-src http://security.debian.org/debian-security bullseye-security main
deb http://ftp.de.debian.org/debian/ bullseye-updates main contrib non-free
deb-src http://ftp.de.debian.org/debian/ bullseye-updates main

Further Comments/Problems:
The update went fine without errors. But booting with the new kernel did
not work. The display went black shortly after loading the new kernel. I
think it was the moment when it normally changes the display resolution.
The boot process did not continue. Keyboard and mouse were not functioning.
I had to hard switch off the computer. There were no logs written to disk.
Fortunately my old kernel linux-image-4.19.0-18-amd64 was still able to
boot.

I solved the problem by inserting a boot parameter "intel_iommu=off" to
grub. With this parameter the kernel from bullseye
linux-image-5.10.0-9-amd64 was able to boot properly and the graphic was
fine on console and with x. The kernel from buster did not need this
boot parameter.

I think the problem is, that the i915 gpu driver has difficulties to
initialise my old intel graphic chip. According to lspci it is:

00:02.0 VGA compatible controller: Intel Corporation 82Q35 Express Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller])
        Subsystem: Fujitsu Technology Solutions 82Q35 Express Integrated Graphics Controller
        Flags: bus master, fast devsel, latency 0, IRQ 16
        Memory at f0200000 (32-bit, non-prefetchable) [size=512K]
        I/O ports at 1c70 [size=8]
        Memory at e0000000 (32-bit, prefetchable) [size=256M]
        Memory at f0000000 (32-bit, non-prefetchable) [size=1M]
        Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: i915
        Kernel modules: i915

I hope this report will be useful to other people trying to run the
bullseye kernel on old intel hardware.

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Thread

Bug#1000481: upgrade-reports: Bullseye kernel hangs while initialising i915 gpu driver on old intel graphic chip Ben Mueller <letterbox@internix.de> - 2021-11-23 23:00 +0100
  Bug#1000481: upgrade-reports: Bullseye kernel hangs while initialising i915 gpu driver on old intel graphic chip Paul Gevers <elbrus@debian.org> - 2021-12-23 21:10 +0100
    Bug#1000481: upgrade-reports: Bullseye kernel hangs while initialising i915 gpu driver on old intel graphic chip Ben Mueller <letterbox@internix.de> - 2021-12-24 00:00 +0100
      Bug#1000481: upgrade-reports: Bullseye kernel hangs while initialising i915 gpu driver on old intel graphic chip Paul Gevers <elbrus@debian.org> - 2021-12-24 07:40 +0100
  Processed: Re: Bug#1000481: upgrade-reports: Bullseye kernel  hangs while initialising i915 gpu driver on old intel graphic chip "Debian Bug Tracking System" <owner@bugs.debian.org> - 2021-12-24 07:40 +0100

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