Re: Problema com kernel 6.16.3 no Debian testing: driv er i915 não carrega (regressão?)

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Gunther, boa noite!

Amigo, talvez isso n=C3=A3o resolva teu problema, mas bateu uma leve curiosi=
dade=E2=80=A6

1- O pacote =E2=80=9Cxserver-xorg-video-intel=E2=80=9D est=C3=A1 instalado? S=
e estiver, desinstale ele=E2=80=A6 A pr=C3=B3pria descri=C3=A7=C3=A3o do pac=
ote informa =E2=80=9Cdesencorajar=E2=80=9D o uso dele. Apesar de n=C3=A3o se=
r necess=C3=A1rio, pode ser valido instalar o =E2=80=9Cfirmware-intel-graphi=
cs=E2=80=9D. Depois diga se funciona=E2=80=A6

2- Porque instalou o kernel =E2=80=9Crt=E2=80=9D=E2=80=A6?



Procurando pelo =E2=80=9CDRM_I915=E2=80=9D no rep do Debian, informa que ele=
 foi compilado no =E2=80=9Clinux-headers-6.12.38+deb13-rt-amd64=E2=80=9D (ve=
rs=C3=A3o anterior do kernel dispon=C3=ADvel no Trixie), mas n=C3=A3o foi co=
mplicado para o 6.16 do kernel =E2=80=9Crt=E2=80=9D atual do Forky. Unico qu=
e aparenta possuir o =E2=80=9CDRM_I915=E2=80=9D =C3=A9 o =E2=80=9Clinux-head=
ers-6.16.3+deb14-amd64=E2=80=9D.

Espero que isso te ajude de alguma forma.





Best,


> Em 1 de set. de 2025, =C3=A0(s) 10:03, Lucas Castro <[email protected]=
r> escreveu:
>=20
> =EF=BB=BFOl=C3=A1,
>=20
> Verificando no reposit=C3=B3rio salsa do Debian,
>=20
> na vers=C3=A3o que citou, tem retorno.
>=20
>> On 31/08/2025 22:25, Gunther Furtado wrote:
>> Ol=C3=A1 pessoal,
>>=20
>> Espero que todos estejam bem.
>>=20
>> Estou com um problema significativo com o kernel 6.16.3 no Debian testing=
, e que ap=C3=B3s uma breve investiga=C3=A7=C3=A3o de domingo, acho que pode=
 ser uma **regress=C3=A3o na configura=C3=A7=C3=A3o do pacote**.
>=20
> grep DRM_I915 debian/config/config debian/config/amd64/config
>=20
> debian/config/config:CONFIG_DRM_I915_CAPTURE_ERROR=3Dy
> debian/config/config:CONFIG_DRM_I915_COMPRESS_ERROR=3Dy
> debian/config/config:CONFIG_DRM_I915_USERPTR=3Dy
> debian/config/config:# CONFIG_DRM_I915_WERROR is not set
> debian/config/config:# CONFIG_DRM_I915_DEBUG is not set
> debian/config/config:# CONFIG_DRM_I915_SW_FENCE_DEBUG_OBJECTS is not set
> debian/config/config:# CONFIG_DRM_I915_SW_FENCE_CHECK_DAG is not set
> debian/config/config:# CONFIG_DRM_I915_DEBUG_GUC is not set
> debian/config/config:# CONFIG_DRM_I915_SELFTEST is not set
> debian/config/config:# CONFIG_DRM_I915_LOW_LEVEL_TRACEPOINTS is not set
> debian/config/config:# CONFIG_DRM_I915_DEBUG_VBLANK_EVADE is not set
> debian/config/amd64/config:CONFIG_DRM_I915_GVT_KVMGT=3Dm
> debian/config/amd64/config:CONFIG_DRM_I915_PXP=3Dy
>=20
>=20
>>=20
>>=20
>> ## Problema:
>> - **Kernel 6.16.3** (tanto do reposit=C3=B3rio testing quanto compilado m=
anualmente a partir do `linux-source-6.16.3`) **n=C3=A3o inicializa o driver=
 i915** da Intel
>> - **Resultado:** Apenas a tela interna do notebook funciona via `efifb`, m=
as as sa=C3=ADdas HDMI e VGA ficam inativas e o driver n=C3=A3o carrega
>> - **Hardware afetado:** Notebook Lenovo com Intel HD Graphics 520 (Skylak=
e)
>>=20
>> ## Investiga=C3=A7=C3=A3o realizada:
>> 1. **Compara=C3=A7=C3=A3o de configura=C3=A7=C3=B5es:** Descobri que o ar=
quivo `.config` do pacote `linux-source-6.16.3` **n=C3=A3o cont=C3=A9m as co=
nfigura=C3=A7=C3=B5es do DRM_I915**
>> 2. **Confirma=C3=A7=C3=A3o:** O kernel 6.12.38 funcional tem `CONFIG_DRM_=
I915=3Dm` e todas suas depend=C3=AAncias
>> 3. **Tentativa de corre=C3=A7=C3=A3o:** Ao adicionar manualmente `CONFIG_=
DRM_I915=3Dy` ao `.config`, o `make` parece ignorar/sobrescrever estas confi=
gura=C3=A7=C3=B5es durante a compila=C3=A7=C3=A3o
>>=20
>> ## Evid=C3=AAncias:
>> ```bash
>> # Kernel 6.12 (funcional):
>> $ grep CONFIG_DRM_I915 /boot/config-6.12.38+deb13-rt-amd64
>> CONFIG_DRM_I915=3Dm
>> CONFIG_DRM_I915_FORCE_PROBE=3D""
>> [... m=C3=BAltiplas configura=C3=A7=C3=B5es i915 ...]
>>=20
>> # Kernel 6.16.3 (problem=C3=A1tico):
>> $ grep CONFIG_DRM_I915 ../linux-source-6.16/.config
>> # RETORNO VAZIO - as configura=C3=A7=C3=B5es n=C3=A3o existem!
>> ```
>>=20
>> ## Impacto:
>> - Notebooks com GPU Intel podem ficar com v=C3=ADdeo limitado =C3=A0 tela=
 interna
>> - Perda de funcionalidade de m=C3=BAltiplos monitores
>>=20
>> ## Solicita=C3=A7=C3=A3o:
>> Gostaria de saber se mais algu=C3=A9m est=C3=A1 enfrentando este problema=
.
> Verifica o carregamento do m=C3=B3dulo no dmesg e driver que est=C3=A1 sen=
do utilizado pela placa no lspci.
>>=20
>> Atenciosamente,
>>=20
>> Gunther Furtado
>>=20
>=20
> Atenciosamente,
>=20
> Lucas Castro.
>=20

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