On 2 laptops (Dell M4400 and M4500) which have a VGA port, a Maxim MX11-LCD15 TV with a VGA port stopped working, also I tried another Panasonic TX-26LXD500 TV using VGA today and it's the same. (Using HDMI to the Panasonic from a Dell E7470 in a brief test with a current kernel it had an outsized picture, the edges were offscreen, but that might be something different, I haven't investigated that at all.) These are older TV's, from the 2000's, I guess the EDID might not be entirely compliant with modern standards.
The 6.1.12-artix1-1 kernel works, later ones don't - 6.2.2-artix1-1 and also Arch ones 6.2.1-arch1-1 and 6.2.0-arch1-1.
A newish AEC monitor (not TV) did work with the latest kernels via VGA though so this is not all VGA, just some, and it isn't the output from the Dell laptops being blocked. In the newer kernels there is simply no monitor detected at all, it doesn't appear.
As this problem now seems reasonably widespread in effect and not just one weird old TV / monitor issue (but two!) it seems worth a mention, although it's most likely more of a kernel problem than an Artix one. I hadn't noticed this until recently as I don't often connect monitors to my laptops.
I found this suggestion searching about:
https://askubuntu.com/questions/1481695/after-latest-linux-kernel-6-2-update-monitor-is-black-does-not-recognize-signal (https://askubuntu.com/questions/1481695/after-latest-linux-kernel-6-2-update-monitor-is-black-does-not-recognize-signal)
But that doesn't seem to be it. I tried evdi from omniverse, evdi from the AUR (which is currently newer than omniverse), evdi-compat-git and evdi-git. Then I tried ddcci-driver-linux-dkms which is some other monitor driver from the AUR but none of those seemed to help.
I found the commit where this started, but it's a big one and might require further refinement somehow:
commit a594533df0f6ca391da003f43d53b336a2d23ffa (HEAD)
Merge: cdb9d3537711 66efff515a65
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Tue Dec 13 11:59:58 2022 -0800
Merge tag 'drm-next-2022-12-13' of git://anongit.freedesktop.org/drm/drm
Pull drm updates from Dave Airlie:
"The biggest highlight is that the accel subsystem framework is merged.
Hopefully for 6.3 we will be able to line up a driver to use it.
In drivers land, i915 enables DG2 support by default now, and nouveau
has a big stability refactoring and initial ampere support, AMD
includes new hw IP support and should build on ARM again. There is
also an ofdrm driver to take over offb on platforms it's used.
Stuff outside my tree, the dma-buf patches hit a few places, the vc4
firmware changes also do, and i915 has some interactions with MEI for
discrete GPUs. I think all of those should have been acked/reviewed by
relevant parties.
New driver:
- ofdrm - replacement for offb
fbdev:
- add support for nomodeset
fourcc:
- add Vivante tiled modifier
core:
- atomic-helpers: CRTC primary plane test fixes, fb access hooks
- connector: TV API consistency, cmdline parser improvements
- send connector hotplug on cleanup
- sort makefile objects
tests:
- sort kunit tests
- improve DP-MST tests
- add kunit helpers to create a device
sched:
- module param for scheduling policy
- refcounting fix
buddy:
- add back random seed log
ttm:
- convert ttm_resource to size_t
- optimize pool allocations
edid:
- HFVSDB parsing support fixes
- logging/debug improvements
- DSC quirks
dma-buf:
- Add unlocked vmap and attachment mapping
- move drivers to common locking convention
- locking improvements
firmware:
- new API for rPI firmware and vc4
xilinx:
- zynqmp: displayport bridge support
- dpsub fix
bridge:
- adv7533: Remove dynamic lane switching
- it6505: Runtime PM support, sync improvements
- ps8640: Handle AUX defer messages
- tc358775: Drop soft-reset over I2C
panel:
- panel-edp: Add INX N116BGE-EA2 C2 and C4 support.
- Jadard JD9365DA-H3
- NewVision NV3051D
amdgpu:
- DCN support on ARM
- DCN 2.1 secure display
- Sienna Cichlid mode2 reset fixes
- new GC 11.x firmware versions
- drop AMD specific DSC workarounds in favour of drm code
- clang warning fixes
- scheduler rework
- SR-IOV fixes
- GPUVM locking fixes
- fix memory leak in CS IOCTL error path
- flexible array updates
- enable new GC/PSP/SMU/NBIO IP
- GFX preemption support for gfx9
amdkfd:
- cache size fixes
- userptr fixes
- enable cooperative launch on gfx 10.3
- enable GC 11.0.4 KFD support
radeon:
- replace kmap with kmap_local_page
- ACPI ref count fix
- HDA audio notifier support
i915:
- DG2 enabled by default
- MTL enablement work
- hotplug refactoring
- VBT improvements
- Display and watermark refactoring
- ADL-P workaround
- temp disable runtime_pm for discrete-
- fix for A380 as a secondary GPU
- Wa_18017747507 for DG2
- CS timestamp support fixes for gen5 and earlier
- never purge busy TTM objects
- use i915_sg_dma_sizes for all backends
- demote GuC kernel contexts to normal priority
- gvt: refactor for new MDEV interface
- enable DC power states on eDP ports
- fix gen 2/3 workarounds
nouveau:
- fix page fault handling
- Ampere acceleration support
- driver stability improvements
- nva3 backlight support
msm:
- MSM_INFO_GET_FLAGS support
- DPU: XR30 and P010 image formats
- Qualcomm SM6115 support
- DSI PHY support for QCM2290
- HDMI: refactored dev init path
- remove exclusive-fence hack
- fix speed-bin detection
- enable clamp to idle on 7c3
- improved hangcheck detection
vmwgfx:
- fb and cursor refactoring
- convert to generic hashtable
- cursor improvements
etnaviv:
- hw workarounds
- softpin MMU fixes
ast:
- atomic gamma LUT support
- convert to SHMEM
lcdif:
- support YUV planes
- Increase DMA burst size
- FIFO threshold tuning
meson:
- fix return type of cvbs mode_valid
mgag200:
- fix PLL setup on some revisions
sun4i:
- A100 and D1 support
udl:
- modesetting improvements
- hot unplug support
vc4:
- support PAL-M
- fix regression preventing 4K @ 60Hz
- fix NULL ptr deref
v3d:
- switch to drm managed resources
renesas:
- RZ/G2L DSI support
- DU Kconfig cleanup
mediatek:
- fixup dpi and hdmi
- MT8188 dpi support
- MT8195 AFBC support
tegra:
- NVDEC hardware on Tegra234 SoC
hdlcd:
- switch to drm managed resources
ingenic:
- fix registration error path
hisilicon:
- convert to drm_mode_init
maildp:
- use managed resources
mtk:
- use drm_mode_init
rockchip:
udl:
- modesetting improvements
- hot unplug support
vc4:
- support PAL-M
- fix regression preventing 4K @ 60Hz
- fix NULL ptr deref
v3d:
- switch to drm managed resources
renesas:
- RZ/G2L DSI support
- DU Kconfig cleanup
mediatek:
- fixup dpi and hdmi
- MT8188 dpi support
- MT8195 AFBC support
tegra:
- NVDEC hardware on Tegra234 SoC
hdlcd:
- switch to drm managed resources
ingenic:
- fix registration error path
hisilicon:
- convert to drm_mode_init
maildp:
- use managed resources
mtk:
- use drm_mode_init
rockchip:
- use drm_mode_copy"
* tag 'drm-next-2022-12-13' of git://anongit.freedesktop.org/drm/drm: (1397 commits)
drm/amdgpu: fix mmhub register base coding error
drm/amdgpu: add tmz support for GC IP v11.0.4
drm/amdgpu: enable GFX Clock Gating control for GC IP v11.0.4
drm/amdgpu: enable GFX Power Gating for GC IP v11.0.4
drm/amdgpu: enable GFX IP v11.0.4 CG support
drm/amdgpu: Make amdgpu_ring_mux functions as static
drm/amdgpu: generally allow over-commit during BO allocation
drm/amd/display: fix array index out of bound error in DCN32 DML
drm/amd/display: 3.2.215
drm/amd/display: set optimized required for comp buf changes
drm/amd/display: Add debug option to skip PSR CRTC disable
drm/amd/display: correct DML calc error of UrgentLatency
drm/amd/display: correct static_screen_event_mask
drm/amd/display: Ensure commit_streams returns the DC return code
drm/amd/display: read invalid ddc pin status cause engine busy
drm/amd/display: Bypass DET swath fill check for max clocks
drm/amd/display: Disable uclk pstate for subvp pipes
drm/amd/display: Fix DCN2.1 default DSC clocks
drm/amd/display: Enable dp_hdmi21_pcon support
drm/amd/display: prevent seamless boot on displays that don't have the preferred dig
...
In the https://aur.archlinux.org/packages/linux-drm-next-git (https://aur.archlinux.org/packages/linux-drm-next-git) kernel tree it is looking like this commit, which is also a merge of several commits, which moves things a bit closer:
commit b2268e26869a56e40964f0d912b58ffd076fd453 (HEAD)
Merge: 077bd80083ab 7d579eff3e55
Author: Dave Airlie <airlied@redhat.com>
Date: Fri Dec 9 10:29:56 2022 +1000
Merge tag 'drm-intel-next-fixes-2022-12-01' of git://anongit.freedesktop.org/drm/drm-intel into drm-next
- Multi-cast register fix (Matt)
- Fix workarounds on gen2-3 (Tvrtko)
- Bigjoiner fix (Ville)
- Make Guc default_list a const data (Jani)
- Acquire forcewake before uncore read (Umesh)
- Selftest fix (Umesh)
- HuC related fixes (Daniele)
- Fix some incorrect return values (Janusz)
- Fix a memory leak in bios related code (Xia)
- Fix VBT send packet port selection (Mikko)
- DG2's DMC fix bump for Register noclaims and few restore (Gustavo)
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Y4jZBRw9KvlKgkr6@intel.com
I modified the linux-drm-next-git PKGBUILD to build this linux-drm-intel-git source instead, interestingly unlike other kernel builds it output very few messages during the process except for warnings, it must be possible to enable a less verbose mode.
And finally in the third kernel tree the initial problem commit is revealed to be ...
commit f530bc60a30bee47ff51b7fb71511fdd058b774a (HEAD)
Author: Ben Skeggs <bskeggs@redhat.com>
Date: Wed Jun 1 20:46:33 2022 +1000
drm/nouveau/disp: move HDMI config into acquire + infoframe methods
v2:
- fix typo in sorhdmi/g84 struct initialiser (kbuild test robot)
v3:
- less convoluted flow control in nvkm_uoutp_mthd_acquire_tmds() (lyude)
v4:
- we don't support hdmi on original nv50, don't try
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
$ git diff --compact-summary 9793083f1dd9da8dda0ef68e90934dd7d112203b f530bc60a30bee47ff51b7fb71511fdd058b774a
drivers/gpu/drm/nouveau/dispnv50/disp.c | 172 +++++++++++++++++++++++++++++++++++++++++++++--------------------------------------------------------------------
drivers/gpu/drm/nouveau/include/nvif/cl5070.h | 14 ----------
drivers/gpu/drm/nouveau/include/nvif/if0012.h | 24 ++++++++++++++--
drivers/gpu/drm/nouveau/include/nvif/outp.h | 5 +++-
drivers/gpu/drm/nouveau/nvif/outp.c | 28 ++++++++++++++++---
drivers/gpu/drm/nouveau/nvkm/engine/disp/g84.c | 91 +++++++++++++++++++++++++++++++++++++-----------------------
drivers/gpu/drm/nouveau/nvkm/engine/disp/ga102.c | 5 +---
drivers/gpu/drm/nouveau/nvkm/engine/disp/gf119.c | 93 +++++++++++++++++++++++++++++++++++++------------------------
drivers/gpu/drm/nouveau/nvkm/engine/disp/gk104.c | 85 +++++++++++++++++++++++++++++++++++---------------------
drivers/gpu/drm/nouveau/nvkm/engine/disp/gm107.c | 4 +--
drivers/gpu/drm/nouveau/nvkm/engine/disp/gm200.c | 13 ++++++---
drivers/gpu/drm/nouveau/nvkm/engine/disp/gp100.c | 5 +---
drivers/gpu/drm/nouveau/nvkm/engine/disp/gt215.c | 89 +++++++++++++++++++++++++++++++++++-----------------------
drivers/gpu/drm/nouveau/nvkm/engine/disp/gv100.c | 95 +++++++++++++++++++++++++++++++++++++-------------------------
drivers/gpu/drm/nouveau/nvkm/engine/disp/ior.h | 23 +++++++++------
drivers/gpu/drm/nouveau/nvkm/engine/disp/mcp77.c | 4 +--
drivers/gpu/drm/nouveau/nvkm/engine/disp/mcp89.c | 4 +--
drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h | 3 ++
drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c | 45 ------------------------------
drivers/gpu/drm/nouveau/nvkm/engine/disp/tu102.c | 5 +---
drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++++
21 files changed, 503 insertions(+), 378 deletions(-)
I haven't tried reverting that in the latest kernel but it's quite large and is followed by a whole bunch of apparently related commits to Nouveau so there seems little chance that approach would work, it could break Nouveau entirely with unpredictable and possibly undesirable results, I should warn any unwary readers of this thread! :'(