After upgrading from a mixture of Debian 11 and 12 to Debian 12, Gnome
started to run Xorg on login instead of Wayland, whereas previously,
Wayland had been used. In uxterm, we see
$ echo $XDG_SESSION_TYPE
x11
$ grep -i Wayland /etc/gdm3/daemon.conf
#WaylandEnable=false
In the journal we find, among other stuff, this:
…
2023-07-06T09:50:41.334837+02:00 AnonymizedMachineName systemd[1957]:
Started app-gnome-gnome\x2dkeyring\x2dssh-2263.scope - Application
launched by gnome-session-binary.
2023-07-06T09:50:41.337128+02:00 AnonymizedMachineName
gnome-keyring-d[1993]: The Secret Service was already initialized
2023-07-06T09:50:41.339085+02:00 AnonymizedMachineName
gnome-keyring-secrets.desktop[2267]: discover_other_daemon:
1GNOME_KEYRING_CONTROL=/run/user/1000/keyring
2023-07-06T09:50:41.353383+02:00 AnonymizedMachineName
gnome-keyring-d[1993]: The PKCS#11 component was already initialized
2023-07-06T09:50:41.354308+02:00 AnonymizedMachineName
dbus-daemon[1995]: [session uid=1000 pid=1995] Activating via systemd:
service name='org.gtk.vfs.MTPVolumeMonitor'
unit='gvfs-mtp-volume-monitor.service' requested by ':1.13' (uid=1000
pid=2124 comm="/usr/libexec/tracker-miner-fs-3")
2023-07-06T09:50:41.355212+02:00 AnonymizedMachineName
gnome-keyring-pkcs11.desktop[2268]: discover_other_daemon:
1GNOME_KEYRING_CONTROL=/run/user/1000/keyring
2023-07-06T09:50:41.355373+02:00 AnonymizedMachineName
gnome-keyring-pkcs11.desktop[2268]: SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
2023-07-06T09:50:41.356700+02:00 AnonymizedMachineName
gnome-keyring-ssh.desktop[2266]: discover_other_daemon:
1GNOME_KEYRING_CONTROL=/run/user/1000/keyring
2023-07-06T09:50:41.356916+02:00 AnonymizedMachineName
gnome-keyring-ssh.desktop[2266]: SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
2023-07-06T09:50:41.358183+02:00 AnonymizedMachineName systemd[1957]:
Starting gvfs-mtp-volume-monitor.service - Virtual filesystem service -
Media Transfer Protocol monitor...
2023-07-06T09:50:41.365168+02:00 AnonymizedMachineName systemd[1957]:
Started gnome-session-manager@gnome.service - GNOME Session Manager
(session: gnome).
2023-07-06T09:50:41.365674+02:00 AnonymizedMachineName systemd[1957]:
Reached target gnome-session-manager.target - GNOME Session Manager is
ready.
2023-07-06T09:50:41.367890+02:00 AnonymizedMachineName systemd[1957]:
Starting org.gnome.Shell@wayland.service - GNOME Shell on Wayland...
2023-07-06T09:50:41.377067+02:00 AnonymizedMachineName systemd[1957]:
Starting org.gnome.Shell@x11.service - GNOME Shell on X11...
2023-07-06T09:50:41.387252+02:00 AnonymizedMachineName systemd[1957]:
org.gnome.Shell@wayland.service: Skipped due to 'exec-condition'.
2023-07-06T09:50:41.387680+02:00 AnonymizedMachineName systemd[1957]:
Condition check resulted in org.gnome.Shell@wayland.service - GNOME
Shell on Wayland being skipped.
2023-07-06T09:50:41.404997+02:00 AnonymizedMachineName systemd[1957]:
Started app-gnome-at\x2dspi\x2ddbus\x2dbus-2270.scope - Application
launched by gnome-session-binary.
Further,
$ sudo cat /run/gdm3/custom.conf
[daemon]
WaylandEnable=false
$ ls -a /etc/udev/rules.d/
. ..
$ ls -a /run/udev/
. .. control data gdm-machine-has-hardware-gpu
gdm-machine-has-hybrid-graphics links static_node-tags tags watch
The machine is stationary (i.e., not a laptop) with two graphic chips,
namely, ASPEED AST2500 64MB and NVIDIA® GeForce® GTX1660 Ti 6GB:
$ sudo lspci -vvvvvvvvvvvvvv| grep -A15 Graphics
04:00.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED
Graphics Family (rev 41) (prog-if 00 [VGA controller])
Subsystem: ASPEED Technology, Inc. ASPEED Graphics Family
Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium
>TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin A routed to IRQ 17
NUMA node: 0
IOMMU group: 32
Region 0: Memory at 8c000000 (32-bit, non-prefetchable) [size=64M]
Region 1: Memory at 90000000 (32-bit, non-prefetchable) [size=128K]
Region 2: I/O ports at 4000 [size=128]
Capabilities: [40] Power Management version 3
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
PME(D0+,D1+,D2+,D3hot+,D3cold+)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [50] MSI: Enable- Count=1/2 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Kernel driver in use: ast
Kernel modules: ast
$ sudo lspci -vvvvvvvvvvvvvv| grep -A81 -i GeForce
65:00.0 VGA compatible controller: NVIDIA Corporation TU116 [GeForce GTX
1660 Ti] (rev a1) (prog-if 00 [VGA controller])
Subsystem: PNY TU116 [GeForce GTX 1660 Ti]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 110
NUMA node: 0
IOMMU group: 3
Region 0: Memory at d7000000 (32-bit, non-prefetchable) [size=16M]
Region 1: Memory at c0000000 (64-bit, prefetchable) [size=256M]
Region 3: Memory at d0000000 (64-bit, prefetchable) [size=32M]
Region 5: I/O ports at b000 [size=128]
Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [60] Power Management version 3
Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA
PME(D0+,D1-,D2-,D3hot+,D3cold-)
Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
Address: 00000000fee000b8 Data: 0000
Capabilities: [78] Express (v2) Legacy Endpoint, MSI 00
DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s
unlimited, L1 <64us
ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset+
DevCtl: CorrErr- NonFatalErr- FatalErr- UnsupReq-
RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+
FLReset-
MaxPayload 128 bytes, MaxReadReq 512 bytes
DevSta: CorrErr+ NonFatalErr- FatalErr- UnsupReq+
AuxPwr- TransPend-
LnkCap: Port #0, Speed 8GT/s, Width x16, ASPM L0s L1,
Exit Latency L0s <512ns, L1 <4us
ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+
LnkCtl: ASPM Disabled; RCB 64 bytes, Disabled- CommClk+
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s (downgraded), Width x16
TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Range AB, TimeoutDis+
NROPrPrP- LTR+
10BitTagComp- 10BitTagReq- OBFF Via message,
ExtFmt- EETLPPrefix-
EmergencyPowerReduction Not Supported,
EmergencyPowerReductionInit-
FRS-
AtomicOpsCap: 32bit- 64bit- 128bitCAS-
DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis+
LTR- 10BitTagReq- OBFF Disabled,
AtomicOpsCtl: ReqEn-
LnkCap2: Supported Link Speeds: 2.5-8GT/s, Crosslink-
Retimer- 2Retimers- DRS-
LnkCtl2: Target Link Speed: 8GT/s, EnterCompliance-
SpeedDis-
Transmit Margin: Normal Operating Range,
EnterModifiedCompliance- ComplianceSOS-
Compliance Preset/De-emphasis: -6dB
de-emphasis, 0dB preshoot
LnkSta2: Current De-emphasis Level: -3.5dB,
EqualizationComplete+ EqualizationPhase1+
EqualizationPhase2+ EqualizationPhase3+
LinkEqualizationRequest-
Retimer- 2Retimers- CrosslinkRes: unsupported
Capabilities: [100 v1] Virtual Channel
Caps: LPEVC=0 RefClk=100ns PATEntryBits=1
Arb: Fixed- WRR32- WRR64- WRR128-
Ctrl: ArbSelect=Fixed
Status: InProgress-
VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
Arb: Fixed- WRR32- WRR64- WRR128- TWRR128-
WRR256-
Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=01
Status: NegoPending- InProgress-
Capabilities: [250 v1] Latency Tolerance Reporting
Max snoop latency: 0ns
Max no snoop latency: 0ns
Capabilities: [258 v1] L1 PM Substates
L1SubCap: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+
ASPM_L1.1+ L1_PM_Substates+
PortCommonModeRestoreTime=255us
PortTPowerOnTime=10us
L1SubCtl1: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1-
T_CommonMode=0us LTR1.2_Threshold=0ns
L1SubCtl2: T_PwrOn=10us
Capabilities: [128 v1] Power Budgeting <?>
Capabilities: [420 v2] Advanced Error Reporting
UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt-
UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt-
UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt-
UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout-
AdvNonFatalErr+
CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout-
AdvNonFatalErr+
AERCap: First Error Pointer: 00, ECRCGenCap- ECRCGenEn-
ECRCChkCap- ECRCChkEn-
MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
HeaderLog: 00000000 00000000 00000000 00000000
Capabilities: [600 v1] Vendor Specific Information: ID=0001
Rev=1 Len=024 <?>
Capabilities: [900 v1] Secondary PCI Express
LnkCtl3: LnkEquIntrruptEn- PerformEqu-
LaneErrStat: 0
Capabilities: [bb0 v1] Physical Resizable BAR
BAR 0: current size: 16MB, supported: 16MB
BAR 1: current size: 256MB, supported: 64MB 128MB 256MB
BAR 3: current size: 32MB, supported: 32MB
Kernel driver in use: nouveau
Kernel modules: nouveau
No monitor is connected to the VGA port connected to the ASPEED card,
and a single monitor is connected to the DisplayPort port of the GeForce
video card.
No proprietary Nvidia drivers are installed:
$ sudo aptitude search nvidia| egrep -v "^(p|v)"
$
As the machine was previously able to run Wayland, it's (hopefully, in
an error-free way) possible in principle. My wild guess is that the
current logic preventing Wayland to run (and generating
WaylandEnable=false in /run/gdm3/custom.conf) might be flawed or too
strong; cf.
https://gitlab.gnome.org/GNOME/gdm/-/merge_requests/171#note_1403697.
Still, I might be wrong on this. I kindly ask the maintainers and
developers for attention to this bug report.
Off-topic, might be related: now (i.e, using xorg), automatic suspend
after a certain timeout doesn't work (the machine remains up and
running), but a manual suspend via gnome menu does work. I'm going to
post another bug report on this.
Gratefully,
AlMa