FS#69901 - [linux] Unable to connect to monitors via docking station with kernel 5.11
Attached to Project:
Arch Linux
Opened by Bodo Graumann (bodo) - Sunday, 07 March 2021, 08:41 GMT
Last edited by Jan Alexander Steffens (heftig) - Thursday, 13 May 2021, 18:34 GMT
Opened by Bodo Graumann (bodo) - Sunday, 07 March 2021, 08:41 GMT
Last edited by Jan Alexander Steffens (heftig) - Thursday, 13 May 2021, 18:34 GMT
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Details
Description:
After an update to linux-5.11.2 I am not able to use the external monitors anymore. Instead I get lots of these errors: > kernel: i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful and this error once: > kernel: i915 0000:00:02.0: [drm] *ERROR* CPU pipe C FIFO underrun The docking station is a Dell WD19 connected via the USB-C connector. As a graphics adapter I have an Intel HD 620. Curiously on another machine with an Intel HD 630 the problem does not occur. Downgrading to 5.10.16 gave me back the functionality for now. I also tried the 5.11.3 kernel version from testing, without success. Additional info: lspci -v output: ``` 00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device 224b Flags: bus master, fast devsel, latency 0, IRQ 138 Memory at eb000000 (64-bit, non-prefetchable) [size=16M] Memory at a0000000 (64-bit, prefetchable) [size=256M] I/O ports at e000 [size=64] Expansion ROM at 000c0000 [virtual] [disabled] [size=128K] Capabilities: [40] Vendor Specific Information: Len=0c <?> Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 2 Capabilities: [100] Process Address Space ID (PASID) Capabilities: [200] Address Translation Service (ATS) Capabilities: [300] Page Request Interface (PRI) Kernel driver in use: i915 Kernel modules: i915 ``` |
This task depends upon
Closed by Jan Alexander Steffens (heftig)
Thursday, 13 May 2021, 18:34 GMT
Reason for closing: Fixed
Additional comments about closing: 5.12.3
Thursday, 13 May 2021, 18:34 GMT
Reason for closing: Fixed
Additional comments about closing: 5.12.3
Comment by
Jan Alexander Steffens (heftig) -
Sunday, 07 March 2021, 15:15 GMT
Comment by Bodo Graumann (bodo) -
Monday, 08 March 2021, 14:22 GMT
Comment by Bodo Graumann (bodo) -
Thursday, 13 May 2021, 16:19 GMT
Please file this upstream at
https://gitlab.freedesktop.org/drm/intel/-/issues
Upstream bug report:
https://gitlab.freedesktop.org/drm/intel/-/issues/3166
Is fixed on latest version 5.12.3-arch1-1.