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Bug #315

open
MG

Xorg/Wayland show black screen when system memory is 4GB or higher

Bug #315: Xorg/Wayland show black screen when system memory is 4GB or higher

Added by Master Geek over 4 years ago. Updated over 4 years ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
-
Target version:
-
Start date:
08/02/2021
Due date:
% Done:

0%

Estimated time:
Affected versions:
Needs backport to:
Affected hardware:
Affected OS:

Description

Board: ASROCK G41M-VS3 R2.0
CB Revision: coreboot-4.14-1258-gfbc46a3bfb

When this board has one memory stick with 2GB of ram, or two memory sticks with 1GB and 2GB (3GB total) there's no issue with display; Xorg and wayland (using weston) work as expected. But when there's 4GB or maybe more (two 2GB sticks only available, haven't tried a single 4GB stick) the system works as expected up to just before starting Xorg or wayland, the screen goes black and nothing else happens. Returning to a tty by means of Ctrl-Alt-# 'ing to some other tty doesn't bring display back, neither does exitting/killing Xorg or wayland. Not even forcefully removing and reloading the relevant kernel modules (i915, drm) does anything to bring the display back, display will only comeback with a reboot.

When the screen goes black there's no system freeze of any kind, and the kernel complains with a single line:
"i915 0000:00:02.0: [drm] ERROR CPU pipe A FIFO underrun"
that isn't very helpful for debugging imo.

Attached dmesg loglevel=9 logs of stock bios, coreboot with 4GB (coreboot_bad) and with 2GB (coreboot_good), cbmem console log of coreboot with 2GB (cbmem_good).

Files

Download all files
cb_config.txt (16.3 KB) cb_config.txt Coreboot config file Master Geek, 08/02/2021 06:32 PM
cbmem_good.log (31.3 KB) cbmem_good.log cbmem output working (2GB) Master Geek, 08/02/2021 06:32 PM
dmesg_coreboot_good.log (457 KB) dmesg_coreboot_good.log dmesg output working (2GB) Master Geek, 08/02/2021 06:32 PM
dmesg_coreboot_bad.log (443 KB) dmesg_coreboot_bad.log dmesg output not working (4GB) Master Geek, 08/02/2021 06:32 PM
dmesg_stock_bios.log (315 KB) dmesg_stock_bios.log dmesg output stock bios (4GB) Master Geek, 08/02/2021 06:32 PM
cbmem_good.log (36.6 KB) cbmem_good.log cbmem output working (2GB) Master Geek, 08/02/2021 06:55 PM
cbmem_bad.log (37 KB) cbmem_bad.log cbmem output not working (4GB) Master Geek, 08/02/2021 06:55 PM
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