On Tue, Aug 17, 2021 at 01:18:11PM -0300, Eduardo M KALINOWSKI wrote: > I've installed Debian testing on a new computer, with an Intel Core i7-11700 > processor. > > After I added "i915.force_probe=4c8a" to the kernel command-line, graphics > work, but only on the HDMI port. A second monitor in the DisplayPort is not > recognized: > > $ xrandr > Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384 > HDMI-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y > axis) 477mm x 268mm > 1920x1080 60.00*+ 50.00 59.94 > 1920x1080i 60.00 50.00 59.94 > 1680x1050 59.88 > 1280x1024 75.02 60.02 > 1440x900 74.98 59.90 > 1280x960 60.00 > 1280x720 60.00 50.00 59.94 > 1024x768 75.03 60.00 > 800x600 75.00 60.32 > 720x576 50.00 > 720x576i 50.00 > 720x480 60.00 59.94 > 720x480i 60.00 59.94 > 640x480 75.00 72.81 66.67 60.00 59.94 > 720x400 70.08 > DP-1 disconnected (normal left inverted right x axis y axis) > HDMI-2 disconnected (normal left inverted right x axis y axis) > > The cable and monitor are working fine. Dual screens work on Grub and in the > beginning of boot, but once the console font changes, I only get HDMI > output. > > Some more information: > > $ uname -a > Linux gandalf 5.10.0-8-amd64 #1 SMP Debian 5.10.46-4 (2021-08-03) x86_64 > GNU/Linux > > $ inxi -G > Graphics: Device-1: Intel RocketLake-S GT1 [UHD Graphics 750] driver: i915 > v: kernel > Display: x11 server: X.Org 1.20.11 driver: loaded: modesetting > unloaded: fbdev > resolution: 1920x1080~60Hz > OpenGL: renderer: Mesa Intel Graphics (RKL GT1) v: 4.6 Mesa > 20.3.5 > > $ lspci -k -nn -d 8086:4c8a > 00:02.0 VGA compatible controller [0300]: Intel Corporation RocketLake-S GT1 > [UHD Graphics 750] [8086:4c8a] (rev 04) > DeviceName: Onboard - Video > Subsystem: ASUSTeK Computer Inc. Device [1043:8694] > Kernel driver in use: i915 > Kernel modules: i915 > > Anyone has any idea? Or is there any extra information that might be useful? >
If you installed Testing in the run up to Bullseye release on 20210814, can I suggest that you retry with the installer that was released as the final Debian 11 media. The kernel changed in the last few days, it's only a small thing but might make a difference. Do you have firmware installed? I would also suggest that you use the unofficial install medium including non-free firmware. Firmware detection was significantly improved. This can be found at https://cdimage.debian.org/cdimage/unofficial/non-free/cd-including-firmware/11.0.0+nonfree/amd64/iso-cd/firmware-11.0.0-amd64-netinst.iso If there are still problems, an installation report would be helpful. All the very best, as ever, Andy Cater
