Re: Error report on FreeBSD-14.2-BETA2 - graphics problem

On 11/14/24 10:33, Ronald Klop wrote:
> Op 12-11-2024 om 19:17 schreef Zahemszky Gábor:
>> Hi!
>>
>> On a Lenovo Thinkpad T470 (with an Intel Core i7-6600U CPU plus an 
>> Intel GPU), I have this problem:
>>
>> I cannot switch into character based virtual terminals from
>> the X11 graphical screen. When I press Alt-Ctrl-F[1-7] the
>> machine "freeze" - it doesn't do anything, mouse / keyboard
>> doesn't work after it. I can only halt the machine with
>> the power button.
>>
>> It worked under 14.1 - on all of the patch levels.
>>
>> $ pciconf -lv
>> vgapci0@pci0:0:2:0:     class=0x030000 rev=0x07 hdr=0x00 vendor=0x8086 
>> device=0x1916 subvendor=0x17aa subdevice=0x2245
>>      vendor     = 'Intel Corporation'
>>      device     = 'Skylake GT2 [HD Graphics 520]'
>>      class      = display
>>      subclass   = VGA
>>
>>
>> $ pkg info -x drm
>> drm-61-kmod-6.1.92
>> drm-kmod-20220907_3
>> libdrm-2.4.123,1
>>
>> Some strange lines from dmesg:
>>
>> ...
>> drm] Got Intel graphics stolen memory base 0x7a800000, size 0x2000000
>> drmn0: <drmn> on vgapci0
>> vgapci0: child drmn0 requested pci_enable_io
>> vgapci0: child drmn0 requested pci_enable_io
>> skl_dmc_ver1_27.bin: could not load binary firmware /boot/firmware/ 
>> skl_dmc_ver1_27.bin either
>> i915/skl_dmc_ver1_27.bin: could not load binary firmware /boot/ 
>> firmware/i915/skl_dmc_ver1_27.bin either
>> i915_skl_dmc_ver1_27.bin: could not load binary firmware /boot/ 
>> firmware/i915_skl_dmc_ver1_27.bin either
>> drmn0: successfully loaded firmware image 'i915/skl_dmc_ver1_27.bin'
>> drmn0: [drm] Finished loading DMC firmware i915/skl_dmc_ver1_27.bin 
>> (v1.27)
>> ...
>> iic2: <I2C generic I/O> on iicbus2
>> drmn0: [drm] [ENCODER:102:DDI B/PHY B] is disabled/in DSI mode with an 
>> ungated DDI clock, gate it
>> drmn0: [drm] [ENCODER:117:DDI C/PHY C] is disabled/in DSI mode with an 
>> ungated DDI clock, gate it
>> sysctl_warn_reuse: can't re-use a leaf (hw.dri.debug)!
>> ...
>> ic5: <I2C generic I/O> on iicbus5
>> [drm] Initialized i915 1.6.0 20201103 for drmn0 on minor 0
>> VT: Driver priority 0 too low. Current 101
>>   fbd0: not attached to vt(4) console; another device has precedence 
>> (err=17)
>> acpi_ibm0: <ThinkPad ACPI Extras> on acpi0
>> acpi_ibm0: Firmware version is 0x200
>> acpi_video0: <ACPI video extension> on vgapci0
>> ...
>> Security policy loaded: MAC/ntpd (mac_ntpd)
>> drmn0: [drm] *ERROR* Fault errors on pipe A: 0x00000080
>> drmn0: [drm] *ERROR* Fault errors on pipe A: 0x00000080
>> hdac0: Command 0x20220011 timeout on address 2
>> hdac0: Command 0x20270d01 timeout on address 2
>> hdac0: Command 0x20270620 timeout on address 2
>> ...
>>
>> Bye,
>>
>> ZAHEMSZKY, Gabor
>>
>>
> 
> 
> Hi,
> 
> Did you rebuild the drm*kmod packages? These packages tent to depend on 
> kernel internals which might be out of sync. The official packages are 
> not build against FreeBSD 14.2-BETA.
> BTW: I'm not involved on the graphics stack. Just repeating what I read 
> on here more often.
> 
> Ronald.
> 
> 14.1-RELEASE-p6



I also had the same issue with one of my antique Intel Q6600 based 
systems, equipped with a Radeon HD6450 graphics adapter. As soon as 
radeonkms.ko is loaded ttyv[0-7] are unreachable. X keeps running OK on 
ttyv8. There is also this suspect message in motd once radeonkms is loaded:

VT: Driver priority 0 too low. Current 100
  fbd0: not attached to vt(4) console; another device has precedence 
(err=17)

This happened for both BETA1 and BETA2. An identical twin system running 
14.1-RELEASE-p6 does not have the issue.

I could indeed resolve this problem by rebuilding the drm-61-kmod 
package from ports on BETA2. I still wonder what we have to tell an 
unsuspecting (possibly beginning) end user who stumbles over this issue.

-- 
Kind regards,

Hans Ottevanger

Eindhoven, Netherlands
hans@beastielabs.net
www.beastielabs.net