I set it via uEnv.txt
I’ve tested usin HDMI connection:
640x480 both 75 and 60 Hz - Ok (fb and Xorg)
800x600 both 75 and 60 Hz - Not Ok, Monitor detects resolution as 400x600, image is broken
1024x768 both 75 and 60 Hz - Ok
1280 x1024@75Hz -Ok
1600x900@60Hz - Ok
1440x900@60Hz - Ok
1920x1080@60Hz(native, selected by default) - Ok
I cant test VGA as I don’t have VGA cable. 
P.S. Tested on both 4.16, and 4.14 (frank’s 4.14-hdmi branch) kernels
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I’ve tested 1024x600@75: It’s don’t works. Resolution detects as 256x600 image is broken, and looks very similar to @tinylib’s photo.
kernel used 4.16
operation system debian/stretch)
resolutions and frequency (vsync) fbconsole 1920x1080@60
xorg 1920x1080 & 1600x1200 & 1680x1050 & ......60Hz
adapters used no
tested function fbconsole & xorg
problems
hdmi no
but
[ 6.447454] of_get_named_gpiod_flags: parsed 'reset-gpios' property of node '/ethernet@1b100000/mdio-bus/switch@0[0]' - status (0)
[ 6.468859] gpio gpiochip0: Persistence not supported for GPIO 33
[ 6.515841] mdio_bus dsa-0.0: GPIO lookup for consumer reset
[ 6.531183] mdio_bus dsa-0.0: using lookup tables for GPIO lookup
[ 6.531197] mdio_bus dsa-0.0: lookup for GPIO reset failed
[ 6.727284] of_get_named_gpiod_flags: can't parse 'link-gpios' property of node '/ethernet@1b100000/mdio-bus/switch@0/ports/port@6/fixed-link[0]'
[ 6.778947] of_get_named_gpiod_flags: can't parse 'reset-gpios' property of node '/ethernet@1b100000/mdio-bus/switch@0/ports/port@6[0]'
at times
[ 584.701629] ata1.00: exception Emask 0x10 SAct 0x4 SErr 0x280100 action 0x6 frozen
[ 584.709355] ata1.00: irq_stat 0x08000000, interface fatal error
[ 584.715429] ata1: SError: { UnrecovData 10B8B BadCRC }
[ 584.720659] ata1.00: failed command: READ FPDMA QUEUED
[ 584.725913] ata1.00: cmd 60/00:10:00:97:f0/01:00:0e:00:00/40 tag 2 ncq dma 131072 in
[ 584.725913] res 40/00:10:00:97:f0/00:00:0e:00:00/40 Emask 0x10 (ATA bus error)
[ 584.741911] ata1.00: status: { DRDY }
[ 584.745646] ata1: hard resetting link
[ 594.742279] ata1: softreset failed (1st FIS failed)
[ 594.747259] ata1: hard resetting link
[ 604.742492] ata1: softreset failed (1st FIS failed)
[ 604.747466] ata1: hard resetting link
[ 639.741993] ata1: softreset failed (1st FIS failed)
[ 639.746974] ata1: limiting SATA link speed to 3.0 Gbps
[ 639.752232] ata1: hard resetting link
[ 644.752017] ata1: softreset failed (1st FIS failed)
[ 644.756992] ata1: reset failed, giving up
[ 644.761068] ata1.00: disabled
[ 644.764188] ata1: EH complete
[ 644.767351] sd 0:0:0:0: [sda] tag#7 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
[ 644.767355] sd 0:0:0:0: [sda] tag#4 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
[ 644.767369] sd 0:0:0:0: [sda] tag#4 CDB: opcode=0x28 28 00 0e f0 97 00 00 01 00 00
[ 644.775686] sd 0:0:0:0: [sda] tag#7 CDB: opcode=0x2a 2a 00 0e e7 98 38 00 00 08 00
[ 644.775700] print_req_error: I/O error, dev sda, sector 250058808
[ 644.784030] print_req_error: I/O error, dev sda, sector 250648320
[ 644.791706] Buffer I/O error on dev sda2, logical block 7, lost async page write
[ 644.819362] sd 0:0:0:0: [sda] tag#5 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
[ 644.827704] sd 0:0:0:0: [sda] tag#5 CDB: opcode=0x28 28 00 0e f0 98 00 00 01 00 00
[ 644.829333] sd 0:0:0:0: [sda] tag#9 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
[ 644.829337] sd 0:0:0:0: [sda] tag#8 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
[ 644.829348] sd 0:0:0:0: [sda] tag#8 CDB: opcode=0x28 28 00 0e f0 97 00 00 00 08 00
[ 644.829353] print_req_error: I/O error, dev sda, sector 250648320
[ 644.829476] sd 0:0:0:0: [sda] tag#10 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
[ 644.829486] sd 0:0:0:0: [sda] tag#10 CDB: opcode=0x28 28 00 0e f0 97 00 00 00 08 00
[ 644.829490] print_req_error: I/O error, dev sda, sector 250648320
[ 644.835470] print_req_error: I/O error, dev sda, sector 250648576
[ 644.843789] sd 0:0:0:0: [sda] tag#9 CDB: opcode=0x2a 2a 00 10 67 98 00 00 00 10 00
[ 644.852204] sd 0:0:0:0: [sda] tag#6 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
[ 644.856161] sd 0:0:0:0: [sda] tag#12 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
[ 644.856175] sd 0:0:0:0: [sda] tag#12 CDB: opcode=0x28 28 00 19 ad cb 80 00 00 70 00
[ 644.856182] print_req_error: I/O error, dev sda, sector 430820224
[ 644.858398] sd 0:0:0:0: [sda] tag#14 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
[ 644.858410] sd 0:0:0:0: [sda] tag#14 CDB: opcode=0x28 28 00 19 ad cb 80 00 00 08 00
[ 644.858416] print_req_error: I/O error, dev sda, sector 430820224
[ 644.858534] sd 0:0:0:0: [sda] tag#16 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
[ 644.858544] sd 0:0:0:0: [sda] tag#16 CDB: opcode=0x28 28 00 19 ad cb 80 00 00 08 00
[ 644.858549] print_req_error: I/O error, dev sda, sector 430820224
[ 644.859843] print_req_error: I/O error, dev sda, sector 275224576
[ 644.866066] sd 0:0:0:0: [sda] tag#6 CDB: opcode=0x2a 2a 00 16 2b 9f 58 00 00 98 00
[ 644.867328] print_req_error: I/O error, dev sda, sector 430740952
[ 644.874453] Buffer I/O error on dev sda2, logical block 3145728, lost async page write
[ 644.874476] Buffer I/O error on dev sda2, logical block 3145729, lost async page write
[ 644.882403] Aborting journal on device sda2-8.
[ 644.888601] Buffer I/O error on dev sda2, logical block 3153953, lost async page write
[ 644.894900] Buffer I/O error on dev sda2, logical block 15237120, lost sync page write
[ 645.034724] Buffer I/O error on dev sda2, logical block 3153956, lost async page write
[ 645.034759] JBD2: Error -5 detected when updating journal superblock for sda2-8.
[ 645.034768] EXT4-fs error (device sda2) in ext4_reserve_inode_write:5764: Journal has aborted
[ 645.034768] EXT4-fs error (device sda2) in ext4_reserve_inode_write:5764: Journal has aborted
[ 645.035001] EXT4-fs (sda2): Remounting filesystem read-only
[ 645.042915] Buffer I/O error on dev sda2, logical block 12582913, lost async page write
[ 645.050726] EXT4-fs (sda2): ext4_writepages: jbd2_start: 4095 pages, ino 5637663; err -30
[ 645.059194] Buffer I/O error on dev sda2, logical block 12582928, lost async page write
[ 645.097110] Buffer I/O error on dev sda2, logical block 12582944, lost async page write
[ 645.113025] EXT4-fs warning (device sda2): ext4_end_bio:323: I/O error 10 writing to inode 5637663 (offset 0 size 0 starting bloc
k 31274641)
[ 645.133573] Buffer I/O error on device sda2, logical block 17296
[ 645.245352] EXT4-fs error (device sda2): ext4_find_entry:1437: inode #4196067: comm aptitude: reading directory lblock 0
[ 645.264372] EXT4-fs (sda2): previous I/O error to superblock detected
[ 668.108211] scsi_io_completion: 26 callbacks suppressed
[ 668.108234] sd 0:0:0:0: [sda] tag#9 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
[ 668.137783] sd 0:0:0:0: [sda] tag#9 CDB: opcode=0x28 28 00 10 68 99 20 00 00 08 00
[ 668.153399] print_req_error: 29 callbacks suppressed
[ 668.153404] print_req_error: I/O error, dev sda, sector 275290400
[ 668.180684] EXT4-fs warning (device sda2): htree_dirblock_to_tree:978: inode #786443: lblock 0: comm aptitude: error -5 reading d
irectory block
[ 668.202310] sd 0:0:0:0: [sda] tag#10 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
[ 668.219044] sd 0:0:0:0: [sda] tag#10 CDB: opcode=0x28 28 00 16 ed 7c 80 00 00 48 00
[ 668.235188] print_req_error: I/O error, dev sda, sector 384662656
[ 668.249973] sd 0:0:0:0: [sda] tag#11 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
[ 668.266886] sd 0:0:0:0: [sda] tag#11 CDB: opcode=0x28 28 00 16 ed 7c 98 00 00 08 00
[ 668.283209] print_req_error: I/O error, dev sda, sector 384662680
Sata-issue seems to be this: SATA Kernel 4.14 failed command: IDENTIFY DEVICE
Need pcie-patch…https://github.com/garywangcn/bpi-r2_lede/blob/bpi-r2-on-lede-v1/target/linux/mediatek/patches-4.9/0073-mtk-pcie-bug-fix.patch
i’ve seen the others,but currently no idea how to fix. These should not occour in 4.14…4.16 is no longtime and will be end-of-life soon
I’ve tested VGA agapter - same results. X*600 resolutions don’t work.
can you please test 1024x768@60 over vga and look at the hsync?
@jofri can you please try last 4.16-main for the sata-issue? i have removed the pcie-nodes and re-added them with the patch-file i’ve used for 4.14 (which seems to fix that issue), not much changes, but maybe it’s enough
Actually, X * 600 are not standard DMT or CEA HDMI resolutions but DVI.
HDMI spec:
MT7623 HW could support these DVI resolutions but I’m not sure whether the related functionality has been implemented or not.
Hi, I’ve testet 1024x768@60 over vga, and I got hsync 48kHz
strange that it does not work in my tests…or only partial after killing xorg first time
@Ryder.Lee can you explain the values for hsync-start and hsync-end because these do not match the expected values
I don’t get your points (hsync-start and hsync-end because these do not match the expected values) ?
Are the values printed calculated or defined…where is this done in code? Currently I can only print them
Also your datasheet is only for 16:9 aspect-ratio…the problems i have are mainly for 4:3 vga-resolutions (1024x768@60, 800x600@60, 640x480@60)…and 720p (where i don’t have any clue why my tv does not recognize signal)
I’ve tested 4.16-main, and I do not think any change is noticeable. Since it does not always occur, it is difficult to make a statement about it. It is noticeable when booting, or when the system is very busy. That’s why I suspect the power supply of the ssd.
Does the sata-error comes again with 4.16-main?
Occasionally yes. I had this error synonymous on other computer and it was always the power supply
Has anybody make a longtime-test and look if system is stable so far? As far as i see i can merge actual hdmi+wifi…some resolutions are not working yet,but a basic graphics-support is available…better than nothing
1 Like
My longest system’s uptime was about 3 days, and always the reason was proper reboot. No hangs was all that time. Hdmi was OK(main resolution - 1920x1080). No wifi was tested - I still have no antenna.
1 Like
@Ryder.Lee i mean this values for hsync-start and end:
mediatek-drm-hdmi 14015000.hdmi: hsync_start:1048,hsync_end:1184, htotal:1344
This seems no kHz value which should be near 48khz for 1024x768
Full log here Hdmi in uboot and linux
Please see my previous post: Searching testing people for hdmi + wifi in Kernel 4.16