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--- en:arm:tqma28:linux:ptxdist:faq [2018/05/18 12:42] – ↷ Page moved from en:arm:tqma28:linux:faq to en:arm:tqma28:linux:ptxdist:faq liedmann
+++ en:arm:tqma28:linux:ptxdist:faq [2025/01/28 11:17] (current) – external edit 127.0.0.1
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 ~~NOCACHE~~
-<embed en:templates:tabs>
+{{template>en:templates:tabs_ptxdist_bootstrap|product_type="Embedded module"|lang="en"|mod_name="tqma28"|mod_name_head="TQMa28"|mod_arch="arm"|bsp_name="Linux"|bsp_name_head="Linux"|build_system="ptxdist"|build_system_head="PTXdist"}}
-  <label lang>en</label>
-  <label mod_name>tqma28</label>
-  <label mod_name_head>TQMa28</label>
-  <label mod_arch>arm</label>
-  <label bsp_name>Linux</label>
-  <label bsp_name_head>Linux</label>
-</embed>
 \\
 ===== FAQ =====
-==== U-Boot 2013.04 | MMC timeouts ====
-<code>
-MMC:   MXS MMC: 0, MXS MMC: 1
-MMC0: Command 8 timeout (status 0xe03c4020)
-MMC0: Command 55 timeout (status 0xe02c4020)
-</code>
-These timeouts are **no** errors and totally normal U-Boot behaviour.
-U-Boot probes the device connected to the Synchronous Serial Port. In order to identify eMMC or SD cards U-Boot sends these two commands. A timeout on both commands identifies the eMMC.
-==== U-Boot | Warning: FECx MAC addresses don't match ====
-<code>
-FEC0 [PRIME]
-Warning: FEC0 MAC addresses don't match:
-Address in SROM is         00:d0:00:00:00:00
-Address in environment is  02:00:01:00:00:01
-, FEC1
-</code>
-In U-Boot the MAC address for networking tasks (tftp, ping, dhcp, etc) and to pass to the kernel is stored in the variable **ethaddr**. This variable is defined in the default environment (this is the one used, when environment on e-MMC can't be loaded) with a generic "local-only" MAC address (i.e. first byte, bit 1 "U/L" = 1)
-During ethernet initialisation U-Boot checks MAC address stored in OTP and compares both addresses. Hence the warning.
-To disable the warning you need to set **ethaddr** to your OTP-saved MAC:
-<code>
-TQMa28 U-Boot > setenv ethaddr 00:0d:xx:xx:xx:xx; saveenv
-</code>
-Using __U-Boot 2013.04__ you can also simply use the command otp_mxs:
-<code>
-TQMa28 U-Boot > print ethaddr
-ethaddr=02:00:01:00:00:01
-TQMa28 U-Boot > otp_mxs getmac; saveenv
-TQMa28 U-Boot > print ethaddr
-ethaddr=00:D0:00:00:00:00
-</code>
-==== Linux | Error: no PHY found or Segmentation fault when ifconfig up ====
-BSP0106 changed the default source of ENET_CLK to external oscillator. Previously the source was FEC unit inside the CPU. The source is selected in U-Boot, which provides the setting to kernel via device tree (TQMa28/28L) or command-line (TQMa28-fsl).
-U-Boot informs about the selected clock on boot:
-  * **Net:   [FEC MXS: Using external ENET_CLK]**
-  * **Net:   [FEC MXS: Using internal ENET_CLK]**
-To switch ENET_CLK source to internal FEC unit:
-<code>
-TQMa28 U-Boot > setenv enet_clk_internal 1; saveenv; reset
-</code>
-Switching back is easy:
-<code>
-TQMa28 U-Boot > setenv enet_clk_internal; saveenv; reset
-# notice that setenv assigns no value to delete the variable
-</code>
-U-Boot selects the internal ENET_CLK source upon presence of this environment variable with a positive value (y/yes/1).
-The variable is evaluated during ethernet initialisation and therefore a change in the variable takes place upon next boot.
-==== PTXdist | Error: Couldn't allocate a block (no free space) ====
-Creating root.ext2 from working dir...<BSP project path>/platform-<platform_name>/sysroot-host/bin/genext2fs: couldn't allocate a block (no free space)
-The error signals that the filesystem is too small for the content that should be installed. Increase size.
-<code>
-=> go to ptxdist menu
-=> platformconfig
-=> image creation options
-=> Generate images/root.ext2
- -> Size in kilobytes: increase to reasonable size (65536 should be enough for most cases)
-</code>
-==== PTXdist | Download packages through proxy authentication ====
-In case you have a proxy server in your local network that requires user authentication before going online,
-you have several ways to have ptxdist perform the authentication for you when downloading packages.
-Because ptxdist relies on the program wget to download sources,
-we need to tell wget about the authentication:
-<code>
-(tested)
-=> edit /etc/wgetc (needs sudo privileges)
-=> Add lines anywhere in the file:
- http_proxy = http://<proxy address>:<proxy port>/
- ftp_proxy = ftp://<proxy address>:<proxy port>/
- proxy_user = <your proxy username>
- proxy_password = <your proxy password>
- use_proxy = on
-</code>
-<code>
-(untested - please tell us if one of these works for you)
-> Change ptxdist setting at "User Properties" - "Proxies"
- -> Set http proxy to this format: http://<username>:<password>@<proxy address>:<port>/
- -> Adapt for the ftp proxy
-> Or export http_proxy and ftp_proxy environment variables alike
-</code>
-==== U-Boot | "MMC: block number ... exceeds max (...)" ===
-The reason for this error is that the saved environment belongs to a different U-Boot version.
-TQ provides U-Boot in versions 2009.08 and 2012.10, because the kernels can't run both on 2009.08.
-The syntax of some commands changed between U-Boot versions and thus their environment (which holds scripts using these commands) are incompatible.
-=> To resolve this error please delete the saved environment as follows depending on your current U-Boot version:
-  * U-Boot 2009.08
-<code>
-mw.b $loadaddr 0 512
-mmc write 0 $loadaddr 2 1
-</code>
-  * U-Boot 2012.10
-<code>
-mw.b $loadaddr 0 512
-mmc dev 0
-mmc write $loadaddr 2 1
-</code>
-<WRAP round important>Please consider a [[en:arm:tqma28:linux:known_issues|known issue]] where the environment gets always saved to e-MMC\\ even when booting the SD card.</WRAP>
-==== U-Boot | "set read bl len failed" on access to SD card ====
-=> After being plugged in the sd card must be initialised prior to any access. The command <code>mmc rescan 1</code> does that.
-==== U-Boot | Usage messages for the command "setenv" ====
-U-Boot prints the following error message at boot time:
-<code>
-setenv - set environment variables
-Usage:
-setenv name value ...
-    - set environment variable 'name' to 'value ...'
-setenv name
-    - delete environment variable 'name'
-</code>
-=> Amongst others a reason for this is that the U-Boot environment variable //bootargs// has been accidentally stored in the flash environment and already contains a value. The error occurs because the final value (string) to be stored in this variable eventually becomes too long.
-To remedy just clear the variable //bootargs// und save the environment to flash:
-<code>
-setenv bootargs
-saveenv
-</code>
-==== Errormessage "can't access tty" at login ====
-If you use a precompiled rootfs you probably encounter following error message:
-<code>
-generic-armv5te login: root
--sh: can't access tty; job control turned off
-root@generic-armv5te:~#
-</code>
-To resolve this issue specify your real console in /etc/inittab
-<code>
-#change following line
-S:2345:respawn:/sbin/getty 115200 console
-#to i.e. (depending on your console, see your kernel command line arguments)
-S:2345:respawn:/sbin/getty 115200 ttyAPP3
-</code>
-and reboot.
-==== Linux boot Kernel panic Unable to mount root fs ====
-Error message:
-<code>
-[    1.090000] VFS: Cannot open root device "mmcblk0p3" or unknown-block(0,0): error -6
-[    1.100000] Please append a correct "root=" boot option; here are the available partitions:
-[    1.110000] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
-[    1.110000] [<c00139f8>] (unwind_backtrace+0x0/0xf0) from [<c02f87fc>] (panic+0x98/0x1f4)
-[    1.110000] [<c02f87fc>] (panic+0x98/0x1f4) from [<c042cbf4>] (mount_block_root+0x178/0x22c)
-[    1.110000] [<c042cbf4>] (mount_block_root+0x178/0x22c) from [<c042cd8c>] (mount_root+0xe4/0x10c)
-[    1.110000] [<c042cd8c>] (mount_root+0xe4/0x10c) from [<c042ced0>] (prepare_namespace+0x11c/0x180)
-[    1.110000] [<c042ced0>] (prepare_namespace+0x11c/0x180) from [<c042c8b0>] (kernel_init+0x170/0x1ac)
-[    1.110000] [<c042c8b0>] (kernel_init+0x170/0x1ac) from [<c000f8b4>] (kernel_thread_exit+0x0/0x8)
-[    1.110000] Rebooting in 1 seconds..
-</code>
-Kernel command line:
-<code>
-[    0.000000] Kernel command line: fec_mac=02:00:01:00:00:01 ip=:::::eth0:off root=/dev/mmcblk0p3 ro console=ttyAPP3,115200 lcd_panel=fg0700 ssp1 panic=1
-</code>
-U-Boot mmc part lists the partition:
-<code>
-TQMa28 U-Boot > mmc part
-Partition Map for MMC device 0  --   Partition Type: DOS
-Partition     Start Sector     Num Sectors     Type
-                16384           16384      53
-                32768           16384      83
-                49152         3784704      83
-</code>
-Solution: add the ''rootwait'' option to the command line:
-<code>
-TQMa28 U-Boot > setenv addmmc 'setenv bootargs $bootargs root=/dev/mmcblk0p3 ro rootwait'
-</code>